From 40f6d1e46cdf8f958ad682c9ae0aeb73d27ce616 Mon Sep 17 00:00:00 2001
From: William Bergamin <wbergamin@salesforce.com>
Date: Wed, 14 Aug 2024 20:12:42 +0000
Subject: [PATCH] version 1.20.0 (#1128)

---
 .../adapter/asgi/builtin/index.html           |  15 -
 .../slack_bolt/adapter/asgi/index.html        |  15 -
 .../chalice_lazy_listener_runner.html         |  10 -
 .../aws_lambda/lambda_s3_oauth_flow.html      |  40 +-
 .../aws_lambda/lazy_listener_runner.html      |  10 -
 .../slack_bolt/adapter/django/handler.html    |  10 -
 .../google_cloud_functions/handler.html       |  10 -
 docs/static/api-docs/slack_bolt/app/app.html  | 115 ++++-
 .../api-docs/slack_bolt/app/async_app.html    | 117 ++++-
 .../static/api-docs/slack_bolt/app/index.html | 115 ++++-
 .../static/api-docs/slack_bolt/async_app.html | 268 +++++++++++-
 .../slack_bolt/context/async_context.html     | 151 ++++++-
 .../slack_bolt/context/base_context.html      |  77 ++++
 .../context/complete/async_complete.html      | 122 ++++++
 .../slack_bolt/context/complete/complete.html | 120 ++++++
 .../slack_bolt/context/complete/index.html    | 137 ++++++
 .../api-docs/slack_bolt/context/context.html  | 151 ++++++-
 .../slack_bolt/context/fail/async_fail.html   | 120 ++++++
 .../slack_bolt/context/fail/fail.html         | 120 ++++++
 .../slack_bolt/context/fail/index.html        | 137 ++++++
 .../api-docs/slack_bolt/context/index.html    | 161 ++++++-
 docs/static/api-docs/slack_bolt/index.html    | 404 +++++++++++++++++-
 .../slack_bolt/kwargs_injection/args.html     |  20 +-
 .../kwargs_injection/async_args.html          |  20 +-
 .../slack_bolt/kwargs_injection/index.html    |  22 +-
 .../slack_bolt/listener_matcher/builtins.html |   7 +
 .../slack_bolt/middleware/async_builtins.html |  55 ++-
 .../middleware/async_middleware.html          |   1 +
 .../async_attaching_function_token.html       | 102 +++++
 .../attaching_function_token.html             | 102 +++++
 .../attaching_function_token/index.html       | 119 ++++++
 .../api-docs/slack_bolt/middleware/index.html |  46 ++
 .../slack_bolt/middleware/middleware.html     |   1 +
 .../middleware/ssl_check/async_ssl_check.html |  15 -
 .../slack_bolt/request/internals.html         |  21 +
 .../slack_bolt/request/payload_utils.html     |   7 +
 .../api-docs/slack_bolt/workflows/index.html  |   4 +-
 .../slack_bolt/workflows/step/async_step.html |  48 +--
 .../workflows/step/async_step_middleware.html |   4 +-
 .../slack_bolt/workflows/step/index.html      |  38 +-
 .../slack_bolt/workflows/step/step.html       |  48 +--
 .../workflows/step/step_middleware.html       |   4 +-
 .../step/utilities/async_complete.html        |   4 +-
 .../workflows/step/utilities/async_fail.html  |   4 +-
 .../workflows/step/utilities/complete.html    |   4 +-
 .../workflows/step/utilities/fail.html        |   4 +-
 .../workflows/step/utilities/index.html       |   6 +-
 slack_bolt/version.py                         |   2 +-
 48 files changed, 2828 insertions(+), 305 deletions(-)
 create mode 100644 docs/static/api-docs/slack_bolt/context/complete/async_complete.html
 create mode 100644 docs/static/api-docs/slack_bolt/context/complete/complete.html
 create mode 100644 docs/static/api-docs/slack_bolt/context/complete/index.html
 create mode 100644 docs/static/api-docs/slack_bolt/context/fail/async_fail.html
 create mode 100644 docs/static/api-docs/slack_bolt/context/fail/fail.html
 create mode 100644 docs/static/api-docs/slack_bolt/context/fail/index.html
 create mode 100644 docs/static/api-docs/slack_bolt/middleware/attaching_function_token/async_attaching_function_token.html
 create mode 100644 docs/static/api-docs/slack_bolt/middleware/attaching_function_token/attaching_function_token.html
 create mode 100644 docs/static/api-docs/slack_bolt/middleware/attaching_function_token/index.html

diff --git a/docs/static/api-docs/slack_bolt/adapter/asgi/builtin/index.html b/docs/static/api-docs/slack_bolt/adapter/asgi/builtin/index.html
index 0ad9e6303..66bead34a 100644
--- a/docs/static/api-docs/slack_bolt/adapter/asgi/builtin/index.html
+++ b/docs/static/api-docs/slack_bolt/adapter/asgi/builtin/index.html
@@ -113,17 +113,6 @@ <h3>Subclasses</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.adapter.asgi.aiohttp.AsyncSlackRequestHandler" href="../aiohttp/index.html#slack_bolt.adapter.asgi.aiohttp.AsyncSlackRequestHandler">AsyncSlackRequestHandler</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.asgi.builtin.SlackRequestHandler.app"><code class="name">var <span class="ident">app</span> : <a title="slack_bolt.app.app.App" href="../../../app/app.html#slack_bolt.app.app.App">App</a></code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.asgi.builtin.SlackRequestHandler.path"><code class="name">var <span class="ident">path</span> : str</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.adapter.asgi.base_handler.BaseSlackRequestHandler" href="../base_handler.html#slack_bolt.adapter.asgi.base_handler.BaseSlackRequestHandler">BaseSlackRequestHandler</a></b></code>:
@@ -152,10 +141,6 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.adapter.asgi.builtin.SlackRequestHandler" href="#slack_bolt.adapter.asgi.builtin.SlackRequestHandler">SlackRequestHandler</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.adapter.asgi.builtin.SlackRequestHandler.app" href="#slack_bolt.adapter.asgi.builtin.SlackRequestHandler.app">app</a></code></li>
-<li><code><a title="slack_bolt.adapter.asgi.builtin.SlackRequestHandler.path" href="#slack_bolt.adapter.asgi.builtin.SlackRequestHandler.path">path</a></code></li>
-</ul>
 </li>
 </ul>
 </li>
diff --git a/docs/static/api-docs/slack_bolt/adapter/asgi/index.html b/docs/static/api-docs/slack_bolt/adapter/asgi/index.html
index b9eb9ddab..0f6acfa46 100644
--- a/docs/static/api-docs/slack_bolt/adapter/asgi/index.html
+++ b/docs/static/api-docs/slack_bolt/adapter/asgi/index.html
@@ -144,17 +144,6 @@ <h3>Subclasses</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.adapter.asgi.aiohttp.AsyncSlackRequestHandler" href="aiohttp/index.html#slack_bolt.adapter.asgi.aiohttp.AsyncSlackRequestHandler">AsyncSlackRequestHandler</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.asgi.SlackRequestHandler.app"><code class="name">var <span class="ident">app</span> : <a title="slack_bolt.app.app.App" href="../../app/app.html#slack_bolt.app.app.App">App</a></code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.asgi.SlackRequestHandler.path"><code class="name">var <span class="ident">path</span> : str</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.adapter.asgi.base_handler.BaseSlackRequestHandler" href="base_handler.html#slack_bolt.adapter.asgi.base_handler.BaseSlackRequestHandler">BaseSlackRequestHandler</a></b></code>:
@@ -194,10 +183,6 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.adapter.asgi.SlackRequestHandler" href="#slack_bolt.adapter.asgi.SlackRequestHandler">SlackRequestHandler</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.adapter.asgi.SlackRequestHandler.app" href="#slack_bolt.adapter.asgi.SlackRequestHandler.app">app</a></code></li>
-<li><code><a title="slack_bolt.adapter.asgi.SlackRequestHandler.path" href="#slack_bolt.adapter.asgi.SlackRequestHandler.path">path</a></code></li>
-</ul>
 </li>
 </ul>
 </li>
diff --git a/docs/static/api-docs/slack_bolt/adapter/aws_lambda/chalice_lazy_listener_runner.html b/docs/static/api-docs/slack_bolt/adapter/aws_lambda/chalice_lazy_listener_runner.html
index 035f2e129..ae14fefda 100644
--- a/docs/static/api-docs/slack_bolt/adapter/aws_lambda/chalice_lazy_listener_runner.html
+++ b/docs/static/api-docs/slack_bolt/adapter/aws_lambda/chalice_lazy_listener_runner.html
@@ -78,13 +78,6 @@ <h3>Ancestors</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.aws_lambda.chalice_lazy_listener_runner.ChaliceLazyListenerRunner.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></b></code>:
@@ -112,9 +105,6 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.adapter.aws_lambda.chalice_lazy_listener_runner.ChaliceLazyListenerRunner" href="#slack_bolt.adapter.aws_lambda.chalice_lazy_listener_runner.ChaliceLazyListenerRunner">ChaliceLazyListenerRunner</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.adapter.aws_lambda.chalice_lazy_listener_runner.ChaliceLazyListenerRunner.logger" href="#slack_bolt.adapter.aws_lambda.chalice_lazy_listener_runner.ChaliceLazyListenerRunner.logger">logger</a></code></li>
-</ul>
 </li>
 </ul>
 </li>
diff --git a/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lambda_s3_oauth_flow.html b/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lambda_s3_oauth_flow.html
index cbf880d2b..5529ccbed 100644
--- a/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lambda_s3_oauth_flow.html
+++ b/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lambda_s3_oauth_flow.html
@@ -119,37 +119,6 @@ <h3>Ancestors</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="../../oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.client_id"><code class="name">var <span class="ident">client_id</span> : str</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.failure_handler"><code class="name">var <span class="ident">failure_handler</span> : Callable[[<a title="slack_bolt.oauth.callback_options.FailureArgs" href="../../oauth/callback_options.html#slack_bolt.oauth.callback_options.FailureArgs">FailureArgs</a>], <a title="slack_bolt.response.response.BoltResponse" href="../../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.install_path"><code class="name">var <span class="ident">install_path</span> : str</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.redirect_uri"><code class="name">var <span class="ident">redirect_uri</span> : Optional[str]</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.redirect_uri_path"><code class="name">var <span class="ident">redirect_uri_path</span> : str</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.settings"><code class="name">var <span class="ident">settings</span> : <a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="../../oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a></code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.success_handler"><code class="name">var <span class="ident">success_handler</span> : Callable[[<a title="slack_bolt.oauth.callback_options.SuccessArgs" href="../../oauth/callback_options.html#slack_bolt.oauth.callback_options.SuccessArgs">SuccessArgs</a>], <a title="slack_bolt.response.response.BoltResponse" href="../../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Instance variables</h3>
 <dl>
 <dt id="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.client"><code class="name">prop <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
@@ -199,16 +168,9 @@ <h3>Instance variables</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow">LambdaS3OAuthFlow</a></code></h4>
-<ul class="two-column">
+<ul class="">
 <li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.client" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.client">client</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.client_id" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.client_id">client_id</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.failure_handler" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.failure_handler">failure_handler</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.install_path" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.install_path">install_path</a></code></li>
 <li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.logger" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.logger">logger</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.redirect_uri" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.redirect_uri">redirect_uri</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.redirect_uri_path" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.redirect_uri_path">redirect_uri_path</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.settings" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.settings">settings</a></code></li>
-<li><code><a title="slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.success_handler" href="#slack_bolt.adapter.aws_lambda.lambda_s3_oauth_flow.LambdaS3OAuthFlow.success_handler">success_handler</a></code></li>
 </ul>
 </li>
 </ul>
diff --git a/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lazy_listener_runner.html b/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lazy_listener_runner.html
index c83e0c628..72237c202 100644
--- a/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lazy_listener_runner.html
+++ b/docs/static/api-docs/slack_bolt/adapter/aws_lambda/lazy_listener_runner.html
@@ -70,13 +70,6 @@ <h3>Ancestors</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.aws_lambda.lazy_listener_runner.LambdaLazyListenerRunner.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></b></code>:
@@ -104,9 +97,6 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.adapter.aws_lambda.lazy_listener_runner.LambdaLazyListenerRunner" href="#slack_bolt.adapter.aws_lambda.lazy_listener_runner.LambdaLazyListenerRunner">LambdaLazyListenerRunner</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.adapter.aws_lambda.lazy_listener_runner.LambdaLazyListenerRunner.logger" href="#slack_bolt.adapter.aws_lambda.lazy_listener_runner.LambdaLazyListenerRunner.logger">logger</a></code></li>
-</ul>
 </li>
 </ul>
 </li>
diff --git a/docs/static/api-docs/slack_bolt/adapter/django/handler.html b/docs/static/api-docs/slack_bolt/adapter/django/handler.html
index 2411a516e..efd5fc50d 100644
--- a/docs/static/api-docs/slack_bolt/adapter/django/handler.html
+++ b/docs/static/api-docs/slack_bolt/adapter/django/handler.html
@@ -154,13 +154,6 @@ <h3>Ancestors</h3>
 <li><a title="slack_bolt.lazy_listener.thread_runner.ThreadLazyListenerRunner" href="../../lazy_listener/thread_runner.html#slack_bolt.lazy_listener.thread_runner.ThreadLazyListenerRunner">ThreadLazyListenerRunner</a></li>
 <li><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.django.handler.DjangoThreadLazyListenerRunner.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.lazy_listener.thread_runner.ThreadLazyListenerRunner" href="../../lazy_listener/thread_runner.html#slack_bolt.lazy_listener.thread_runner.ThreadLazyListenerRunner">ThreadLazyListenerRunner</a></b></code>:
@@ -290,9 +283,6 @@ <h4><code><a title="slack_bolt.adapter.django.handler.DjangoListenerStartHandler
 </li>
 <li>
 <h4><code><a title="slack_bolt.adapter.django.handler.DjangoThreadLazyListenerRunner" href="#slack_bolt.adapter.django.handler.DjangoThreadLazyListenerRunner">DjangoThreadLazyListenerRunner</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.adapter.django.handler.DjangoThreadLazyListenerRunner.logger" href="#slack_bolt.adapter.django.handler.DjangoThreadLazyListenerRunner.logger">logger</a></code></li>
-</ul>
 </li>
 <li>
 <h4><code><a title="slack_bolt.adapter.django.handler.SlackRequestHandler" href="#slack_bolt.adapter.django.handler.SlackRequestHandler">SlackRequestHandler</a></code></h4>
diff --git a/docs/static/api-docs/slack_bolt/adapter/google_cloud_functions/handler.html b/docs/static/api-docs/slack_bolt/adapter/google_cloud_functions/handler.html
index 888e635da..be307b43f 100644
--- a/docs/static/api-docs/slack_bolt/adapter/google_cloud_functions/handler.html
+++ b/docs/static/api-docs/slack_bolt/adapter/google_cloud_functions/handler.html
@@ -56,13 +56,6 @@ <h3>Ancestors</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.adapter.google_cloud_functions.handler.NoopLazyListenerRunner.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.lazy_listener.runner.LazyListenerRunner" href="../../lazy_listener/runner.html#slack_bolt.lazy_listener.runner.LazyListenerRunner">LazyListenerRunner</a></b></code>:
@@ -133,9 +126,6 @@ <h3>Methods</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.adapter.google_cloud_functions.handler.NoopLazyListenerRunner" href="#slack_bolt.adapter.google_cloud_functions.handler.NoopLazyListenerRunner">NoopLazyListenerRunner</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.adapter.google_cloud_functions.handler.NoopLazyListenerRunner.logger" href="#slack_bolt.adapter.google_cloud_functions.handler.NoopLazyListenerRunner.logger">logger</a></code></li>
-</ul>
 </li>
 <li>
 <h4><code><a title="slack_bolt.adapter.google_cloud_functions.handler.SlackRequestHandler" href="#slack_bolt.adapter.google_cloud_functions.handler.SlackRequestHandler">SlackRequestHandler</a></code></h4>
diff --git a/docs/static/api-docs/slack_bolt/app/app.html b/docs/static/api-docs/slack_bolt/app/app.html
index f81d28b7a..8a88e40af 100644
--- a/docs/static/api-docs/slack_bolt/app/app.html
+++ b/docs/static/api-docs/slack_bolt/app/app.html
@@ -37,7 +37,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
 <dt id="slack_bolt.app.app.App"><code class="flex name class">
 <span>class <span class="ident">App</span></span>
-<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="../authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="../oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="../oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a>] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None)</span>
+<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="../authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, attaching_function_token_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="../oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="../oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a>] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>Bolt App that provides functionalities to register middleware/listeners.</p>
@@ -111,6 +111,10 @@ <h2 id="args">Args</h2>
 <dd>False if you would like to disable the built-in middleware (Default: True).
 <code>UrlVerification</code> is a built-in middleware that handles url_verification requests
 that verify the endpoint for Events API in HTTP Mode requests.</dd>
+<dt><strong><code>attaching_function_token_enabled</code></strong></dt>
+<dd>False if you would like to disable the built-in middleware (Default: True).
+<code>AttachingFunctionToken</code> is a built-in middleware that injects the just-in-time workflow-execution tokens
+when your app receives <code>function_executed</code> or interactivity events scoped to a custom step.</dd>
 <dt><strong><code>ssl_check_enabled</code></strong></dt>
 <dd>bool = False if you would like to disable the built-in middleware (Default: True).
 <code>SslCheck</code> is a built-in middleware that handles ssl_check requests from Slack.</dd>
@@ -157,6 +161,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         # for the OAuth flow
         oauth_settings: Optional[OAuthSettings] = None,
         oauth_flow: Optional[OAuthFlow] = None,
@@ -222,6 +227,9 @@ <h2 id="args">Args</h2>
             url_verification_enabled: False if you would like to disable the built-in middleware (Default: True).
                 `UrlVerification` is a built-in middleware that handles url_verification requests
                 that verify the endpoint for Events API in HTTP Mode requests.
+            attaching_function_token_enabled: False if you would like to disable the built-in middleware (Default: True).
+                `AttachingFunctionToken` is a built-in middleware that injects the just-in-time workflow-execution tokens
+                when your app receives `function_executed` or interactivity events scoped to a custom step.
             ssl_check_enabled: bool = False if you would like to disable the built-in middleware (Default: True).
                 `SslCheck` is a built-in middleware that handles ssl_check requests from Slack.
             oauth_settings: The settings related to Slack app installation flow (OAuth flow)
@@ -396,6 +404,7 @@ <h2 id="args">Args</h2>
             ignoring_self_events_enabled=ignoring_self_events_enabled,
             ssl_check_enabled=ssl_check_enabled,
             url_verification_enabled=url_verification_enabled,
+            attaching_function_token_enabled=attaching_function_token_enabled,
             user_facing_authorize_error_message=user_facing_authorize_error_message,
         )
 
@@ -406,6 +415,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         user_facing_authorize_error_message: Optional[str] = None,
     ):
         if self._init_middleware_list_done:
@@ -463,6 +473,8 @@ <h2 id="args">Args</h2>
             self._middleware_list.append(IgnoringSelfEvents(base_logger=self._base_logger))
         if url_verification_enabled is True:
             self._middleware_list.append(UrlVerification(base_logger=self._base_logger))
+        if attaching_function_token_enabled is True:
+            self._middleware_list.append(AttachingFunctionToken())
         self._init_middleware_list_done = True
 
     # -------------------------
@@ -695,7 +707,7 @@ <h2 id="args">Args</h2>
         return None
 
     # -------------------------
-    # Workflows: Steps from Apps
+    # Workflows: Steps from apps
 
     def step(
         self,
@@ -706,13 +718,13 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
-        Registers a new Workflow Step listener.
+        Registers a new step from app listener.
 
         Unlike others, this method doesn&#39;t behave as a decorator.
-        If you want to register a workflow step by a decorator, use `WorkflowStepBuilder`&#39;s methods.
+        If you want to register a step from app by a decorator, use `WorkflowStepBuilder`&#39;s methods.
 
             # Create a new WorkflowStep instance
             from slack_bolt.workflows.step import WorkflowStep
@@ -725,7 +737,7 @@ <h2 id="args">Args</h2>
             # Pass Step to set up listeners
             app.step(ws)
 
-        Refer to https://api.slack.com/workflows/steps for details of Steps from Apps.
+        Refer to https://api.slack.com/workflows/steps for details of steps from apps.
 
         To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`&#39;s API document.
 
@@ -734,14 +746,14 @@ <h2 id="args">Args</h2>
         refer to `slack_bolt.workflows.step.utilities` API documents.
 
         Args:
-            callback_id: The Callback ID for this workflow step
+            callback_id: The Callback ID for this step from app
             edit: The function for displaying a modal in the Workflow Builder
             save: The function for handling configuration in the Workflow Builder
             execute: The function for handling the step execution
         &#34;&#34;&#34;
         warnings.warn(
             (
-                &#34;Steps from Apps for legacy workflows are now deprecated. &#34;
+                &#34;Steps from apps for legacy workflows are now deprecated. &#34;
                 &#34;Use new custom steps: https://api.slack.com/automation/functions/custom-bolt&#34;
             ),
             category=DeprecationWarning,
@@ -897,6 +909,49 @@ <h2 id="args">Args</h2>
 
         return __call__
 
+    def function(
+        self,
+        callback_id: Union[str, Pattern],
+        matchers: Optional[Sequence[Callable[..., bool]]] = None,
+        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
+    ) -&gt; Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
+        &#34;&#34;&#34;Registers a new Function listener.
+        This method can be used as either a decorator or a method.
+
+            # Use this method as a decorator
+            @app.function(&#34;reverse&#34;)
+            def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
+                try:
+                    ack()
+                    string_to_reverse = inputs[&#34;stringToReverse&#34;]
+                    complete(outputs={&#34;reverseString&#34;: string_to_reverse[::-1]})
+                except Exception as e:
+                    fail(f&#34;Cannot reverse string (error: {e})&#34;)
+                    raise e
+
+            # Pass a function to this method
+            app.function(&#34;reverse&#34;)(reverse_string)
+
+        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`&#39;s API document.
+
+        Args:
+            callback_id: The callback id to identify the function
+            matchers: A list of listener matcher functions.
+                Only when all the matchers return True, the listener function can be invoked.
+            middleware: A list of lister middleware functions.
+                Only when all the middleware call `next()` method, the listener function can be invoked.
+        &#34;&#34;&#34;
+
+        matchers = list(matchers) if matchers else []
+        middleware = list(middleware) if middleware else []
+
+        def __call__(*args, **kwargs):
+            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
+            primary_matcher = builtin_matchers.function_executed(callback_id=callback_id, base_logger=self._base_logger)
+            return self._register_listener(functions, primary_matcher, matchers, middleware, True)
+
+        return __call__
+
     # -------------------------
     # slash commands
 
@@ -1666,6 +1721,39 @@ <h2 id="args">Args</h2>
 Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
 </dl></div>
 </dd>
+<dt id="slack_bolt.app.app.App.function"><code class="name flex">
+<span>def <span class="ident">function</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[<a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
+</code></dt>
+<dd>
+<div class="desc"><p>Registers a new Function listener.
+This method can be used as either a decorator or a method.</p>
+<pre><code># Use this method as a decorator
+@app.function("reverse")
+def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
+    try:
+        ack()
+        string_to_reverse = inputs["stringToReverse"]
+        complete(outputs={"reverseString": string_to_reverse[::-1]})
+    except Exception as e:
+        fail(f"Cannot reverse string (error: {e})")
+        raise e
+
+# Pass a function to this method
+app.function("reverse")(reverse_string)
+</code></pre>
+<p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.args" href="../kwargs_injection/args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.</p>
+<h2 id="args">Args</h2>
+<dl>
+<dt><strong><code>callback_id</code></strong></dt>
+<dd>The callback id to identify the function</dd>
+<dt><strong><code>matchers</code></strong></dt>
+<dd>A list of listener matcher functions.
+Only when all the matchers return True, the listener function can be invoked.</dd>
+<dt><strong><code>middleware</code></strong></dt>
+<dd>A list of lister middleware functions.
+Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
+</dl></div>
+</dd>
 <dt id="slack_bolt.app.app.App.global_shortcut"><code class="name flex">
 <span>def <span class="ident">global_shortcut</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[<a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
 </code></dt>
@@ -1832,11 +1920,11 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
-<p>Registers a new Workflow Step listener.</p>
+<p>Registers a new step from app listener.</p>
 <p>Unlike others, this method doesn't behave as a decorator.
-If you want to register a workflow step by a decorator, use <code>WorkflowStepBuilder</code>'s methods.</p>
+If you want to register a step from app by a decorator, use <code>WorkflowStepBuilder</code>'s methods.</p>
 <pre><code># Create a new WorkflowStep instance
 from slack_bolt.workflows.step import WorkflowStep
 ws = WorkflowStep(
@@ -1848,7 +1936,7 @@ <h2 id="args">Args</h2>
 # Pass Step to set up listeners
 app.step(ws)
 </code></pre>
-<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of Steps from Apps.</p>
+<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of steps from apps.</p>
 <p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.args" href="../kwargs_injection/args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.</p>
 <p>For further information about WorkflowStep specific function arguments
 such as <code>configure</code>, <code>update</code>, <code>complete</code>, and <code>fail</code>,
@@ -1856,7 +1944,7 @@ <h2 id="args">Args</h2>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The Callback ID for this workflow step</dd>
+<dd>The Callback ID for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>The function for displaying a modal in the Workflow Builder</dd>
 <dt><strong><code>save</code></strong></dt>
@@ -2125,6 +2213,7 @@ <h4><code><a title="slack_bolt.app.app.App" href="#slack_bolt.app.app.App">App</
 <li><code><a title="slack_bolt.app.app.App.enable_token_revocation_listeners" href="#slack_bolt.app.app.App.enable_token_revocation_listeners">enable_token_revocation_listeners</a></code></li>
 <li><code><a title="slack_bolt.app.app.App.error" href="#slack_bolt.app.app.App.error">error</a></code></li>
 <li><code><a title="slack_bolt.app.app.App.event" href="#slack_bolt.app.app.App.event">event</a></code></li>
+<li><code><a title="slack_bolt.app.app.App.function" href="#slack_bolt.app.app.App.function">function</a></code></li>
 <li><code><a title="slack_bolt.app.app.App.global_shortcut" href="#slack_bolt.app.app.App.global_shortcut">global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.app.app.App.installation_store" href="#slack_bolt.app.app.App.installation_store">installation_store</a></code></li>
 <li><code><a title="slack_bolt.app.app.App.listener_runner" href="#slack_bolt.app.app.App.listener_runner">listener_runner</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/app/async_app.html b/docs/static/api-docs/slack_bolt/app/async_app.html
index 104b14381..cc1cabe0e 100644
--- a/docs/static/api-docs/slack_bolt/app/async_app.html
+++ b/docs/static/api-docs/slack_bolt/app/async_app.html
@@ -37,7 +37,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
 <dt id="slack_bolt.app.async_app.AsyncApp"><code class="flex name class">
 <span>class <span class="ident">AsyncApp</span></span>
-<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, client: Optional[slack_sdk.web.async_client.AsyncWebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>, Callable[..., Awaitable[Any]], ForwardRef(None)] = None, authorize: Optional[Callable[..., Awaitable[<a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="../authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.async_installation_store.AsyncInstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings" href="../oauth/async_oauth_settings.html#slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings">AsyncOAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow" href="../oauth/async_oauth_flow.html#slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow">AsyncOAuthFlow</a>] = None, verification_token: Optional[str] = None)</span>
+<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, client: Optional[slack_sdk.web.async_client.AsyncWebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>, Callable[..., Awaitable[Any]], ForwardRef(None)] = None, authorize: Optional[Callable[..., Awaitable[<a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="../authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.async_installation_store.AsyncInstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, attaching_function_token_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings" href="../oauth/async_oauth_settings.html#slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings">AsyncOAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow" href="../oauth/async_oauth_flow.html#slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow">AsyncOAuthFlow</a>] = None, verification_token: Optional[str] = None)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>Bolt App that provides functionalities to register middleware/listeners.</p>
@@ -112,6 +112,10 @@ <h2 id="args">Args</h2>
 <dt><strong><code>ssl_check_enabled</code></strong></dt>
 <dd>bool = False if you would like to disable the built-in middleware (Default: True).
 <code>AsyncSslCheck</code> is a built-in middleware that handles ssl_check requests from Slack.</dd>
+<dt><strong><code>attaching_function_token_enabled</code></strong></dt>
+<dd>False if you would like to disable the built-in middleware (Default: True).
+<code>AsyncAttachingFunctionToken</code> is a built-in middleware that injects the just-in-time workflow-execution token
+when your app receives <code>function_executed</code> or interactivity events scoped to a custom step.</dd>
 <dt><strong><code>oauth_settings</code></strong></dt>
 <dd>The settings related to Slack app installation flow (OAuth flow)</dd>
 <dt><strong><code>oauth_flow</code></strong></dt>
@@ -151,6 +155,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         # for the OAuth flow
         oauth_settings: Optional[AsyncOAuthSettings] = None,
         oauth_flow: Optional[AsyncOAuthFlow] = None,
@@ -215,6 +220,9 @@ <h2 id="args">Args</h2>
                 that verify the endpoint for Events API in HTTP Mode requests.
             ssl_check_enabled: bool = False if you would like to disable the built-in middleware (Default: True).
                 `AsyncSslCheck` is a built-in middleware that handles ssl_check requests from Slack.
+            attaching_function_token_enabled: False if you would like to disable the built-in middleware (Default: True).
+                `AsyncAttachingFunctionToken` is a built-in middleware that injects the just-in-time workflow-execution token
+                when your app receives `function_executed` or interactivity events scoped to a custom step.
             oauth_settings: The settings related to Slack app installation flow (OAuth flow)
             oauth_flow: Instantiated `slack_bolt.oauth.AsyncOAuthFlow`. This is always prioritized over oauth_settings.
             verification_token: Deprecated verification mechanism. This can used only for ssl_check requests.
@@ -385,6 +393,7 @@ <h2 id="args">Args</h2>
             ignoring_self_events_enabled=ignoring_self_events_enabled,
             ssl_check_enabled=ssl_check_enabled,
             url_verification_enabled=url_verification_enabled,
+            attaching_function_token_enabled=attaching_function_token_enabled,
             user_facing_authorize_error_message=user_facing_authorize_error_message,
         )
 
@@ -396,6 +405,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         user_facing_authorize_error_message: Optional[str] = None,
     ):
         if self._init_middleware_list_done:
@@ -446,6 +456,8 @@ <h2 id="args">Args</h2>
             self._async_middleware_list.append(AsyncIgnoringSelfEvents(base_logger=self._base_logger))
         if url_verification_enabled is True:
             self._async_middleware_list.append(AsyncUrlVerification(base_logger=self._base_logger))
+        if attaching_function_token_enabled is True:
+            self._async_middleware_list.append(AsyncAttachingFunctionToken())
         self._init_middleware_list_done = True
 
     # -------------------------
@@ -707,7 +719,7 @@ <h2 id="args">Args</h2>
         return None
 
     # -------------------------
-    # Workflows: Steps from Apps
+    # Workflows: Steps from apps
 
     def step(
         self,
@@ -718,13 +730,13 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
-        Registers a new Workflow Step listener.
+        Registers a new step from app listener.
 
         Unlike others, this method doesn&#39;t behave as a decorator.
-        If you want to register a workflow step by a decorator, use `AsyncWorkflowStepBuilder`&#39;s methods.
+        If you want to register a step from app by a decorator, use `AsyncWorkflowStepBuilder`&#39;s methods.
 
             # Create a new WorkflowStep instance
             from slack_bolt.workflows.async_step import AsyncWorkflowStep
@@ -737,7 +749,7 @@ <h2 id="args">Args</h2>
             # Pass Step to set up listeners
             app.step(ws)
 
-        Refer to https://api.slack.com/workflows/steps for details of Steps from Apps.
+        Refer to https://api.slack.com/workflows/steps for details of steps from apps.
 
         To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.async_args`&#39;s API document.
         For further information about AsyncWorkflowStep specific function arguments
@@ -745,14 +757,14 @@ <h2 id="args">Args</h2>
         refer to the `async` prefixed ones in `slack_bolt.workflows.step.utilities` API documents.
 
         Args:
-            callback_id: The Callback ID for this workflow step
+            callback_id: The Callback ID for this step from app
             edit: The function for displaying a modal in the Workflow Builder
             save: The function for handling configuration in the Workflow Builder
             execute: The function for handling the step execution
         &#34;&#34;&#34;
         warnings.warn(
             (
-                &#34;Steps from Apps for legacy workflows are now deprecated. &#34;
+                &#34;Steps from apps for legacy workflows are now deprecated. &#34;
                 &#34;Use new custom steps: https://api.slack.com/automation/functions/custom-bolt&#34;
             ),
             category=DeprecationWarning,
@@ -916,6 +928,51 @@ <h2 id="args">Args</h2>
 
         return __call__
 
+    def function(
+        self,
+        callback_id: Union[str, Pattern],
+        matchers: Optional[Sequence[Callable[..., Awaitable[bool]]]] = None,
+        middleware: Optional[Sequence[Union[Callable, AsyncMiddleware]]] = None,
+    ) -&gt; Callable[..., Optional[Callable[..., Awaitable[BoltResponse]]]]:
+        &#34;&#34;&#34;Registers a new Function listener.
+        This method can be used as either a decorator or a method.
+
+            # Use this method as a decorator
+            @app.function(&#34;reverse&#34;)
+            async def reverse_string(ack: AsyncAck, inputs: dict, complete: AsyncComplete, fail: AsyncFail):
+                try:
+                    await ack()
+                    string_to_reverse = inputs[&#34;stringToReverse&#34;]
+                    await complete({&#34;reverseString&#34;: string_to_reverse[::-1]})
+                except Exception as e:
+                    await fail(f&#34;Cannot reverse string (error: {e})&#34;)
+                    raise e
+
+            # Pass a function to this method
+            app.function(&#34;reverse&#34;)(reverse_string)
+
+        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.async_args`&#39;s API document.
+
+        Args:
+            callback_id: The callback id to identify the function
+            matchers: A list of listener matcher functions.
+                Only when all the matchers return True, the listener function can be invoked.
+            middleware: A list of lister middleware functions.
+                Only when all the middleware call `next()` method, the listener function can be invoked.
+        &#34;&#34;&#34;
+
+        matchers = list(matchers) if matchers else []
+        middleware = list(middleware) if middleware else []
+
+        def __call__(*args, **kwargs):
+            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
+            primary_matcher = builtin_matchers.function_executed(
+                callback_id=callback_id, base_logger=self._base_logger, asyncio=True
+            )
+            return self._register_listener(functions, primary_matcher, matchers, middleware, True)
+
+        return __call__
+
     # -------------------------
     # slash commands
 
@@ -1702,6 +1759,39 @@ <h2 id="args">Args</h2>
 Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
 </dl></div>
 </dd>
+<dt id="slack_bolt.app.async_app.AsyncApp.function"><code class="name flex">
+<span>def <span class="ident">function</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., Awaitable[bool]]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Awaitable[<a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
+</code></dt>
+<dd>
+<div class="desc"><p>Registers a new Function listener.
+This method can be used as either a decorator or a method.</p>
+<pre><code># Use this method as a decorator
+@app.function("reverse")
+async def reverse_string(ack: AsyncAck, inputs: dict, complete: AsyncComplete, fail: AsyncFail):
+    try:
+        await ack()
+        string_to_reverse = inputs["stringToReverse"]
+        await complete({"reverseString": string_to_reverse[::-1]})
+    except Exception as e:
+        await fail(f"Cannot reverse string (error: {e})")
+        raise e
+
+# Pass a function to this method
+app.function("reverse")(reverse_string)
+</code></pre>
+<p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.async_args" href="../kwargs_injection/async_args.html">slack_bolt.kwargs_injection.async_args</a></code>'s API document.</p>
+<h2 id="args">Args</h2>
+<dl>
+<dt><strong><code>callback_id</code></strong></dt>
+<dd>The callback id to identify the function</dd>
+<dt><strong><code>matchers</code></strong></dt>
+<dd>A list of listener matcher functions.
+Only when all the matchers return True, the listener function can be invoked.</dd>
+<dt><strong><code>middleware</code></strong></dt>
+<dd>A list of lister middleware functions.
+Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
+</dl></div>
+</dd>
 <dt id="slack_bolt.app.async_app.AsyncApp.global_shortcut"><code class="name flex">
 <span>def <span class="ident">global_shortcut</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., Awaitable[bool]]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Awaitable[Optional[<a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]]</span>
 </code></dt>
@@ -1878,11 +1968,11 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
-<p>Registers a new Workflow Step listener.</p>
+<p>Registers a new step from app listener.</p>
 <p>Unlike others, this method doesn't behave as a decorator.
-If you want to register a workflow step by a decorator, use <code>AsyncWorkflowStepBuilder</code>'s methods.</p>
+If you want to register a step from app by a decorator, use <code>AsyncWorkflowStepBuilder</code>'s methods.</p>
 <pre><code># Create a new WorkflowStep instance
 from slack_bolt.workflows.async_step import AsyncWorkflowStep
 ws = AsyncWorkflowStep(
@@ -1894,7 +1984,7 @@ <h2 id="args">Args</h2>
 # Pass Step to set up listeners
 app.step(ws)
 </code></pre>
-<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of Steps from Apps.</p>
+<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of steps from apps.</p>
 <p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.async_args" href="../kwargs_injection/async_args.html">slack_bolt.kwargs_injection.async_args</a></code>'s API document.
 For further information about AsyncWorkflowStep specific function arguments
 such as <code>configure</code>, <code>update</code>, <code>complete</code>, and <code>fail</code>,
@@ -1902,7 +1992,7 @@ <h2 id="args">Args</h2>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The Callback ID for this workflow step</dd>
+<dd>The Callback ID for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>The function for displaying a modal in the Workflow Builder</dd>
 <dt><strong><code>save</code></strong></dt>
@@ -2033,6 +2123,7 @@ <h4><code><a title="slack_bolt.app.async_app.AsyncApp" href="#slack_bolt.app.asy
 <li><code><a title="slack_bolt.app.async_app.AsyncApp.enable_token_revocation_listeners" href="#slack_bolt.app.async_app.AsyncApp.enable_token_revocation_listeners">enable_token_revocation_listeners</a></code></li>
 <li><code><a title="slack_bolt.app.async_app.AsyncApp.error" href="#slack_bolt.app.async_app.AsyncApp.error">error</a></code></li>
 <li><code><a title="slack_bolt.app.async_app.AsyncApp.event" href="#slack_bolt.app.async_app.AsyncApp.event">event</a></code></li>
+<li><code><a title="slack_bolt.app.async_app.AsyncApp.function" href="#slack_bolt.app.async_app.AsyncApp.function">function</a></code></li>
 <li><code><a title="slack_bolt.app.async_app.AsyncApp.global_shortcut" href="#slack_bolt.app.async_app.AsyncApp.global_shortcut">global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.app.async_app.AsyncApp.installation_store" href="#slack_bolt.app.async_app.AsyncApp.installation_store">installation_store</a></code></li>
 <li><code><a title="slack_bolt.app.async_app.AsyncApp.listener_runner" href="#slack_bolt.app.async_app.AsyncApp.listener_runner">listener_runner</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/app/index.html b/docs/static/api-docs/slack_bolt/app/index.html
index 9d13ea04a..8f3a67ca0 100644
--- a/docs/static/api-docs/slack_bolt/app/index.html
+++ b/docs/static/api-docs/slack_bolt/app/index.html
@@ -56,7 +56,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
 <dt id="slack_bolt.app.App"><code class="flex name class">
 <span>class <span class="ident">App</span></span>
-<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="../authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="../oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="../oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a>] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None)</span>
+<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="../authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, attaching_function_token_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="../oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="../oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a>] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>Bolt App that provides functionalities to register middleware/listeners.</p>
@@ -130,6 +130,10 @@ <h2 id="args">Args</h2>
 <dd>False if you would like to disable the built-in middleware (Default: True).
 <code>UrlVerification</code> is a built-in middleware that handles url_verification requests
 that verify the endpoint for Events API in HTTP Mode requests.</dd>
+<dt><strong><code>attaching_function_token_enabled</code></strong></dt>
+<dd>False if you would like to disable the built-in middleware (Default: True).
+<code>AttachingFunctionToken</code> is a built-in middleware that injects the just-in-time workflow-execution tokens
+when your app receives <code>function_executed</code> or interactivity events scoped to a custom step.</dd>
 <dt><strong><code>ssl_check_enabled</code></strong></dt>
 <dd>bool = False if you would like to disable the built-in middleware (Default: True).
 <code>SslCheck</code> is a built-in middleware that handles ssl_check requests from Slack.</dd>
@@ -176,6 +180,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         # for the OAuth flow
         oauth_settings: Optional[OAuthSettings] = None,
         oauth_flow: Optional[OAuthFlow] = None,
@@ -241,6 +246,9 @@ <h2 id="args">Args</h2>
             url_verification_enabled: False if you would like to disable the built-in middleware (Default: True).
                 `UrlVerification` is a built-in middleware that handles url_verification requests
                 that verify the endpoint for Events API in HTTP Mode requests.
+            attaching_function_token_enabled: False if you would like to disable the built-in middleware (Default: True).
+                `AttachingFunctionToken` is a built-in middleware that injects the just-in-time workflow-execution tokens
+                when your app receives `function_executed` or interactivity events scoped to a custom step.
             ssl_check_enabled: bool = False if you would like to disable the built-in middleware (Default: True).
                 `SslCheck` is a built-in middleware that handles ssl_check requests from Slack.
             oauth_settings: The settings related to Slack app installation flow (OAuth flow)
@@ -415,6 +423,7 @@ <h2 id="args">Args</h2>
             ignoring_self_events_enabled=ignoring_self_events_enabled,
             ssl_check_enabled=ssl_check_enabled,
             url_verification_enabled=url_verification_enabled,
+            attaching_function_token_enabled=attaching_function_token_enabled,
             user_facing_authorize_error_message=user_facing_authorize_error_message,
         )
 
@@ -425,6 +434,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         user_facing_authorize_error_message: Optional[str] = None,
     ):
         if self._init_middleware_list_done:
@@ -482,6 +492,8 @@ <h2 id="args">Args</h2>
             self._middleware_list.append(IgnoringSelfEvents(base_logger=self._base_logger))
         if url_verification_enabled is True:
             self._middleware_list.append(UrlVerification(base_logger=self._base_logger))
+        if attaching_function_token_enabled is True:
+            self._middleware_list.append(AttachingFunctionToken())
         self._init_middleware_list_done = True
 
     # -------------------------
@@ -714,7 +726,7 @@ <h2 id="args">Args</h2>
         return None
 
     # -------------------------
-    # Workflows: Steps from Apps
+    # Workflows: Steps from apps
 
     def step(
         self,
@@ -725,13 +737,13 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
-        Registers a new Workflow Step listener.
+        Registers a new step from app listener.
 
         Unlike others, this method doesn&#39;t behave as a decorator.
-        If you want to register a workflow step by a decorator, use `WorkflowStepBuilder`&#39;s methods.
+        If you want to register a step from app by a decorator, use `WorkflowStepBuilder`&#39;s methods.
 
             # Create a new WorkflowStep instance
             from slack_bolt.workflows.step import WorkflowStep
@@ -744,7 +756,7 @@ <h2 id="args">Args</h2>
             # Pass Step to set up listeners
             app.step(ws)
 
-        Refer to https://api.slack.com/workflows/steps for details of Steps from Apps.
+        Refer to https://api.slack.com/workflows/steps for details of steps from apps.
 
         To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`&#39;s API document.
 
@@ -753,14 +765,14 @@ <h2 id="args">Args</h2>
         refer to `slack_bolt.workflows.step.utilities` API documents.
 
         Args:
-            callback_id: The Callback ID for this workflow step
+            callback_id: The Callback ID for this step from app
             edit: The function for displaying a modal in the Workflow Builder
             save: The function for handling configuration in the Workflow Builder
             execute: The function for handling the step execution
         &#34;&#34;&#34;
         warnings.warn(
             (
-                &#34;Steps from Apps for legacy workflows are now deprecated. &#34;
+                &#34;Steps from apps for legacy workflows are now deprecated. &#34;
                 &#34;Use new custom steps: https://api.slack.com/automation/functions/custom-bolt&#34;
             ),
             category=DeprecationWarning,
@@ -916,6 +928,49 @@ <h2 id="args">Args</h2>
 
         return __call__
 
+    def function(
+        self,
+        callback_id: Union[str, Pattern],
+        matchers: Optional[Sequence[Callable[..., bool]]] = None,
+        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
+    ) -&gt; Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
+        &#34;&#34;&#34;Registers a new Function listener.
+        This method can be used as either a decorator or a method.
+
+            # Use this method as a decorator
+            @app.function(&#34;reverse&#34;)
+            def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
+                try:
+                    ack()
+                    string_to_reverse = inputs[&#34;stringToReverse&#34;]
+                    complete(outputs={&#34;reverseString&#34;: string_to_reverse[::-1]})
+                except Exception as e:
+                    fail(f&#34;Cannot reverse string (error: {e})&#34;)
+                    raise e
+
+            # Pass a function to this method
+            app.function(&#34;reverse&#34;)(reverse_string)
+
+        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`&#39;s API document.
+
+        Args:
+            callback_id: The callback id to identify the function
+            matchers: A list of listener matcher functions.
+                Only when all the matchers return True, the listener function can be invoked.
+            middleware: A list of lister middleware functions.
+                Only when all the middleware call `next()` method, the listener function can be invoked.
+        &#34;&#34;&#34;
+
+        matchers = list(matchers) if matchers else []
+        middleware = list(middleware) if middleware else []
+
+        def __call__(*args, **kwargs):
+            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
+            primary_matcher = builtin_matchers.function_executed(callback_id=callback_id, base_logger=self._base_logger)
+            return self._register_listener(functions, primary_matcher, matchers, middleware, True)
+
+        return __call__
+
     # -------------------------
     # slash commands
 
@@ -1685,6 +1740,39 @@ <h2 id="args">Args</h2>
 Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
 </dl></div>
 </dd>
+<dt id="slack_bolt.app.App.function"><code class="name flex">
+<span>def <span class="ident">function</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[<a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
+</code></dt>
+<dd>
+<div class="desc"><p>Registers a new Function listener.
+This method can be used as either a decorator or a method.</p>
+<pre><code># Use this method as a decorator
+@app.function("reverse")
+def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
+    try:
+        ack()
+        string_to_reverse = inputs["stringToReverse"]
+        complete(outputs={"reverseString": string_to_reverse[::-1]})
+    except Exception as e:
+        fail(f"Cannot reverse string (error: {e})")
+        raise e
+
+# Pass a function to this method
+app.function("reverse")(reverse_string)
+</code></pre>
+<p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.args" href="../kwargs_injection/args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.</p>
+<h2 id="args">Args</h2>
+<dl>
+<dt><strong><code>callback_id</code></strong></dt>
+<dd>The callback id to identify the function</dd>
+<dt><strong><code>matchers</code></strong></dt>
+<dd>A list of listener matcher functions.
+Only when all the matchers return True, the listener function can be invoked.</dd>
+<dt><strong><code>middleware</code></strong></dt>
+<dd>A list of lister middleware functions.
+Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
+</dl></div>
+</dd>
 <dt id="slack_bolt.app.App.global_shortcut"><code class="name flex">
 <span>def <span class="ident">global_shortcut</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.middleware.Middleware" href="../middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[<a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
 </code></dt>
@@ -1851,11 +1939,11 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
-<p>Registers a new Workflow Step listener.</p>
+<p>Registers a new step from app listener.</p>
 <p>Unlike others, this method doesn't behave as a decorator.
-If you want to register a workflow step by a decorator, use <code>WorkflowStepBuilder</code>'s methods.</p>
+If you want to register a step from app by a decorator, use <code>WorkflowStepBuilder</code>'s methods.</p>
 <pre><code># Create a new WorkflowStep instance
 from slack_bolt.workflows.step import WorkflowStep
 ws = WorkflowStep(
@@ -1867,7 +1955,7 @@ <h2 id="args">Args</h2>
 # Pass Step to set up listeners
 app.step(ws)
 </code></pre>
-<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of Steps from Apps.</p>
+<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of steps from apps.</p>
 <p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.args" href="../kwargs_injection/args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.</p>
 <p>For further information about WorkflowStep specific function arguments
 such as <code>configure</code>, <code>update</code>, <code>complete</code>, and <code>fail</code>,
@@ -1875,7 +1963,7 @@ <h2 id="args">Args</h2>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The Callback ID for this workflow step</dd>
+<dd>The Callback ID for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>The function for displaying a modal in the Workflow Builder</dd>
 <dt><strong><code>save</code></strong></dt>
@@ -1987,6 +2075,7 @@ <h4><code><a title="slack_bolt.app.App" href="#slack_bolt.app.App">App</a></code
 <li><code><a title="slack_bolt.app.App.enable_token_revocation_listeners" href="#slack_bolt.app.App.enable_token_revocation_listeners">enable_token_revocation_listeners</a></code></li>
 <li><code><a title="slack_bolt.app.App.error" href="#slack_bolt.app.App.error">error</a></code></li>
 <li><code><a title="slack_bolt.app.App.event" href="#slack_bolt.app.App.event">event</a></code></li>
+<li><code><a title="slack_bolt.app.App.function" href="#slack_bolt.app.App.function">function</a></code></li>
 <li><code><a title="slack_bolt.app.App.global_shortcut" href="#slack_bolt.app.App.global_shortcut">global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.app.App.installation_store" href="#slack_bolt.app.App.installation_store">installation_store</a></code></li>
 <li><code><a title="slack_bolt.app.App.listener_runner" href="#slack_bolt.app.App.listener_runner">listener_runner</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/async_app.html b/docs/static/api-docs/slack_bolt/async_app.html
index 70921de7f..cb7e64187 100644
--- a/docs/static/api-docs/slack_bolt/async_app.html
+++ b/docs/static/api-docs/slack_bolt/async_app.html
@@ -128,7 +128,7 @@ <h3>Class variables</h3>
 </dd>
 <dt id="slack_bolt.async_app.AsyncApp"><code class="flex name class">
 <span>class <span class="ident">AsyncApp</span></span>
-<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, client: Optional[slack_sdk.web.async_client.AsyncWebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>, Callable[..., Awaitable[Any]], ForwardRef(None)] = None, authorize: Optional[Callable[..., Awaitable[<a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.async_installation_store.AsyncInstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings" href="oauth/async_oauth_settings.html#slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings">AsyncOAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow" href="oauth/async_oauth_flow.html#slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow">AsyncOAuthFlow</a>] = None, verification_token: Optional[str] = None)</span>
+<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, client: Optional[slack_sdk.web.async_client.AsyncWebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>, Callable[..., Awaitable[Any]], ForwardRef(None)] = None, authorize: Optional[Callable[..., Awaitable[<a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.async_installation_store.AsyncInstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, attaching_function_token_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings" href="oauth/async_oauth_settings.html#slack_bolt.oauth.async_oauth_settings.AsyncOAuthSettings">AsyncOAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow" href="oauth/async_oauth_flow.html#slack_bolt.oauth.async_oauth_flow.AsyncOAuthFlow">AsyncOAuthFlow</a>] = None, verification_token: Optional[str] = None)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>Bolt App that provides functionalities to register middleware/listeners.</p>
@@ -203,6 +203,10 @@ <h2 id="args">Args</h2>
 <dt><strong><code>ssl_check_enabled</code></strong></dt>
 <dd>bool = False if you would like to disable the built-in middleware (Default: True).
 <code>AsyncSslCheck</code> is a built-in middleware that handles ssl_check requests from Slack.</dd>
+<dt><strong><code>attaching_function_token_enabled</code></strong></dt>
+<dd>False if you would like to disable the built-in middleware (Default: True).
+<code>AsyncAttachingFunctionToken</code> is a built-in middleware that injects the just-in-time workflow-execution token
+when your app receives <code>function_executed</code> or interactivity events scoped to a custom step.</dd>
 <dt><strong><code>oauth_settings</code></strong></dt>
 <dd>The settings related to Slack app installation flow (OAuth flow)</dd>
 <dt><strong><code>oauth_flow</code></strong></dt>
@@ -242,6 +246,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         # for the OAuth flow
         oauth_settings: Optional[AsyncOAuthSettings] = None,
         oauth_flow: Optional[AsyncOAuthFlow] = None,
@@ -306,6 +311,9 @@ <h2 id="args">Args</h2>
                 that verify the endpoint for Events API in HTTP Mode requests.
             ssl_check_enabled: bool = False if you would like to disable the built-in middleware (Default: True).
                 `AsyncSslCheck` is a built-in middleware that handles ssl_check requests from Slack.
+            attaching_function_token_enabled: False if you would like to disable the built-in middleware (Default: True).
+                `AsyncAttachingFunctionToken` is a built-in middleware that injects the just-in-time workflow-execution token
+                when your app receives `function_executed` or interactivity events scoped to a custom step.
             oauth_settings: The settings related to Slack app installation flow (OAuth flow)
             oauth_flow: Instantiated `slack_bolt.oauth.AsyncOAuthFlow`. This is always prioritized over oauth_settings.
             verification_token: Deprecated verification mechanism. This can used only for ssl_check requests.
@@ -476,6 +484,7 @@ <h2 id="args">Args</h2>
             ignoring_self_events_enabled=ignoring_self_events_enabled,
             ssl_check_enabled=ssl_check_enabled,
             url_verification_enabled=url_verification_enabled,
+            attaching_function_token_enabled=attaching_function_token_enabled,
             user_facing_authorize_error_message=user_facing_authorize_error_message,
         )
 
@@ -487,6 +496,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         user_facing_authorize_error_message: Optional[str] = None,
     ):
         if self._init_middleware_list_done:
@@ -537,6 +547,8 @@ <h2 id="args">Args</h2>
             self._async_middleware_list.append(AsyncIgnoringSelfEvents(base_logger=self._base_logger))
         if url_verification_enabled is True:
             self._async_middleware_list.append(AsyncUrlVerification(base_logger=self._base_logger))
+        if attaching_function_token_enabled is True:
+            self._async_middleware_list.append(AsyncAttachingFunctionToken())
         self._init_middleware_list_done = True
 
     # -------------------------
@@ -798,7 +810,7 @@ <h2 id="args">Args</h2>
         return None
 
     # -------------------------
-    # Workflows: Steps from Apps
+    # Workflows: Steps from apps
 
     def step(
         self,
@@ -809,13 +821,13 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
-        Registers a new Workflow Step listener.
+        Registers a new step from app listener.
 
         Unlike others, this method doesn&#39;t behave as a decorator.
-        If you want to register a workflow step by a decorator, use `AsyncWorkflowStepBuilder`&#39;s methods.
+        If you want to register a step from app by a decorator, use `AsyncWorkflowStepBuilder`&#39;s methods.
 
             # Create a new WorkflowStep instance
             from slack_bolt.workflows.async_step import AsyncWorkflowStep
@@ -828,7 +840,7 @@ <h2 id="args">Args</h2>
             # Pass Step to set up listeners
             app.step(ws)
 
-        Refer to https://api.slack.com/workflows/steps for details of Steps from Apps.
+        Refer to https://api.slack.com/workflows/steps for details of steps from apps.
 
         To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.async_args`&#39;s API document.
         For further information about AsyncWorkflowStep specific function arguments
@@ -836,14 +848,14 @@ <h2 id="args">Args</h2>
         refer to the `async` prefixed ones in `slack_bolt.workflows.step.utilities` API documents.
 
         Args:
-            callback_id: The Callback ID for this workflow step
+            callback_id: The Callback ID for this step from app
             edit: The function for displaying a modal in the Workflow Builder
             save: The function for handling configuration in the Workflow Builder
             execute: The function for handling the step execution
         &#34;&#34;&#34;
         warnings.warn(
             (
-                &#34;Steps from Apps for legacy workflows are now deprecated. &#34;
+                &#34;Steps from apps for legacy workflows are now deprecated. &#34;
                 &#34;Use new custom steps: https://api.slack.com/automation/functions/custom-bolt&#34;
             ),
             category=DeprecationWarning,
@@ -1007,6 +1019,51 @@ <h2 id="args">Args</h2>
 
         return __call__
 
+    def function(
+        self,
+        callback_id: Union[str, Pattern],
+        matchers: Optional[Sequence[Callable[..., Awaitable[bool]]]] = None,
+        middleware: Optional[Sequence[Union[Callable, AsyncMiddleware]]] = None,
+    ) -&gt; Callable[..., Optional[Callable[..., Awaitable[BoltResponse]]]]:
+        &#34;&#34;&#34;Registers a new Function listener.
+        This method can be used as either a decorator or a method.
+
+            # Use this method as a decorator
+            @app.function(&#34;reverse&#34;)
+            async def reverse_string(ack: AsyncAck, inputs: dict, complete: AsyncComplete, fail: AsyncFail):
+                try:
+                    await ack()
+                    string_to_reverse = inputs[&#34;stringToReverse&#34;]
+                    await complete({&#34;reverseString&#34;: string_to_reverse[::-1]})
+                except Exception as e:
+                    await fail(f&#34;Cannot reverse string (error: {e})&#34;)
+                    raise e
+
+            # Pass a function to this method
+            app.function(&#34;reverse&#34;)(reverse_string)
+
+        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.async_args`&#39;s API document.
+
+        Args:
+            callback_id: The callback id to identify the function
+            matchers: A list of listener matcher functions.
+                Only when all the matchers return True, the listener function can be invoked.
+            middleware: A list of lister middleware functions.
+                Only when all the middleware call `next()` method, the listener function can be invoked.
+        &#34;&#34;&#34;
+
+        matchers = list(matchers) if matchers else []
+        middleware = list(middleware) if middleware else []
+
+        def __call__(*args, **kwargs):
+            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
+            primary_matcher = builtin_matchers.function_executed(
+                callback_id=callback_id, base_logger=self._base_logger, asyncio=True
+            )
+            return self._register_listener(functions, primary_matcher, matchers, middleware, True)
+
+        return __call__
+
     # -------------------------
     # slash commands
 
@@ -1793,6 +1850,39 @@ <h2 id="args">Args</h2>
 Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
 </dl></div>
 </dd>
+<dt id="slack_bolt.async_app.AsyncApp.function"><code class="name flex">
+<span>def <span class="ident">function</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., Awaitable[bool]]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Awaitable[<a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
+</code></dt>
+<dd>
+<div class="desc"><p>Registers a new Function listener.
+This method can be used as either a decorator or a method.</p>
+<pre><code># Use this method as a decorator
+@app.function("reverse")
+async def reverse_string(ack: AsyncAck, inputs: dict, complete: AsyncComplete, fail: AsyncFail):
+    try:
+        await ack()
+        string_to_reverse = inputs["stringToReverse"]
+        await complete({"reverseString": string_to_reverse[::-1]})
+    except Exception as e:
+        await fail(f"Cannot reverse string (error: {e})")
+        raise e
+
+# Pass a function to this method
+app.function("reverse")(reverse_string)
+</code></pre>
+<p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.async_args" href="kwargs_injection/async_args.html">slack_bolt.kwargs_injection.async_args</a></code>'s API document.</p>
+<h2 id="args">Args</h2>
+<dl>
+<dt><strong><code>callback_id</code></strong></dt>
+<dd>The callback id to identify the function</dd>
+<dt><strong><code>matchers</code></strong></dt>
+<dd>A list of listener matcher functions.
+Only when all the matchers return True, the listener function can be invoked.</dd>
+<dt><strong><code>middleware</code></strong></dt>
+<dd>A list of lister middleware functions.
+Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
+</dl></div>
+</dd>
 <dt id="slack_bolt.async_app.AsyncApp.global_shortcut"><code class="name flex">
 <span>def <span class="ident">global_shortcut</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., Awaitable[bool]]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="middleware/async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Awaitable[Optional[<a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]]</span>
 </code></dt>
@@ -1969,11 +2059,11 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
-<p>Registers a new Workflow Step listener.</p>
+<p>Registers a new step from app listener.</p>
 <p>Unlike others, this method doesn't behave as a decorator.
-If you want to register a workflow step by a decorator, use <code>AsyncWorkflowStepBuilder</code>'s methods.</p>
+If you want to register a step from app by a decorator, use <code>AsyncWorkflowStepBuilder</code>'s methods.</p>
 <pre><code># Create a new WorkflowStep instance
 from slack_bolt.workflows.async_step import AsyncWorkflowStep
 ws = AsyncWorkflowStep(
@@ -1985,7 +2075,7 @@ <h2 id="args">Args</h2>
 # Pass Step to set up listeners
 app.step(ws)
 </code></pre>
-<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of Steps from Apps.</p>
+<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of steps from apps.</p>
 <p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.async_args" href="kwargs_injection/async_args.html">slack_bolt.kwargs_injection.async_args</a></code>'s API document.
 For further information about AsyncWorkflowStep specific function arguments
 such as <code>configure</code>, <code>update</code>, <code>complete</code>, and <code>fail</code>,
@@ -1993,7 +2083,7 @@ <h2 id="args">Args</h2>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The Callback ID for this workflow step</dd>
+<dd>The Callback ID for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>The function for displaying a modal in the Workflow Builder</dd>
 <dt><strong><code>save</code></strong></dt>
@@ -2212,7 +2302,55 @@ <h2 id="args">Args</h2>
                 proxy=self.client.proxy,
                 ssl=self.client.ssl,
             )
-        return self[&#34;respond&#34;]</code></pre>
+        return self[&#34;respond&#34;]
+
+    @property
+    def complete(self) -&gt; AsyncComplete:
+        &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+        any outputs the function returns will be passed along to the next step of its housing workflow,
+        or complete the workflow if the function is the last step in a workflow. Additionally,
+        any interactivity handlers associated to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(ack, complete):
+                await ack()
+                await complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(context):
+                await context.ack()
+                await context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        Returns:
+            Callable `complete()` function
+        &#34;&#34;&#34;
+        if &#34;complete&#34; not in self:
+            self[&#34;complete&#34;] = AsyncComplete(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;complete&#34;]
+
+    @property
+    def fail(self) -&gt; AsyncFail:
+        &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+        its housing workflow will be interrupted and any provided error message will be passed
+        on to the end user through SlackBot. Additionally, any interactivity handlers associated
+        to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(ack, fail):
+                await ack()
+                await fail(error=&#34;something went wrong&#34;)
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(context):
+                await context.ack()
+                await context.fail(error=&#34;something went wrong&#34;)
+
+        Returns:
+            Callable `fail()` function
+        &#34;&#34;&#34;
+        if &#34;fail&#34; not in self:
+            self[&#34;fail&#34;] = AsyncFail(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;fail&#34;]</code></pre>
 </details>
 <h3>Ancestors</h3>
 <ul class="hlist">
@@ -2311,6 +2449,100 @@ <h2 id="returns">Returns</h2>
     return self[&#34;client&#34;]</code></pre>
 </details>
 </dd>
+<dt id="slack_bolt.async_app.AsyncBoltContext.complete"><code class="name">prop <span class="ident">complete</span> : <a title="slack_bolt.context.complete.async_complete.AsyncComplete" href="context/complete/async_complete.html#slack_bolt.context.complete.async_complete.AsyncComplete">AsyncComplete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> function for this request. Once a custom function's state is set to complete,
+any outputs the function returns will be passed along to the next step of its housing workflow,
+or complete the workflow if the function is the last step in a workflow. Additionally,
+any interactivity handlers associated to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+async def handle_button_clicks(ack, complete):
+    await ack()
+    await complete(outputs={"stringReverse":"olleh"})
+
+@app.function("reverse")
+async def handle_button_clicks(context):
+    await context.ack()
+    await context.complete(outputs={"stringReverse":"olleh"})
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>complete()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def complete(self) -&gt; AsyncComplete:
+    &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+    any outputs the function returns will be passed along to the next step of its housing workflow,
+    or complete the workflow if the function is the last step in a workflow. Additionally,
+    any interactivity handlers associated to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(ack, complete):
+            await ack()
+            await complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(context):
+            await context.ack()
+            await context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+    Returns:
+        Callable `complete()` function
+    &#34;&#34;&#34;
+    if &#34;complete&#34; not in self:
+        self[&#34;complete&#34;] = AsyncComplete(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;complete&#34;]</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.async_app.AsyncBoltContext.fail"><code class="name">prop <span class="ident">fail</span> : <a title="slack_bolt.context.fail.async_fail.AsyncFail" href="context/fail/async_fail.html#slack_bolt.context.fail.async_fail.AsyncFail">AsyncFail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> function for this request. Once a custom function's state is set to error,
+its housing workflow will be interrupted and any provided error message will be passed
+on to the end user through SlackBot. Additionally, any interactivity handlers associated
+to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+async def handle_button_clicks(ack, fail):
+    await ack()
+    await fail(error="something went wrong")
+
+@app.function("reverse")
+async def handle_button_clicks(context):
+    await context.ack()
+    await context.fail(error="something went wrong")
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>fail()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def fail(self) -&gt; AsyncFail:
+    &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+    its housing workflow will be interrupted and any provided error message will be passed
+    on to the end user through SlackBot. Additionally, any interactivity handlers associated
+    to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(ack, fail):
+            await ack()
+            await fail(error=&#34;something went wrong&#34;)
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(context):
+            await context.ack()
+            await context.fail(error=&#34;something went wrong&#34;)
+
+    Returns:
+        Callable `fail()` function
+    &#34;&#34;&#34;
+    if &#34;fail&#34; not in self:
+        self[&#34;fail&#34;] = AsyncFail(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;fail&#34;]</code></pre>
+</details>
+</dd>
 <dt id="slack_bolt.async_app.AsyncBoltContext.respond"><code class="name">prop <span class="ident">respond</span> : Optional[<a title="slack_bolt.context.respond.async_respond.AsyncRespond" href="context/respond/async_respond.html#slack_bolt.context.respond.async_respond.AsyncRespond">AsyncRespond</a>]</code></dt>
 <dd>
 <div class="desc"><p><code>respond()</code> function for this request.</p>
@@ -2424,6 +2656,9 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.bot_user_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.bot_user_id">bot_user_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.channel_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.channel_id">channel_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.enterprise_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.enterprise_id">enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_bot_access_token" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.function_bot_access_token">function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_execution_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.function_execution_id">function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.inputs" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.inputs">inputs</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.is_enterprise_install" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.is_enterprise_install">is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.logger" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.matches" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.matches">matches</a></code></li>
@@ -2993,6 +3228,7 @@ <h4><code><a title="slack_bolt.async_app.AsyncApp" href="#slack_bolt.async_app.A
 <li><code><a title="slack_bolt.async_app.AsyncApp.enable_token_revocation_listeners" href="#slack_bolt.async_app.AsyncApp.enable_token_revocation_listeners">enable_token_revocation_listeners</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncApp.error" href="#slack_bolt.async_app.AsyncApp.error">error</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncApp.event" href="#slack_bolt.async_app.AsyncApp.event">event</a></code></li>
+<li><code><a title="slack_bolt.async_app.AsyncApp.function" href="#slack_bolt.async_app.AsyncApp.function">function</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncApp.global_shortcut" href="#slack_bolt.async_app.AsyncApp.global_shortcut">global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncApp.installation_store" href="#slack_bolt.async_app.AsyncApp.installation_store">installation_store</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncApp.listener_runner" href="#slack_bolt.async_app.AsyncApp.listener_runner">listener_runner</a></code></li>
@@ -3017,9 +3253,11 @@ <h4><code><a title="slack_bolt.async_app.AsyncApp" href="#slack_bolt.async_app.A
 </li>
 <li>
 <h4><code><a title="slack_bolt.async_app.AsyncBoltContext" href="#slack_bolt.async_app.AsyncBoltContext">AsyncBoltContext</a></code></h4>
-<ul class="">
+<ul class="two-column">
 <li><code><a title="slack_bolt.async_app.AsyncBoltContext.ack" href="#slack_bolt.async_app.AsyncBoltContext.ack">ack</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncBoltContext.client" href="#slack_bolt.async_app.AsyncBoltContext.client">client</a></code></li>
+<li><code><a title="slack_bolt.async_app.AsyncBoltContext.complete" href="#slack_bolt.async_app.AsyncBoltContext.complete">complete</a></code></li>
+<li><code><a title="slack_bolt.async_app.AsyncBoltContext.fail" href="#slack_bolt.async_app.AsyncBoltContext.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncBoltContext.respond" href="#slack_bolt.async_app.AsyncBoltContext.respond">respond</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncBoltContext.say" href="#slack_bolt.async_app.AsyncBoltContext.say">say</a></code></li>
 <li><code><a title="slack_bolt.async_app.AsyncBoltContext.to_copyable" href="#slack_bolt.async_app.AsyncBoltContext.to_copyable">to_copyable</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/context/async_context.html b/docs/static/api-docs/slack_bolt/context/async_context.html
index 550ae524e..f7f5d35bd 100644
--- a/docs/static/api-docs/slack_bolt/context/async_context.html
+++ b/docs/static/api-docs/slack_bolt/context/async_context.html
@@ -157,7 +157,55 @@ <h2 class="section-title" id="header-classes">Classes</h2>
                 proxy=self.client.proxy,
                 ssl=self.client.ssl,
             )
-        return self[&#34;respond&#34;]</code></pre>
+        return self[&#34;respond&#34;]
+
+    @property
+    def complete(self) -&gt; AsyncComplete:
+        &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+        any outputs the function returns will be passed along to the next step of its housing workflow,
+        or complete the workflow if the function is the last step in a workflow. Additionally,
+        any interactivity handlers associated to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(ack, complete):
+                await ack()
+                await complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(context):
+                await context.ack()
+                await context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        Returns:
+            Callable `complete()` function
+        &#34;&#34;&#34;
+        if &#34;complete&#34; not in self:
+            self[&#34;complete&#34;] = AsyncComplete(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;complete&#34;]
+
+    @property
+    def fail(self) -&gt; AsyncFail:
+        &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+        its housing workflow will be interrupted and any provided error message will be passed
+        on to the end user through SlackBot. Additionally, any interactivity handlers associated
+        to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(ack, fail):
+                await ack()
+                await fail(error=&#34;something went wrong&#34;)
+
+            @app.function(&#34;reverse&#34;)
+            async def handle_button_clicks(context):
+                await context.ack()
+                await context.fail(error=&#34;something went wrong&#34;)
+
+        Returns:
+            Callable `fail()` function
+        &#34;&#34;&#34;
+        if &#34;fail&#34; not in self:
+            self[&#34;fail&#34;] = AsyncFail(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;fail&#34;]</code></pre>
 </details>
 <h3>Ancestors</h3>
 <ul class="hlist">
@@ -256,6 +304,100 @@ <h2 id="returns">Returns</h2>
     return self[&#34;client&#34;]</code></pre>
 </details>
 </dd>
+<dt id="slack_bolt.context.async_context.AsyncBoltContext.complete"><code class="name">prop <span class="ident">complete</span> : <a title="slack_bolt.context.complete.async_complete.AsyncComplete" href="complete/async_complete.html#slack_bolt.context.complete.async_complete.AsyncComplete">AsyncComplete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> function for this request. Once a custom function's state is set to complete,
+any outputs the function returns will be passed along to the next step of its housing workflow,
+or complete the workflow if the function is the last step in a workflow. Additionally,
+any interactivity handlers associated to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+async def handle_button_clicks(ack, complete):
+    await ack()
+    await complete(outputs={"stringReverse":"olleh"})
+
+@app.function("reverse")
+async def handle_button_clicks(context):
+    await context.ack()
+    await context.complete(outputs={"stringReverse":"olleh"})
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>complete()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def complete(self) -&gt; AsyncComplete:
+    &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+    any outputs the function returns will be passed along to the next step of its housing workflow,
+    or complete the workflow if the function is the last step in a workflow. Additionally,
+    any interactivity handlers associated to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(ack, complete):
+            await ack()
+            await complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(context):
+            await context.ack()
+            await context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+    Returns:
+        Callable `complete()` function
+    &#34;&#34;&#34;
+    if &#34;complete&#34; not in self:
+        self[&#34;complete&#34;] = AsyncComplete(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;complete&#34;]</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.context.async_context.AsyncBoltContext.fail"><code class="name">prop <span class="ident">fail</span> : <a title="slack_bolt.context.fail.async_fail.AsyncFail" href="fail/async_fail.html#slack_bolt.context.fail.async_fail.AsyncFail">AsyncFail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> function for this request. Once a custom function's state is set to error,
+its housing workflow will be interrupted and any provided error message will be passed
+on to the end user through SlackBot. Additionally, any interactivity handlers associated
+to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+async def handle_button_clicks(ack, fail):
+    await ack()
+    await fail(error="something went wrong")
+
+@app.function("reverse")
+async def handle_button_clicks(context):
+    await context.ack()
+    await context.fail(error="something went wrong")
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>fail()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def fail(self) -&gt; AsyncFail:
+    &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+    its housing workflow will be interrupted and any provided error message will be passed
+    on to the end user through SlackBot. Additionally, any interactivity handlers associated
+    to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(ack, fail):
+            await ack()
+            await fail(error=&#34;something went wrong&#34;)
+
+        @app.function(&#34;reverse&#34;)
+        async def handle_button_clicks(context):
+            await context.ack()
+            await context.fail(error=&#34;something went wrong&#34;)
+
+    Returns:
+        Callable `fail()` function
+    &#34;&#34;&#34;
+    if &#34;fail&#34; not in self:
+        self[&#34;fail&#34;] = AsyncFail(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;fail&#34;]</code></pre>
+</details>
+</dd>
 <dt id="slack_bolt.context.async_context.AsyncBoltContext.respond"><code class="name">prop <span class="ident">respond</span> : Optional[<a title="slack_bolt.context.respond.async_respond.AsyncRespond" href="respond/async_respond.html#slack_bolt.context.respond.async_respond.AsyncRespond">AsyncRespond</a>]</code></dt>
 <dd>
 <div class="desc"><p><code>respond()</code> function for this request.</p>
@@ -369,6 +511,9 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.bot_user_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.bot_user_id">bot_user_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.channel_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.channel_id">channel_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.enterprise_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.enterprise_id">enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_bot_access_token" href="base_context.html#slack_bolt.context.base_context.BaseContext.function_bot_access_token">function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_execution_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.function_execution_id">function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.inputs" href="base_context.html#slack_bolt.context.base_context.BaseContext.inputs">inputs</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.is_enterprise_install" href="base_context.html#slack_bolt.context.base_context.BaseContext.is_enterprise_install">is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.logger" href="base_context.html#slack_bolt.context.base_context.BaseContext.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.matches" href="base_context.html#slack_bolt.context.base_context.BaseContext.matches">matches</a></code></li>
@@ -398,9 +543,11 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.context.async_context.AsyncBoltContext" href="#slack_bolt.context.async_context.AsyncBoltContext">AsyncBoltContext</a></code></h4>
-<ul class="">
+<ul class="two-column">
 <li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.ack" href="#slack_bolt.context.async_context.AsyncBoltContext.ack">ack</a></code></li>
 <li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.client" href="#slack_bolt.context.async_context.AsyncBoltContext.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.complete" href="#slack_bolt.context.async_context.AsyncBoltContext.complete">complete</a></code></li>
+<li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.fail" href="#slack_bolt.context.async_context.AsyncBoltContext.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.respond" href="#slack_bolt.context.async_context.AsyncBoltContext.respond">respond</a></code></li>
 <li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.say" href="#slack_bolt.context.async_context.AsyncBoltContext.say">say</a></code></li>
 <li><code><a title="slack_bolt.context.async_context.AsyncBoltContext.to_copyable" href="#slack_bolt.context.async_context.AsyncBoltContext.to_copyable">to_copyable</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/context/base_context.html b/docs/static/api-docs/slack_bolt/context/base_context.html
index 866aee621..3c06dcb81 100644
--- a/docs/static/api-docs/slack_bolt/context/base_context.html
+++ b/docs/static/api-docs/slack_bolt/context/base_context.html
@@ -62,14 +62,19 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         &#34;response_url&#34;,
         &#34;matches&#34;,
         &#34;authorize_result&#34;,
+        &#34;function_bot_access_token&#34;,
         &#34;bot_token&#34;,
         &#34;bot_id&#34;,
         &#34;bot_user_id&#34;,
         &#34;user_token&#34;,
+        &#34;function_execution_id&#34;,
+        &#34;inputs&#34;,
         &#34;client&#34;,
         &#34;ack&#34;,
         &#34;say&#34;,
         &#34;respond&#34;,
+        &#34;complete&#34;,
+        &#34;fail&#34;,
     ]
 
     @property
@@ -141,6 +146,20 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         &#34;&#34;&#34;Returns all the matched parts in message listener&#39;s regexp&#34;&#34;&#34;
         return self.get(&#34;matches&#34;)
 
+    @property
+    def function_execution_id(self) -&gt; Optional[str]:
+        &#34;&#34;&#34;The `function_execution_id` associated with this request.
+        Only available for `function_executed` and interactivity events scoped to a custom step.
+        &#34;&#34;&#34;
+        return self.get(&#34;function_execution_id&#34;)
+
+    @property
+    def inputs(self) -&gt; Optional[Dict[str, Any]]:
+        &#34;&#34;&#34;The `inputs` associated with this request.
+        Only available for `function_executed` and interactivity events scoped to a custom step.
+        &#34;&#34;&#34;
+        return self.get(&#34;inputs&#34;)
+
     # --------------------------------
 
     @property
@@ -148,6 +167,13 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         &#34;&#34;&#34;The authorize result resolved for this request.&#34;&#34;&#34;
         return self.get(&#34;authorize_result&#34;)
 
+    @property
+    def function_bot_access_token(self) -&gt; Optional[str]:
+        &#34;&#34;&#34;The bot token resolved for this function request.
+        Only available for `function_executed` and interactivity events scoped to a custom step.
+        &#34;&#34;&#34;
+        return self.get(&#34;function_bot_access_token&#34;)
+
     @property
     def bot_token(self) -&gt; Optional[str]:
         &#34;&#34;&#34;The bot token resolved for this request.&#34;&#34;&#34;
@@ -331,6 +357,54 @@ <h3>Instance variables</h3>
     return self.get(&#34;enterprise_id&#34;)</code></pre>
 </details>
 </dd>
+<dt id="slack_bolt.context.base_context.BaseContext.function_bot_access_token"><code class="name">prop <span class="ident">function_bot_access_token</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"><p>The bot token resolved for this function request.
+Only available for <code>function_executed</code> and interactivity events scoped to a custom step.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def function_bot_access_token(self) -&gt; Optional[str]:
+    &#34;&#34;&#34;The bot token resolved for this function request.
+    Only available for `function_executed` and interactivity events scoped to a custom step.
+    &#34;&#34;&#34;
+    return self.get(&#34;function_bot_access_token&#34;)</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.context.base_context.BaseContext.function_execution_id"><code class="name">prop <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"><p>The <code>function_execution_id</code> associated with this request.
+Only available for <code>function_executed</code> and interactivity events scoped to a custom step.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def function_execution_id(self) -&gt; Optional[str]:
+    &#34;&#34;&#34;The `function_execution_id` associated with this request.
+    Only available for `function_executed` and interactivity events scoped to a custom step.
+    &#34;&#34;&#34;
+    return self.get(&#34;function_execution_id&#34;)</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.context.base_context.BaseContext.inputs"><code class="name">prop <span class="ident">inputs</span> : Optional[Dict[str, Any]]</code></dt>
+<dd>
+<div class="desc"><p>The <code>inputs</code> associated with this request.
+Only available for <code>function_executed</code> and interactivity events scoped to a custom step.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def inputs(self) -&gt; Optional[Dict[str, Any]]:
+    &#34;&#34;&#34;The `inputs` associated with this request.
+    Only available for `function_executed` and interactivity events scoped to a custom step.
+    &#34;&#34;&#34;
+    return self.get(&#34;inputs&#34;)</code></pre>
+</details>
+</dd>
 <dt id="slack_bolt.context.base_context.BaseContext.is_enterprise_install"><code class="name">prop <span class="ident">is_enterprise_install</span> : Optional[bool]</code></dt>
 <dd>
 <div class="desc"><p>True if the request is associated with an Org-wide installation.</p></div>
@@ -473,6 +547,9 @@ <h4><code><a title="slack_bolt.context.base_context.BaseContext" href="#slack_bo
 <li><code><a title="slack_bolt.context.base_context.BaseContext.bot_user_id" href="#slack_bolt.context.base_context.BaseContext.bot_user_id">bot_user_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.channel_id" href="#slack_bolt.context.base_context.BaseContext.channel_id">channel_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.enterprise_id" href="#slack_bolt.context.base_context.BaseContext.enterprise_id">enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_bot_access_token" href="#slack_bolt.context.base_context.BaseContext.function_bot_access_token">function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_execution_id" href="#slack_bolt.context.base_context.BaseContext.function_execution_id">function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.inputs" href="#slack_bolt.context.base_context.BaseContext.inputs">inputs</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.is_enterprise_install" href="#slack_bolt.context.base_context.BaseContext.is_enterprise_install">is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.logger" href="#slack_bolt.context.base_context.BaseContext.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.matches" href="#slack_bolt.context.base_context.BaseContext.matches">matches</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/context/complete/async_complete.html b/docs/static/api-docs/slack_bolt/context/complete/async_complete.html
new file mode 100644
index 000000000..64af656bb
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/context/complete/async_complete.html
@@ -0,0 +1,122 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.context.complete.async_complete API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.context.complete.async_complete</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.context.complete.async_complete.AsyncComplete"><code class="flex name class">
+<span>class <span class="ident">AsyncComplete</span></span>
+<span>(</span><span>client: slack_sdk.web.async_client.AsyncWebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AsyncComplete:
+    client: AsyncWebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: AsyncWebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    async def __call__(self, outputs: Optional[Dict[str, Any]] = None) -&gt; AsyncSlackResponse:
+        &#34;&#34;&#34;Signal the successful completion of the custom function.
+
+        Kwargs:
+            outputs: Json serializable object containing the output values
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;complete is unsupported here as there is no function_execution_id&#34;)
+
+        return await self.client.functions_completeSuccess(
+            function_execution_id=self.function_execution_id, outputs=outputs or {}
+        )</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.context.complete.async_complete.AsyncComplete.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.async_client.AsyncWebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.context.complete.async_complete.AsyncComplete.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.context.complete" href="index.html">slack_bolt.context.complete</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.context.complete.async_complete.AsyncComplete" href="#slack_bolt.context.complete.async_complete.AsyncComplete">AsyncComplete</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.context.complete.async_complete.AsyncComplete.client" href="#slack_bolt.context.complete.async_complete.AsyncComplete.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.complete.async_complete.AsyncComplete.function_execution_id" href="#slack_bolt.context.complete.async_complete.AsyncComplete.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/context/complete/complete.html b/docs/static/api-docs/slack_bolt/context/complete/complete.html
new file mode 100644
index 000000000..50e0fe920
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/context/complete/complete.html
@@ -0,0 +1,120 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.context.complete.complete API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.context.complete.complete</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.context.complete.complete.Complete"><code class="flex name class">
+<span>class <span class="ident">Complete</span></span>
+<span>(</span><span>client: slack_sdk.web.client.WebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class Complete:
+    client: WebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: WebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    def __call__(self, outputs: Optional[Dict[str, Any]] = None) -&gt; SlackResponse:
+        &#34;&#34;&#34;Signal the successful completion of the custom function.
+
+        Kwargs:
+            outputs: Json serializable object containing the output values
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;complete is unsupported here as there is no function_execution_id&#34;)
+
+        return self.client.functions_completeSuccess(function_execution_id=self.function_execution_id, outputs=outputs or {})</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.context.complete.complete.Complete.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.context.complete.complete.Complete.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.context.complete" href="index.html">slack_bolt.context.complete</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.context.complete.complete.Complete" href="#slack_bolt.context.complete.complete.Complete">Complete</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.context.complete.complete.Complete.client" href="#slack_bolt.context.complete.complete.Complete.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.complete.complete.Complete.function_execution_id" href="#slack_bolt.context.complete.complete.Complete.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/context/complete/index.html b/docs/static/api-docs/slack_bolt/context/complete/index.html
new file mode 100644
index 000000000..a35d1b37e
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/context/complete/index.html
@@ -0,0 +1,137 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.context.complete API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.context.complete</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+<h2 class="section-title" id="header-submodules">Sub-modules</h2>
+<dl>
+<dt><code class="name"><a title="slack_bolt.context.complete.async_complete" href="async_complete.html">slack_bolt.context.complete.async_complete</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt><code class="name"><a title="slack_bolt.context.complete.complete" href="complete.html">slack_bolt.context.complete.complete</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.context.complete.Complete"><code class="flex name class">
+<span>class <span class="ident">Complete</span></span>
+<span>(</span><span>client: slack_sdk.web.client.WebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class Complete:
+    client: WebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: WebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    def __call__(self, outputs: Optional[Dict[str, Any]] = None) -&gt; SlackResponse:
+        &#34;&#34;&#34;Signal the successful completion of the custom function.
+
+        Kwargs:
+            outputs: Json serializable object containing the output values
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;complete is unsupported here as there is no function_execution_id&#34;)
+
+        return self.client.functions_completeSuccess(function_execution_id=self.function_execution_id, outputs=outputs or {})</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.context.complete.Complete.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.context.complete.Complete.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.context" href="../index.html">slack_bolt.context</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-submodules">Sub-modules</a></h3>
+<ul>
+<li><code><a title="slack_bolt.context.complete.async_complete" href="async_complete.html">slack_bolt.context.complete.async_complete</a></code></li>
+<li><code><a title="slack_bolt.context.complete.complete" href="complete.html">slack_bolt.context.complete.complete</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.context.complete.Complete" href="#slack_bolt.context.complete.Complete">Complete</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.context.complete.Complete.client" href="#slack_bolt.context.complete.Complete.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.complete.Complete.function_execution_id" href="#slack_bolt.context.complete.Complete.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/context/context.html b/docs/static/api-docs/slack_bolt/context/context.html
index 3e7e57e6b..a7ece7760 100644
--- a/docs/static/api-docs/slack_bolt/context/context.html
+++ b/docs/static/api-docs/slack_bolt/context/context.html
@@ -158,7 +158,55 @@ <h2 class="section-title" id="header-classes">Classes</h2>
                 proxy=self.client.proxy,
                 ssl=self.client.ssl,
             )
-        return self[&#34;respond&#34;]</code></pre>
+        return self[&#34;respond&#34;]
+
+    @property
+    def complete(self) -&gt; Complete:
+        &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+        any outputs the function returns will be passed along to the next step of its housing workflow,
+        or complete the workflow if the function is the last step in a workflow. Additionally,
+        any interactivity handlers associated to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(ack, complete):
+                ack()
+                complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(context):
+                context.ack()
+                context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        Returns:
+            Callable `complete()` function
+        &#34;&#34;&#34;
+        if &#34;complete&#34; not in self:
+            self[&#34;complete&#34;] = Complete(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;complete&#34;]
+
+    @property
+    def fail(self) -&gt; Fail:
+        &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+        its housing workflow will be interrupted and any provided error message will be passed
+        on to the end user through SlackBot. Additionally, any interactivity handlers associated
+        to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(ack, fail):
+                ack()
+                fail(error=&#34;something went wrong&#34;)
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(context):
+                context.ack()
+                context.fail(error=&#34;something went wrong&#34;)
+
+        Returns:
+            Callable `fail()` function
+        &#34;&#34;&#34;
+        if &#34;fail&#34; not in self:
+            self[&#34;fail&#34;] = Fail(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;fail&#34;]</code></pre>
 </details>
 <h3>Ancestors</h3>
 <ul class="hlist">
@@ -257,6 +305,100 @@ <h2 id="returns">Returns</h2>
     return self[&#34;client&#34;]</code></pre>
 </details>
 </dd>
+<dt id="slack_bolt.context.context.BoltContext.complete"><code class="name">prop <span class="ident">complete</span> : <a title="slack_bolt.context.complete.complete.Complete" href="complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> function for this request. Once a custom function's state is set to complete,
+any outputs the function returns will be passed along to the next step of its housing workflow,
+or complete the workflow if the function is the last step in a workflow. Additionally,
+any interactivity handlers associated to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+def handle_button_clicks(ack, complete):
+    ack()
+    complete(outputs={"stringReverse":"olleh"})
+
+@app.function("reverse")
+def handle_button_clicks(context):
+    context.ack()
+    context.complete(outputs={"stringReverse":"olleh"})
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>complete()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def complete(self) -&gt; Complete:
+    &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+    any outputs the function returns will be passed along to the next step of its housing workflow,
+    or complete the workflow if the function is the last step in a workflow. Additionally,
+    any interactivity handlers associated to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(ack, complete):
+            ack()
+            complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(context):
+            context.ack()
+            context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+    Returns:
+        Callable `complete()` function
+    &#34;&#34;&#34;
+    if &#34;complete&#34; not in self:
+        self[&#34;complete&#34;] = Complete(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;complete&#34;]</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.context.context.BoltContext.fail"><code class="name">prop <span class="ident">fail</span> : <a title="slack_bolt.context.fail.fail.Fail" href="fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> function for this request. Once a custom function's state is set to error,
+its housing workflow will be interrupted and any provided error message will be passed
+on to the end user through SlackBot. Additionally, any interactivity handlers associated
+to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+def handle_button_clicks(ack, fail):
+    ack()
+    fail(error="something went wrong")
+
+@app.function("reverse")
+def handle_button_clicks(context):
+    context.ack()
+    context.fail(error="something went wrong")
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>fail()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def fail(self) -&gt; Fail:
+    &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+    its housing workflow will be interrupted and any provided error message will be passed
+    on to the end user through SlackBot. Additionally, any interactivity handlers associated
+    to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(ack, fail):
+            ack()
+            fail(error=&#34;something went wrong&#34;)
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(context):
+            context.ack()
+            context.fail(error=&#34;something went wrong&#34;)
+
+    Returns:
+        Callable `fail()` function
+    &#34;&#34;&#34;
+    if &#34;fail&#34; not in self:
+        self[&#34;fail&#34;] = Fail(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;fail&#34;]</code></pre>
+</details>
+</dd>
 <dt id="slack_bolt.context.context.BoltContext.respond"><code class="name">prop <span class="ident">respond</span> : Optional[<a title="slack_bolt.context.respond.respond.Respond" href="respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>]</code></dt>
 <dd>
 <div class="desc"><p><code>respond()</code> function for this request.</p>
@@ -370,6 +512,9 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.bot_user_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.bot_user_id">bot_user_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.channel_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.channel_id">channel_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.enterprise_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.enterprise_id">enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_bot_access_token" href="base_context.html#slack_bolt.context.base_context.BaseContext.function_bot_access_token">function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_execution_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.function_execution_id">function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.inputs" href="base_context.html#slack_bolt.context.base_context.BaseContext.inputs">inputs</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.is_enterprise_install" href="base_context.html#slack_bolt.context.base_context.BaseContext.is_enterprise_install">is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.logger" href="base_context.html#slack_bolt.context.base_context.BaseContext.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.matches" href="base_context.html#slack_bolt.context.base_context.BaseContext.matches">matches</a></code></li>
@@ -399,9 +544,11 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.context.context.BoltContext" href="#slack_bolt.context.context.BoltContext">BoltContext</a></code></h4>
-<ul class="">
+<ul class="two-column">
 <li><code><a title="slack_bolt.context.context.BoltContext.ack" href="#slack_bolt.context.context.BoltContext.ack">ack</a></code></li>
 <li><code><a title="slack_bolt.context.context.BoltContext.client" href="#slack_bolt.context.context.BoltContext.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.context.BoltContext.complete" href="#slack_bolt.context.context.BoltContext.complete">complete</a></code></li>
+<li><code><a title="slack_bolt.context.context.BoltContext.fail" href="#slack_bolt.context.context.BoltContext.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.context.context.BoltContext.respond" href="#slack_bolt.context.context.BoltContext.respond">respond</a></code></li>
 <li><code><a title="slack_bolt.context.context.BoltContext.say" href="#slack_bolt.context.context.BoltContext.say">say</a></code></li>
 <li><code><a title="slack_bolt.context.context.BoltContext.to_copyable" href="#slack_bolt.context.context.BoltContext.to_copyable">to_copyable</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/context/fail/async_fail.html b/docs/static/api-docs/slack_bolt/context/fail/async_fail.html
new file mode 100644
index 000000000..e27c15281
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/context/fail/async_fail.html
@@ -0,0 +1,120 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.context.fail.async_fail API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.context.fail.async_fail</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.context.fail.async_fail.AsyncFail"><code class="flex name class">
+<span>class <span class="ident">AsyncFail</span></span>
+<span>(</span><span>client: slack_sdk.web.async_client.AsyncWebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AsyncFail:
+    client: AsyncWebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: AsyncWebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    async def __call__(self, error: str) -&gt; AsyncSlackResponse:
+        &#34;&#34;&#34;Signal that the custom function failed to complete.
+
+        Kwargs:
+            error: Error message to return to slack
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;fail is unsupported here as there is no function_execution_id&#34;)
+
+        return await self.client.functions_completeError(function_execution_id=self.function_execution_id, error=error)</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.context.fail.async_fail.AsyncFail.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.async_client.AsyncWebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.context.fail.async_fail.AsyncFail.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.context.fail" href="index.html">slack_bolt.context.fail</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.context.fail.async_fail.AsyncFail" href="#slack_bolt.context.fail.async_fail.AsyncFail">AsyncFail</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.context.fail.async_fail.AsyncFail.client" href="#slack_bolt.context.fail.async_fail.AsyncFail.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.fail.async_fail.AsyncFail.function_execution_id" href="#slack_bolt.context.fail.async_fail.AsyncFail.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/context/fail/fail.html b/docs/static/api-docs/slack_bolt/context/fail/fail.html
new file mode 100644
index 000000000..f33b4d498
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/context/fail/fail.html
@@ -0,0 +1,120 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.context.fail.fail API documentation</title>
+<meta name="description" content="">
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+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.context.fail.fail</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.context.fail.fail.Fail"><code class="flex name class">
+<span>class <span class="ident">Fail</span></span>
+<span>(</span><span>client: slack_sdk.web.client.WebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class Fail:
+    client: WebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: WebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    def __call__(self, error: str) -&gt; SlackResponse:
+        &#34;&#34;&#34;Signal that the custom function failed to complete.
+
+        Kwargs:
+            error: Error message to return to slack
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;fail is unsupported here as there is no function_execution_id&#34;)
+
+        return self.client.functions_completeError(function_execution_id=self.function_execution_id, error=error)</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.context.fail.fail.Fail.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.context.fail.fail.Fail.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.context.fail" href="index.html">slack_bolt.context.fail</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.context.fail.fail.Fail" href="#slack_bolt.context.fail.fail.Fail">Fail</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.context.fail.fail.Fail.client" href="#slack_bolt.context.fail.fail.Fail.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.fail.fail.Fail.function_execution_id" href="#slack_bolt.context.fail.fail.Fail.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/context/fail/index.html b/docs/static/api-docs/slack_bolt/context/fail/index.html
new file mode 100644
index 000000000..eecb86147
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/context/fail/index.html
@@ -0,0 +1,137 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.context.fail API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.context.fail</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+<h2 class="section-title" id="header-submodules">Sub-modules</h2>
+<dl>
+<dt><code class="name"><a title="slack_bolt.context.fail.async_fail" href="async_fail.html">slack_bolt.context.fail.async_fail</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt><code class="name"><a title="slack_bolt.context.fail.fail" href="fail.html">slack_bolt.context.fail.fail</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.context.fail.Fail"><code class="flex name class">
+<span>class <span class="ident">Fail</span></span>
+<span>(</span><span>client: slack_sdk.web.client.WebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class Fail:
+    client: WebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: WebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    def __call__(self, error: str) -&gt; SlackResponse:
+        &#34;&#34;&#34;Signal that the custom function failed to complete.
+
+        Kwargs:
+            error: Error message to return to slack
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;fail is unsupported here as there is no function_execution_id&#34;)
+
+        return self.client.functions_completeError(function_execution_id=self.function_execution_id, error=error)</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.context.fail.Fail.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.context.fail.Fail.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.context" href="../index.html">slack_bolt.context</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-submodules">Sub-modules</a></h3>
+<ul>
+<li><code><a title="slack_bolt.context.fail.async_fail" href="async_fail.html">slack_bolt.context.fail.async_fail</a></code></li>
+<li><code><a title="slack_bolt.context.fail.fail" href="fail.html">slack_bolt.context.fail.fail</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.context.fail.Fail" href="#slack_bolt.context.fail.Fail">Fail</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.context.fail.Fail.client" href="#slack_bolt.context.fail.Fail.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.fail.Fail.function_execution_id" href="#slack_bolt.context.fail.Fail.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/context/index.html b/docs/static/api-docs/slack_bolt/context/index.html
index bcefa0072..c7cf9af71 100644
--- a/docs/static/api-docs/slack_bolt/context/index.html
+++ b/docs/static/api-docs/slack_bolt/context/index.html
@@ -46,10 +46,18 @@ <h2 class="section-title" id="header-submodules">Sub-modules</h2>
 <dd>
 <div class="desc"></div>
 </dd>
+<dt><code class="name"><a title="slack_bolt.context.complete" href="complete/index.html">slack_bolt.context.complete</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
 <dt><code class="name"><a title="slack_bolt.context.context" href="context.html">slack_bolt.context.context</a></code></dt>
 <dd>
 <div class="desc"></div>
 </dd>
+<dt><code class="name"><a title="slack_bolt.context.fail" href="fail/index.html">slack_bolt.context.fail</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
 <dt><code class="name"><a title="slack_bolt.context.respond" href="respond/index.html">slack_bolt.context.respond</a></code></dt>
 <dd>
 <div class="desc"></div>
@@ -190,7 +198,55 @@ <h2 class="section-title" id="header-classes">Classes</h2>
                 proxy=self.client.proxy,
                 ssl=self.client.ssl,
             )
-        return self[&#34;respond&#34;]</code></pre>
+        return self[&#34;respond&#34;]
+
+    @property
+    def complete(self) -&gt; Complete:
+        &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+        any outputs the function returns will be passed along to the next step of its housing workflow,
+        or complete the workflow if the function is the last step in a workflow. Additionally,
+        any interactivity handlers associated to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(ack, complete):
+                ack()
+                complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(context):
+                context.ack()
+                context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        Returns:
+            Callable `complete()` function
+        &#34;&#34;&#34;
+        if &#34;complete&#34; not in self:
+            self[&#34;complete&#34;] = Complete(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;complete&#34;]
+
+    @property
+    def fail(self) -&gt; Fail:
+        &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+        its housing workflow will be interrupted and any provided error message will be passed
+        on to the end user through SlackBot. Additionally, any interactivity handlers associated
+        to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(ack, fail):
+                ack()
+                fail(error=&#34;something went wrong&#34;)
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(context):
+                context.ack()
+                context.fail(error=&#34;something went wrong&#34;)
+
+        Returns:
+            Callable `fail()` function
+        &#34;&#34;&#34;
+        if &#34;fail&#34; not in self:
+            self[&#34;fail&#34;] = Fail(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;fail&#34;]</code></pre>
 </details>
 <h3>Ancestors</h3>
 <ul class="hlist">
@@ -289,6 +345,100 @@ <h2 id="returns">Returns</h2>
     return self[&#34;client&#34;]</code></pre>
 </details>
 </dd>
+<dt id="slack_bolt.context.BoltContext.complete"><code class="name">prop <span class="ident">complete</span> : <a title="slack_bolt.context.complete.complete.Complete" href="complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a></code></dt>
+<dd>
+<div class="desc"><p><code><a title="slack_bolt.context.complete" href="complete/index.html">slack_bolt.context.complete</a></code> function for this request. Once a custom function's state is set to complete,
+any outputs the function returns will be passed along to the next step of its housing workflow,
+or complete the workflow if the function is the last step in a workflow. Additionally,
+any interactivity handlers associated to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+def handle_button_clicks(ack, complete):
+    ack()
+    complete(outputs={"stringReverse":"olleh"})
+
+@app.function("reverse")
+def handle_button_clicks(context):
+    context.ack()
+    context.complete(outputs={"stringReverse":"olleh"})
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code><a title="slack_bolt.context.complete" href="complete/index.html">slack_bolt.context.complete</a></code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def complete(self) -&gt; Complete:
+    &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+    any outputs the function returns will be passed along to the next step of its housing workflow,
+    or complete the workflow if the function is the last step in a workflow. Additionally,
+    any interactivity handlers associated to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(ack, complete):
+            ack()
+            complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(context):
+            context.ack()
+            context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+    Returns:
+        Callable `complete()` function
+    &#34;&#34;&#34;
+    if &#34;complete&#34; not in self:
+        self[&#34;complete&#34;] = Complete(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;complete&#34;]</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.context.BoltContext.fail"><code class="name">prop <span class="ident">fail</span> : <a title="slack_bolt.context.fail.fail.Fail" href="fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a></code></dt>
+<dd>
+<div class="desc"><p><code><a title="slack_bolt.context.fail" href="fail/index.html">slack_bolt.context.fail</a></code> function for this request. Once a custom function's state is set to error,
+its housing workflow will be interrupted and any provided error message will be passed
+on to the end user through SlackBot. Additionally, any interactivity handlers associated
+to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+def handle_button_clicks(ack, fail):
+    ack()
+    fail(error="something went wrong")
+
+@app.function("reverse")
+def handle_button_clicks(context):
+    context.ack()
+    context.fail(error="something went wrong")
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code><a title="slack_bolt.context.fail" href="fail/index.html">slack_bolt.context.fail</a></code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def fail(self) -&gt; Fail:
+    &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+    its housing workflow will be interrupted and any provided error message will be passed
+    on to the end user through SlackBot. Additionally, any interactivity handlers associated
+    to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(ack, fail):
+            ack()
+            fail(error=&#34;something went wrong&#34;)
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(context):
+            context.ack()
+            context.fail(error=&#34;something went wrong&#34;)
+
+    Returns:
+        Callable `fail()` function
+    &#34;&#34;&#34;
+    if &#34;fail&#34; not in self:
+        self[&#34;fail&#34;] = Fail(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;fail&#34;]</code></pre>
+</details>
+</dd>
 <dt id="slack_bolt.context.BoltContext.respond"><code class="name">prop <span class="ident">respond</span> : Optional[<a title="slack_bolt.context.respond.respond.Respond" href="respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>]</code></dt>
 <dd>
 <div class="desc"><p><code><a title="slack_bolt.context.respond" href="respond/index.html">slack_bolt.context.respond</a></code> function for this request.</p>
@@ -402,6 +552,9 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.bot_user_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.bot_user_id">bot_user_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.channel_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.channel_id">channel_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.enterprise_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.enterprise_id">enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_bot_access_token" href="base_context.html#slack_bolt.context.base_context.BaseContext.function_bot_access_token">function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_execution_id" href="base_context.html#slack_bolt.context.base_context.BaseContext.function_execution_id">function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.inputs" href="base_context.html#slack_bolt.context.base_context.BaseContext.inputs">inputs</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.is_enterprise_install" href="base_context.html#slack_bolt.context.base_context.BaseContext.is_enterprise_install">is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.logger" href="base_context.html#slack_bolt.context.base_context.BaseContext.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.matches" href="base_context.html#slack_bolt.context.base_context.BaseContext.matches">matches</a></code></li>
@@ -432,7 +585,9 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.context.ack" href="ack/index.html">slack_bolt.context.ack</a></code></li>
 <li><code><a title="slack_bolt.context.async_context" href="async_context.html">slack_bolt.context.async_context</a></code></li>
 <li><code><a title="slack_bolt.context.base_context" href="base_context.html">slack_bolt.context.base_context</a></code></li>
+<li><code><a title="slack_bolt.context.complete" href="complete/index.html">slack_bolt.context.complete</a></code></li>
 <li><code><a title="slack_bolt.context.context" href="context.html">slack_bolt.context.context</a></code></li>
+<li><code><a title="slack_bolt.context.fail" href="fail/index.html">slack_bolt.context.fail</a></code></li>
 <li><code><a title="slack_bolt.context.respond" href="respond/index.html">slack_bolt.context.respond</a></code></li>
 <li><code><a title="slack_bolt.context.say" href="say/index.html">slack_bolt.context.say</a></code></li>
 </ul>
@@ -441,9 +596,11 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.context.BoltContext" href="#slack_bolt.context.BoltContext">BoltContext</a></code></h4>
-<ul class="">
+<ul class="two-column">
 <li><code><a title="slack_bolt.context.BoltContext.ack" href="#slack_bolt.context.BoltContext.ack">ack</a></code></li>
 <li><code><a title="slack_bolt.context.BoltContext.client" href="#slack_bolt.context.BoltContext.client">client</a></code></li>
+<li><code><a title="slack_bolt.context.BoltContext.complete" href="#slack_bolt.context.BoltContext.complete">complete</a></code></li>
+<li><code><a title="slack_bolt.context.BoltContext.fail" href="#slack_bolt.context.BoltContext.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.context.BoltContext.respond" href="#slack_bolt.context.BoltContext.respond">respond</a></code></li>
 <li><code><a title="slack_bolt.context.BoltContext.say" href="#slack_bolt.context.BoltContext.say">say</a></code></li>
 <li><code><a title="slack_bolt.context.BoltContext.to_copyable" href="#slack_bolt.context.BoltContext.to_copyable">to_copyable</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/index.html b/docs/static/api-docs/slack_bolt/index.html
index cb584458f..e58083201 100644
--- a/docs/static/api-docs/slack_bolt/index.html
+++ b/docs/static/api-docs/slack_bolt/index.html
@@ -110,7 +110,7 @@ <h2 class="section-title" id="header-submodules">Sub-modules</h2>
 </dd>
 <dt><code class="name"><a title="slack_bolt.workflows" href="workflows/index.html">slack_bolt.workflows</a></code></dt>
 <dd>
-<div class="desc"><p>Workflow Steps from Apps enables developers to build their own custom workflow steps …</p></div>
+<div class="desc"><p>Steps from apps enables developers to build their own steps …</p></div>
 </dd>
 </dl>
 </section>
@@ -177,7 +177,7 @@ <h3>Class variables</h3>
 </dd>
 <dt id="slack_bolt.App"><code class="flex name class">
 <span>class <span class="ident">App</span></span>
-<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.middleware.Middleware" href="middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a>] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None)</span>
+<span>(</span><span>*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[<a title="slack_bolt.middleware.middleware.Middleware" href="middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, attaching_function_token_enabled: bool = True, oauth_settings: Optional[<a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a>] = None, oauth_flow: Optional[<a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a>] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>Bolt App that provides functionalities to register middleware/listeners.</p>
@@ -251,6 +251,10 @@ <h2 id="args">Args</h2>
 <dd>False if you would like to disable the built-in middleware (Default: True).
 <code>UrlVerification</code> is a built-in middleware that handles url_verification requests
 that verify the endpoint for Events API in HTTP Mode requests.</dd>
+<dt><strong><code>attaching_function_token_enabled</code></strong></dt>
+<dd>False if you would like to disable the built-in middleware (Default: True).
+<code>AttachingFunctionToken</code> is a built-in middleware that injects the just-in-time workflow-execution tokens
+when your app receives <code>function_executed</code> or interactivity events scoped to a custom step.</dd>
 <dt><strong><code>ssl_check_enabled</code></strong></dt>
 <dd>bool = False if you would like to disable the built-in middleware (Default: True).
 <code>SslCheck</code> is a built-in middleware that handles ssl_check requests from Slack.</dd>
@@ -297,6 +301,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         # for the OAuth flow
         oauth_settings: Optional[OAuthSettings] = None,
         oauth_flow: Optional[OAuthFlow] = None,
@@ -362,6 +367,9 @@ <h2 id="args">Args</h2>
             url_verification_enabled: False if you would like to disable the built-in middleware (Default: True).
                 `UrlVerification` is a built-in middleware that handles url_verification requests
                 that verify the endpoint for Events API in HTTP Mode requests.
+            attaching_function_token_enabled: False if you would like to disable the built-in middleware (Default: True).
+                `AttachingFunctionToken` is a built-in middleware that injects the just-in-time workflow-execution tokens
+                when your app receives `function_executed` or interactivity events scoped to a custom step.
             ssl_check_enabled: bool = False if you would like to disable the built-in middleware (Default: True).
                 `SslCheck` is a built-in middleware that handles ssl_check requests from Slack.
             oauth_settings: The settings related to Slack app installation flow (OAuth flow)
@@ -536,6 +544,7 @@ <h2 id="args">Args</h2>
             ignoring_self_events_enabled=ignoring_self_events_enabled,
             ssl_check_enabled=ssl_check_enabled,
             url_verification_enabled=url_verification_enabled,
+            attaching_function_token_enabled=attaching_function_token_enabled,
             user_facing_authorize_error_message=user_facing_authorize_error_message,
         )
 
@@ -546,6 +555,7 @@ <h2 id="args">Args</h2>
         ignoring_self_events_enabled: bool = True,
         ssl_check_enabled: bool = True,
         url_verification_enabled: bool = True,
+        attaching_function_token_enabled: bool = True,
         user_facing_authorize_error_message: Optional[str] = None,
     ):
         if self._init_middleware_list_done:
@@ -603,6 +613,8 @@ <h2 id="args">Args</h2>
             self._middleware_list.append(IgnoringSelfEvents(base_logger=self._base_logger))
         if url_verification_enabled is True:
             self._middleware_list.append(UrlVerification(base_logger=self._base_logger))
+        if attaching_function_token_enabled is True:
+            self._middleware_list.append(AttachingFunctionToken())
         self._init_middleware_list_done = True
 
     # -------------------------
@@ -835,7 +847,7 @@ <h2 id="args">Args</h2>
         return None
 
     # -------------------------
-    # Workflows: Steps from Apps
+    # Workflows: Steps from apps
 
     def step(
         self,
@@ -846,13 +858,13 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
-        Registers a new Workflow Step listener.
+        Registers a new step from app listener.
 
         Unlike others, this method doesn&#39;t behave as a decorator.
-        If you want to register a workflow step by a decorator, use `WorkflowStepBuilder`&#39;s methods.
+        If you want to register a step from app by a decorator, use `WorkflowStepBuilder`&#39;s methods.
 
             # Create a new WorkflowStep instance
             from slack_bolt.workflows.step import WorkflowStep
@@ -865,7 +877,7 @@ <h2 id="args">Args</h2>
             # Pass Step to set up listeners
             app.step(ws)
 
-        Refer to https://api.slack.com/workflows/steps for details of Steps from Apps.
+        Refer to https://api.slack.com/workflows/steps for details of steps from apps.
 
         To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`&#39;s API document.
 
@@ -874,14 +886,14 @@ <h2 id="args">Args</h2>
         refer to `slack_bolt.workflows.step.utilities` API documents.
 
         Args:
-            callback_id: The Callback ID for this workflow step
+            callback_id: The Callback ID for this step from app
             edit: The function for displaying a modal in the Workflow Builder
             save: The function for handling configuration in the Workflow Builder
             execute: The function for handling the step execution
         &#34;&#34;&#34;
         warnings.warn(
             (
-                &#34;Steps from Apps for legacy workflows are now deprecated. &#34;
+                &#34;Steps from apps for legacy workflows are now deprecated. &#34;
                 &#34;Use new custom steps: https://api.slack.com/automation/functions/custom-bolt&#34;
             ),
             category=DeprecationWarning,
@@ -1037,6 +1049,49 @@ <h2 id="args">Args</h2>
 
         return __call__
 
+    def function(
+        self,
+        callback_id: Union[str, Pattern],
+        matchers: Optional[Sequence[Callable[..., bool]]] = None,
+        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
+    ) -&gt; Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
+        &#34;&#34;&#34;Registers a new Function listener.
+        This method can be used as either a decorator or a method.
+
+            # Use this method as a decorator
+            @app.function(&#34;reverse&#34;)
+            def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
+                try:
+                    ack()
+                    string_to_reverse = inputs[&#34;stringToReverse&#34;]
+                    complete(outputs={&#34;reverseString&#34;: string_to_reverse[::-1]})
+                except Exception as e:
+                    fail(f&#34;Cannot reverse string (error: {e})&#34;)
+                    raise e
+
+            # Pass a function to this method
+            app.function(&#34;reverse&#34;)(reverse_string)
+
+        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`&#39;s API document.
+
+        Args:
+            callback_id: The callback id to identify the function
+            matchers: A list of listener matcher functions.
+                Only when all the matchers return True, the listener function can be invoked.
+            middleware: A list of lister middleware functions.
+                Only when all the middleware call `next()` method, the listener function can be invoked.
+        &#34;&#34;&#34;
+
+        matchers = list(matchers) if matchers else []
+        middleware = list(middleware) if middleware else []
+
+        def __call__(*args, **kwargs):
+            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
+            primary_matcher = builtin_matchers.function_executed(callback_id=callback_id, base_logger=self._base_logger)
+            return self._register_listener(functions, primary_matcher, matchers, middleware, True)
+
+        return __call__
+
     # -------------------------
     # slash commands
 
@@ -1806,6 +1861,39 @@ <h2 id="args">Args</h2>
 Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
 </dl></div>
 </dd>
+<dt id="slack_bolt.App.function"><code class="name flex">
+<span>def <span class="ident">function</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.middleware.Middleware" href="middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[<a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
+</code></dt>
+<dd>
+<div class="desc"><p>Registers a new Function listener.
+This method can be used as either a decorator or a method.</p>
+<pre><code># Use this method as a decorator
+@app.function("reverse")
+def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
+    try:
+        ack()
+        string_to_reverse = inputs["stringToReverse"]
+        complete(outputs={"reverseString": string_to_reverse[::-1]})
+    except Exception as e:
+        fail(f"Cannot reverse string (error: {e})")
+        raise e
+
+# Pass a function to this method
+app.function("reverse")(reverse_string)
+</code></pre>
+<p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.args" href="kwargs_injection/args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.</p>
+<h2 id="args">Args</h2>
+<dl>
+<dt><strong><code>callback_id</code></strong></dt>
+<dd>The callback id to identify the function</dd>
+<dt><strong><code>matchers</code></strong></dt>
+<dd>A list of listener matcher functions.
+Only when all the matchers return True, the listener function can be invoked.</dd>
+<dt><strong><code>middleware</code></strong></dt>
+<dd>A list of lister middleware functions.
+Only when all the middleware call <code>next()</code> method, the listener function can be invoked.</dd>
+</dl></div>
+</dd>
 <dt id="slack_bolt.App.global_shortcut"><code class="name flex">
 <span>def <span class="ident">global_shortcut</span></span>(<span>self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, <a title="slack_bolt.middleware.middleware.Middleware" href="middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a>]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[<a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>]]]]</span>
 </code></dt>
@@ -1972,11 +2060,11 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
-<p>Registers a new Workflow Step listener.</p>
+<p>Registers a new step from app listener.</p>
 <p>Unlike others, this method doesn't behave as a decorator.
-If you want to register a workflow step by a decorator, use <code>WorkflowStepBuilder</code>'s methods.</p>
+If you want to register a step from app by a decorator, use <code>WorkflowStepBuilder</code>'s methods.</p>
 <pre><code># Create a new WorkflowStep instance
 from slack_bolt.workflows.step import WorkflowStep
 ws = WorkflowStep(
@@ -1988,7 +2076,7 @@ <h2 id="args">Args</h2>
 # Pass Step to set up listeners
 app.step(ws)
 </code></pre>
-<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of Steps from Apps.</p>
+<p>Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details of steps from apps.</p>
 <p>To learn available arguments for middleware/listeners, see <code><a title="slack_bolt.kwargs_injection.args" href="kwargs_injection/args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.</p>
 <p>For further information about WorkflowStep specific function arguments
 such as <code>configure</code>, <code>update</code>, <code>complete</code>, and <code>fail</code>,
@@ -1996,7 +2084,7 @@ <h2 id="args">Args</h2>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The Callback ID for this workflow step</dd>
+<dd>The Callback ID for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>The function for displaying a modal in the Workflow Builder</dd>
 <dt><strong><code>save</code></strong></dt>
@@ -2070,7 +2158,7 @@ <h2 id="args">Args</h2>
 </dd>
 <dt id="slack_bolt.Args"><code class="flex name class">
 <span>class <span class="ident">Args</span></span>
-<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.client.WebClient, req: <a title="slack_bolt.request.request.BoltRequest" href="request/request.html#slack_bolt.request.request.BoltRequest">BoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.context.BoltContext" href="context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.ack.Ack" href="context/ack/ack.html#slack_bolt.context.ack.ack.Ack">Ack</a>, say: <a title="slack_bolt.context.say.say.Say" href="context/say/say.html#slack_bolt.context.say.say.Say">Say</a>, respond: <a title="slack_bolt.context.respond.respond.Respond" href="context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>, next: Callable[[], None], **kwargs)</span>
+<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.client.WebClient, req: <a title="slack_bolt.request.request.BoltRequest" href="request/request.html#slack_bolt.request.request.BoltRequest">BoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.context.BoltContext" href="context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.ack.Ack" href="context/ack/ack.html#slack_bolt.context.ack.ack.Ack">Ack</a>, say: <a title="slack_bolt.context.say.say.Say" href="context/say/say.html#slack_bolt.context.say.say.Say">Say</a>, respond: <a title="slack_bolt.context.respond.respond.Respond" href="context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>, complete: <a title="slack_bolt.context.complete.complete.Complete" href="context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a>, fail: <a title="slack_bolt.context.fail.fail.Fail" href="context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a>, next: Callable[[], None], **kwargs)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>All the arguments in this class are available in any middleware / listeners.
@@ -2172,6 +2260,10 @@ <h2 id="args">Args</h2>
     &#34;&#34;&#34;`say()` utility function, which calls `chat.postMessage` API with the associated channel ID&#34;&#34;&#34;
     respond: Respond
     &#34;&#34;&#34;`respond()` utility function, which utilizes the associated `response_url`&#34;&#34;&#34;
+    complete: Complete
+    &#34;&#34;&#34;`complete()` utility function, signals a successful completion of the custom function&#34;&#34;&#34;
+    fail: Fail
+    &#34;&#34;&#34;`fail()` utility function, signal that the custom function failed to complete&#34;&#34;&#34;
     # middleware
     next: Callable[[], None]
     &#34;&#34;&#34;`next()` utility function, which tells the middleware chain that it can continue with the next one&#34;&#34;&#34;
@@ -2198,6 +2290,8 @@ <h2 id="args">Args</h2>
         ack: Ack,
         say: Say,
         respond: Respond,
+        complete: Complete,
+        fail: Fail,
         # As this method is not supposed to be invoked by bolt-python users,
         # the naming conflict with the built-in one affects
         # only the internals of this method
@@ -2223,6 +2317,8 @@ <h2 id="args">Args</h2>
         self.ack: Ack = ack
         self.say: Say = say
         self.respond: Respond = respond
+        self.complete: Complete = complete
+        self.fail: Fail = fail
         self.next: Callable[[], None] = next
         self.next_: Callable[[], None] = next</code></pre>
 </details>
@@ -2248,6 +2344,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.command</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.Args.complete"><code class="name">var <span class="ident">complete</span> : <a title="slack_bolt.context.complete.complete.Complete" href="context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> utility function, signals a successful completion of the custom function</p></div>
+</dd>
 <dt id="slack_bolt.Args.context"><code class="name">var <span class="ident">context</span> : <a title="slack_bolt.context.context.BoltContext" href="context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a></code></dt>
 <dd>
 <div class="desc"><p>Context data associated with the incoming request</p></div>
@@ -2256,6 +2356,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.event</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.Args.fail"><code class="name">var <span class="ident">fail</span> : <a title="slack_bolt.context.fail.fail.Fail" href="context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> utility function, signal that the custom function failed to complete</p></div>
+</dd>
 <dt id="slack_bolt.Args.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
 <dd>
 <div class="desc"><p>Logger instance</p></div>
@@ -2437,7 +2541,55 @@ <h3>Class variables</h3>
                 proxy=self.client.proxy,
                 ssl=self.client.ssl,
             )
-        return self[&#34;respond&#34;]</code></pre>
+        return self[&#34;respond&#34;]
+
+    @property
+    def complete(self) -&gt; Complete:
+        &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+        any outputs the function returns will be passed along to the next step of its housing workflow,
+        or complete the workflow if the function is the last step in a workflow. Additionally,
+        any interactivity handlers associated to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(ack, complete):
+                ack()
+                complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(context):
+                context.ack()
+                context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        Returns:
+            Callable `complete()` function
+        &#34;&#34;&#34;
+        if &#34;complete&#34; not in self:
+            self[&#34;complete&#34;] = Complete(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;complete&#34;]
+
+    @property
+    def fail(self) -&gt; Fail:
+        &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+        its housing workflow will be interrupted and any provided error message will be passed
+        on to the end user through SlackBot. Additionally, any interactivity handlers associated
+        to a function invocation will no longer be invocable.
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(ack, fail):
+                ack()
+                fail(error=&#34;something went wrong&#34;)
+
+            @app.function(&#34;reverse&#34;)
+            def handle_button_clicks(context):
+                context.ack()
+                context.fail(error=&#34;something went wrong&#34;)
+
+        Returns:
+            Callable `fail()` function
+        &#34;&#34;&#34;
+        if &#34;fail&#34; not in self:
+            self[&#34;fail&#34;] = Fail(client=self.client, function_execution_id=self.function_execution_id)
+        return self[&#34;fail&#34;]</code></pre>
 </details>
 <h3>Ancestors</h3>
 <ul class="hlist">
@@ -2536,6 +2688,100 @@ <h2 id="returns">Returns</h2>
     return self[&#34;client&#34;]</code></pre>
 </details>
 </dd>
+<dt id="slack_bolt.BoltContext.complete"><code class="name">prop <span class="ident">complete</span> : <a title="slack_bolt.context.complete.complete.Complete" href="context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> function for this request. Once a custom function's state is set to complete,
+any outputs the function returns will be passed along to the next step of its housing workflow,
+or complete the workflow if the function is the last step in a workflow. Additionally,
+any interactivity handlers associated to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+def handle_button_clicks(ack, complete):
+    ack()
+    complete(outputs={"stringReverse":"olleh"})
+
+@app.function("reverse")
+def handle_button_clicks(context):
+    context.ack()
+    context.complete(outputs={"stringReverse":"olleh"})
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>complete()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def complete(self) -&gt; Complete:
+    &#34;&#34;&#34;`complete()` function for this request. Once a custom function&#39;s state is set to complete,
+    any outputs the function returns will be passed along to the next step of its housing workflow,
+    or complete the workflow if the function is the last step in a workflow. Additionally,
+    any interactivity handlers associated to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(ack, complete):
+            ack()
+            complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(context):
+            context.ack()
+            context.complete(outputs={&#34;stringReverse&#34;:&#34;olleh&#34;})
+
+    Returns:
+        Callable `complete()` function
+    &#34;&#34;&#34;
+    if &#34;complete&#34; not in self:
+        self[&#34;complete&#34;] = Complete(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;complete&#34;]</code></pre>
+</details>
+</dd>
+<dt id="slack_bolt.BoltContext.fail"><code class="name">prop <span class="ident">fail</span> : <a title="slack_bolt.context.fail.fail.Fail" href="context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> function for this request. Once a custom function's state is set to error,
+its housing workflow will be interrupted and any provided error message will be passed
+on to the end user through SlackBot. Additionally, any interactivity handlers associated
+to a function invocation will no longer be invocable.</p>
+<pre><code>@app.function("reverse")
+def handle_button_clicks(ack, fail):
+    ack()
+    fail(error="something went wrong")
+
+@app.function("reverse")
+def handle_button_clicks(context):
+    context.ack()
+    context.fail(error="something went wrong")
+</code></pre>
+<h2 id="returns">Returns</h2>
+<p>Callable <code>fail()</code> function</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">@property
+def fail(self) -&gt; Fail:
+    &#34;&#34;&#34;`fail()` function for this request. Once a custom function&#39;s state is set to error,
+    its housing workflow will be interrupted and any provided error message will be passed
+    on to the end user through SlackBot. Additionally, any interactivity handlers associated
+    to a function invocation will no longer be invocable.
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(ack, fail):
+            ack()
+            fail(error=&#34;something went wrong&#34;)
+
+        @app.function(&#34;reverse&#34;)
+        def handle_button_clicks(context):
+            context.ack()
+            context.fail(error=&#34;something went wrong&#34;)
+
+    Returns:
+        Callable `fail()` function
+    &#34;&#34;&#34;
+    if &#34;fail&#34; not in self:
+        self[&#34;fail&#34;] = Fail(client=self.client, function_execution_id=self.function_execution_id)
+    return self[&#34;fail&#34;]</code></pre>
+</details>
+</dd>
 <dt id="slack_bolt.BoltContext.respond"><code class="name">prop <span class="ident">respond</span> : Optional[<a title="slack_bolt.context.respond.respond.Respond" href="context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>]</code></dt>
 <dd>
 <div class="desc"><p><code>respond()</code> function for this request.</p>
@@ -2649,6 +2895,9 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.bot_user_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.bot_user_id">bot_user_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.channel_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.channel_id">channel_id</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.enterprise_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.enterprise_id">enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_bot_access_token" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.function_bot_access_token">function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.function_execution_id" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.function_execution_id">function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.context.base_context.BaseContext.inputs" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.inputs">inputs</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.is_enterprise_install" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.is_enterprise_install">is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.logger" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.context.base_context.BaseContext.matches" href="context/base_context.html#slack_bolt.context.base_context.BaseContext.matches">matches</a></code></li>
@@ -2913,6 +3162,57 @@ <h3>Methods</h3>
 </dd>
 </dl>
 </dd>
+<dt id="slack_bolt.Complete"><code class="flex name class">
+<span>class <span class="ident">Complete</span></span>
+<span>(</span><span>client: slack_sdk.web.client.WebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class Complete:
+    client: WebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: WebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    def __call__(self, outputs: Optional[Dict[str, Any]] = None) -&gt; SlackResponse:
+        &#34;&#34;&#34;Signal the successful completion of the custom function.
+
+        Kwargs:
+            outputs: Json serializable object containing the output values
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;complete is unsupported here as there is no function_execution_id&#34;)
+
+        return self.client.functions_completeSuccess(function_execution_id=self.function_execution_id, outputs=outputs or {})</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.Complete.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.Complete.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
 <dt id="slack_bolt.CustomListenerMatcher"><code class="flex name class">
 <span>class <span class="ident">CustomListenerMatcher</span></span>
 <span>(</span><span>*, app_name: str, func: Callable[..., bool], base_logger: Optional[logging.Logger] = None)</span>
@@ -2978,6 +3278,57 @@ <h3>Inherited members</h3>
 </li>
 </ul>
 </dd>
+<dt id="slack_bolt.Fail"><code class="flex name class">
+<span>class <span class="ident">Fail</span></span>
+<span>(</span><span>client: slack_sdk.web.client.WebClient, function_execution_id: Optional[str])</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class Fail:
+    client: WebClient
+    function_execution_id: Optional[str]
+
+    def __init__(
+        self,
+        client: WebClient,
+        function_execution_id: Optional[str],
+    ):
+        self.client = client
+        self.function_execution_id = function_execution_id
+
+    def __call__(self, error: str) -&gt; SlackResponse:
+        &#34;&#34;&#34;Signal that the custom function failed to complete.
+
+        Kwargs:
+            error: Error message to return to slack
+
+        Returns:
+            SlackResponse: The response object returned from slack
+
+        Raises:
+            ValueError: If this function cannot be used.
+        &#34;&#34;&#34;
+        if self.function_execution_id is None:
+            raise ValueError(&#34;fail is unsupported here as there is no function_execution_id&#34;)
+
+        return self.client.functions_completeError(function_execution_id=self.function_execution_id, error=error)</code></pre>
+</details>
+<h3>Class variables</h3>
+<dl>
+<dt id="slack_bolt.Fail.client"><code class="name">var <span class="ident">client</span> : slack_sdk.web.client.WebClient</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.Fail.function_execution_id"><code class="name">var <span class="ident">function_execution_id</span> : Optional[str]</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</dd>
 <dt id="slack_bolt.Listener"><code class="flex name class">
 <span>class <span class="ident">Listener</span></span>
 </code></dt>
@@ -3342,6 +3693,7 @@ <h4><code><a title="slack_bolt.App" href="#slack_bolt.App">App</a></code></h4>
 <li><code><a title="slack_bolt.App.enable_token_revocation_listeners" href="#slack_bolt.App.enable_token_revocation_listeners">enable_token_revocation_listeners</a></code></li>
 <li><code><a title="slack_bolt.App.error" href="#slack_bolt.App.error">error</a></code></li>
 <li><code><a title="slack_bolt.App.event" href="#slack_bolt.App.event">event</a></code></li>
+<li><code><a title="slack_bolt.App.function" href="#slack_bolt.App.function">function</a></code></li>
 <li><code><a title="slack_bolt.App.global_shortcut" href="#slack_bolt.App.global_shortcut">global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.App.installation_store" href="#slack_bolt.App.installation_store">installation_store</a></code></li>
 <li><code><a title="slack_bolt.App.listener_runner" href="#slack_bolt.App.listener_runner">listener_runner</a></code></li>
@@ -3370,8 +3722,10 @@ <h4><code><a title="slack_bolt.Args" href="#slack_bolt.Args">Args</a></code></h4
 <li><code><a title="slack_bolt.Args.body" href="#slack_bolt.Args.body">body</a></code></li>
 <li><code><a title="slack_bolt.Args.client" href="#slack_bolt.Args.client">client</a></code></li>
 <li><code><a title="slack_bolt.Args.command" href="#slack_bolt.Args.command">command</a></code></li>
+<li><code><a title="slack_bolt.Args.complete" href="#slack_bolt.Args.complete">complete</a></code></li>
 <li><code><a title="slack_bolt.Args.context" href="#slack_bolt.Args.context">context</a></code></li>
 <li><code><a title="slack_bolt.Args.event" href="#slack_bolt.Args.event">event</a></code></li>
+<li><code><a title="slack_bolt.Args.fail" href="#slack_bolt.Args.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.Args.logger" href="#slack_bolt.Args.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.Args.message" href="#slack_bolt.Args.message">message</a></code></li>
 <li><code><a title="slack_bolt.Args.next" href="#slack_bolt.Args.next">next</a></code></li>
@@ -3390,9 +3744,11 @@ <h4><code><a title="slack_bolt.Args" href="#slack_bolt.Args">Args</a></code></h4
 </li>
 <li>
 <h4><code><a title="slack_bolt.BoltContext" href="#slack_bolt.BoltContext">BoltContext</a></code></h4>
-<ul class="">
+<ul class="two-column">
 <li><code><a title="slack_bolt.BoltContext.ack" href="#slack_bolt.BoltContext.ack">ack</a></code></li>
 <li><code><a title="slack_bolt.BoltContext.client" href="#slack_bolt.BoltContext.client">client</a></code></li>
+<li><code><a title="slack_bolt.BoltContext.complete" href="#slack_bolt.BoltContext.complete">complete</a></code></li>
+<li><code><a title="slack_bolt.BoltContext.fail" href="#slack_bolt.BoltContext.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.BoltContext.respond" href="#slack_bolt.BoltContext.respond">respond</a></code></li>
 <li><code><a title="slack_bolt.BoltContext.say" href="#slack_bolt.BoltContext.say">say</a></code></li>
 <li><code><a title="slack_bolt.BoltContext.to_copyable" href="#slack_bolt.BoltContext.to_copyable">to_copyable</a></code></li>
@@ -3425,6 +3781,13 @@ <h4><code><a title="slack_bolt.BoltResponse" href="#slack_bolt.BoltResponse">Bol
 </ul>
 </li>
 <li>
+<h4><code><a title="slack_bolt.Complete" href="#slack_bolt.Complete">Complete</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.Complete.client" href="#slack_bolt.Complete.client">client</a></code></li>
+<li><code><a title="slack_bolt.Complete.function_execution_id" href="#slack_bolt.Complete.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+<li>
 <h4><code><a title="slack_bolt.CustomListenerMatcher" href="#slack_bolt.CustomListenerMatcher">CustomListenerMatcher</a></code></h4>
 <ul class="">
 <li><code><a title="slack_bolt.CustomListenerMatcher.app_name" href="#slack_bolt.CustomListenerMatcher.app_name">app_name</a></code></li>
@@ -3434,6 +3797,13 @@ <h4><code><a title="slack_bolt.CustomListenerMatcher" href="#slack_bolt.CustomLi
 </ul>
 </li>
 <li>
+<h4><code><a title="slack_bolt.Fail" href="#slack_bolt.Fail">Fail</a></code></h4>
+<ul class="">
+<li><code><a title="slack_bolt.Fail.client" href="#slack_bolt.Fail.client">client</a></code></li>
+<li><code><a title="slack_bolt.Fail.function_execution_id" href="#slack_bolt.Fail.function_execution_id">function_execution_id</a></code></li>
+</ul>
+</li>
+<li>
 <h4><code><a title="slack_bolt.Listener" href="#slack_bolt.Listener">Listener</a></code></h4>
 <ul class="">
 <li><code><a title="slack_bolt.Listener.ack_function" href="#slack_bolt.Listener.ack_function">ack_function</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/kwargs_injection/args.html b/docs/static/api-docs/slack_bolt/kwargs_injection/args.html
index f7376736c..f555b3aff 100644
--- a/docs/static/api-docs/slack_bolt/kwargs_injection/args.html
+++ b/docs/static/api-docs/slack_bolt/kwargs_injection/args.html
@@ -37,7 +37,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
 <dt id="slack_bolt.kwargs_injection.args.Args"><code class="flex name class">
 <span>class <span class="ident">Args</span></span>
-<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.client.WebClient, req: <a title="slack_bolt.request.request.BoltRequest" href="../request/request.html#slack_bolt.request.request.BoltRequest">BoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.context.BoltContext" href="../context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.ack.Ack" href="../context/ack/ack.html#slack_bolt.context.ack.ack.Ack">Ack</a>, say: <a title="slack_bolt.context.say.say.Say" href="../context/say/say.html#slack_bolt.context.say.say.Say">Say</a>, respond: <a title="slack_bolt.context.respond.respond.Respond" href="../context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>, next: Callable[[], None], **kwargs)</span>
+<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.client.WebClient, req: <a title="slack_bolt.request.request.BoltRequest" href="../request/request.html#slack_bolt.request.request.BoltRequest">BoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.context.BoltContext" href="../context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.ack.Ack" href="../context/ack/ack.html#slack_bolt.context.ack.ack.Ack">Ack</a>, say: <a title="slack_bolt.context.say.say.Say" href="../context/say/say.html#slack_bolt.context.say.say.Say">Say</a>, respond: <a title="slack_bolt.context.respond.respond.Respond" href="../context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>, complete: <a title="slack_bolt.context.complete.complete.Complete" href="../context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a>, fail: <a title="slack_bolt.context.fail.fail.Fail" href="../context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a>, next: Callable[[], None], **kwargs)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>All the arguments in this class are available in any middleware / listeners.
@@ -139,6 +139,10 @@ <h2 class="section-title" id="header-classes">Classes</h2>
     &#34;&#34;&#34;`say()` utility function, which calls `chat.postMessage` API with the associated channel ID&#34;&#34;&#34;
     respond: Respond
     &#34;&#34;&#34;`respond()` utility function, which utilizes the associated `response_url`&#34;&#34;&#34;
+    complete: Complete
+    &#34;&#34;&#34;`complete()` utility function, signals a successful completion of the custom function&#34;&#34;&#34;
+    fail: Fail
+    &#34;&#34;&#34;`fail()` utility function, signal that the custom function failed to complete&#34;&#34;&#34;
     # middleware
     next: Callable[[], None]
     &#34;&#34;&#34;`next()` utility function, which tells the middleware chain that it can continue with the next one&#34;&#34;&#34;
@@ -165,6 +169,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         ack: Ack,
         say: Say,
         respond: Respond,
+        complete: Complete,
+        fail: Fail,
         # As this method is not supposed to be invoked by bolt-python users,
         # the naming conflict with the built-in one affects
         # only the internals of this method
@@ -190,6 +196,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         self.ack: Ack = ack
         self.say: Say = say
         self.respond: Respond = respond
+        self.complete: Complete = complete
+        self.fail: Fail = fail
         self.next: Callable[[], None] = next
         self.next_: Callable[[], None] = next</code></pre>
 </details>
@@ -215,6 +223,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.command</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.kwargs_injection.args.Args.complete"><code class="name">var <span class="ident">complete</span> : <a title="slack_bolt.context.complete.complete.Complete" href="../context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> utility function, signals a successful completion of the custom function</p></div>
+</dd>
 <dt id="slack_bolt.kwargs_injection.args.Args.context"><code class="name">var <span class="ident">context</span> : <a title="slack_bolt.context.context.BoltContext" href="../context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a></code></dt>
 <dd>
 <div class="desc"><p>Context data associated with the incoming request</p></div>
@@ -223,6 +235,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.event</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.kwargs_injection.args.Args.fail"><code class="name">var <span class="ident">fail</span> : <a title="slack_bolt.context.fail.fail.Fail" href="../context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> utility function, signal that the custom function failed to complete</p></div>
+</dd>
 <dt id="slack_bolt.kwargs_injection.args.Args.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
 <dd>
 <div class="desc"><p>Logger instance</p></div>
@@ -304,8 +320,10 @@ <h4><code><a title="slack_bolt.kwargs_injection.args.Args" href="#slack_bolt.kwa
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.body" href="#slack_bolt.kwargs_injection.args.Args.body">body</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.client" href="#slack_bolt.kwargs_injection.args.Args.client">client</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.command" href="#slack_bolt.kwargs_injection.args.Args.command">command</a></code></li>
+<li><code><a title="slack_bolt.kwargs_injection.args.Args.complete" href="#slack_bolt.kwargs_injection.args.Args.complete">complete</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.context" href="#slack_bolt.kwargs_injection.args.Args.context">context</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.event" href="#slack_bolt.kwargs_injection.args.Args.event">event</a></code></li>
+<li><code><a title="slack_bolt.kwargs_injection.args.Args.fail" href="#slack_bolt.kwargs_injection.args.Args.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.logger" href="#slack_bolt.kwargs_injection.args.Args.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.message" href="#slack_bolt.kwargs_injection.args.Args.message">message</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.args.Args.next" href="#slack_bolt.kwargs_injection.args.Args.next">next</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/kwargs_injection/async_args.html b/docs/static/api-docs/slack_bolt/kwargs_injection/async_args.html
index 0f372a3c5..cf0dfc308 100644
--- a/docs/static/api-docs/slack_bolt/kwargs_injection/async_args.html
+++ b/docs/static/api-docs/slack_bolt/kwargs_injection/async_args.html
@@ -37,7 +37,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
 <dt id="slack_bolt.kwargs_injection.async_args.AsyncArgs"><code class="flex name class">
 <span>class <span class="ident">AsyncArgs</span></span>
-<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.async_client.AsyncWebClient, req: <a title="slack_bolt.request.async_request.AsyncBoltRequest" href="../request/async_request.html#slack_bolt.request.async_request.AsyncBoltRequest">AsyncBoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.async_context.AsyncBoltContext" href="../context/async_context.html#slack_bolt.context.async_context.AsyncBoltContext">AsyncBoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.async_ack.AsyncAck" href="../context/ack/async_ack.html#slack_bolt.context.ack.async_ack.AsyncAck">AsyncAck</a>, say: <a title="slack_bolt.context.say.async_say.AsyncSay" href="../context/say/async_say.html#slack_bolt.context.say.async_say.AsyncSay">AsyncSay</a>, respond: <a title="slack_bolt.context.respond.async_respond.AsyncRespond" href="../context/respond/async_respond.html#slack_bolt.context.respond.async_respond.AsyncRespond">AsyncRespond</a>, next: Callable[[], Awaitable[None]], **kwargs)</span>
+<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.async_client.AsyncWebClient, req: <a title="slack_bolt.request.async_request.AsyncBoltRequest" href="../request/async_request.html#slack_bolt.request.async_request.AsyncBoltRequest">AsyncBoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.async_context.AsyncBoltContext" href="../context/async_context.html#slack_bolt.context.async_context.AsyncBoltContext">AsyncBoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.async_ack.AsyncAck" href="../context/ack/async_ack.html#slack_bolt.context.ack.async_ack.AsyncAck">AsyncAck</a>, say: <a title="slack_bolt.context.say.async_say.AsyncSay" href="../context/say/async_say.html#slack_bolt.context.say.async_say.AsyncSay">AsyncSay</a>, respond: <a title="slack_bolt.context.respond.async_respond.AsyncRespond" href="../context/respond/async_respond.html#slack_bolt.context.respond.async_respond.AsyncRespond">AsyncRespond</a>, complete: <a title="slack_bolt.context.complete.async_complete.AsyncComplete" href="../context/complete/async_complete.html#slack_bolt.context.complete.async_complete.AsyncComplete">AsyncComplete</a>, fail: <a title="slack_bolt.context.fail.async_fail.AsyncFail" href="../context/fail/async_fail.html#slack_bolt.context.fail.async_fail.AsyncFail">AsyncFail</a>, next: Callable[[], Awaitable[None]], **kwargs)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>All the arguments in this class are available in any middleware / listeners.
@@ -139,6 +139,10 @@ <h2 class="section-title" id="header-classes">Classes</h2>
     &#34;&#34;&#34;`say()` utility function, which calls chat.postMessage API with the associated channel ID&#34;&#34;&#34;
     respond: AsyncRespond
     &#34;&#34;&#34;`respond()` utility function, which utilizes the associated `response_url`&#34;&#34;&#34;
+    complete: AsyncComplete
+    &#34;&#34;&#34;`complete()` utility function, signals a successful completion of the custom function&#34;&#34;&#34;
+    fail: AsyncFail
+    &#34;&#34;&#34;`fail()` utility function, signal that the custom function failed to complete&#34;&#34;&#34;
     # middleware
     next: Callable[[], Awaitable[None]]
     &#34;&#34;&#34;`next()` utility function, which tells the middleware chain that it can continue with the next one&#34;&#34;&#34;
@@ -165,6 +169,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         ack: AsyncAck,
         say: AsyncSay,
         respond: AsyncRespond,
+        complete: AsyncComplete,
+        fail: AsyncFail,
         next: Callable[[], Awaitable[None]],
         **kwargs  # noqa
     ):
@@ -187,6 +193,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         self.ack: AsyncAck = ack
         self.say: AsyncSay = say
         self.respond: AsyncRespond = respond
+        self.complete: AsyncComplete = complete
+        self.fail: AsyncFail = fail
         self.next: Callable[[], Awaitable[None]] = next
         self.next_: Callable[[], Awaitable[None]] = next</code></pre>
 </details>
@@ -212,6 +220,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.command</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.kwargs_injection.async_args.AsyncArgs.complete"><code class="name">var <span class="ident">complete</span> : <a title="slack_bolt.context.complete.async_complete.AsyncComplete" href="../context/complete/async_complete.html#slack_bolt.context.complete.async_complete.AsyncComplete">AsyncComplete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> utility function, signals a successful completion of the custom function</p></div>
+</dd>
 <dt id="slack_bolt.kwargs_injection.async_args.AsyncArgs.context"><code class="name">var <span class="ident">context</span> : <a title="slack_bolt.context.async_context.AsyncBoltContext" href="../context/async_context.html#slack_bolt.context.async_context.AsyncBoltContext">AsyncBoltContext</a></code></dt>
 <dd>
 <div class="desc"><p>Context data associated with the incoming request</p></div>
@@ -220,6 +232,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.event</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.kwargs_injection.async_args.AsyncArgs.fail"><code class="name">var <span class="ident">fail</span> : <a title="slack_bolt.context.fail.async_fail.AsyncFail" href="../context/fail/async_fail.html#slack_bolt.context.fail.async_fail.AsyncFail">AsyncFail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> utility function, signal that the custom function failed to complete</p></div>
+</dd>
 <dt id="slack_bolt.kwargs_injection.async_args.AsyncArgs.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
 <dd>
 <div class="desc"><p>Logger instance</p></div>
@@ -301,8 +317,10 @@ <h4><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs" href="#sla
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.body" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.body">body</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.client" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.client">client</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.command" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.command">command</a></code></li>
+<li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.complete" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.complete">complete</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.context" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.context">context</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.event" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.event">event</a></code></li>
+<li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.fail" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.logger" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.message" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.message">message</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.async_args.AsyncArgs.next" href="#slack_bolt.kwargs_injection.async_args.AsyncArgs.next">next</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/kwargs_injection/index.html b/docs/static/api-docs/slack_bolt/kwargs_injection/index.html
index e7d553805..934e9289c 100644
--- a/docs/static/api-docs/slack_bolt/kwargs_injection/index.html
+++ b/docs/static/api-docs/slack_bolt/kwargs_injection/index.html
@@ -27,7 +27,7 @@ <h1 class="title">Module <code>slack_bolt.kwargs_injection</code></h1>
 <section id="section-intro">
 <p>For middleware/listener arguments, Bolt does flexible data injection in accordance with their names.</p>
 <p>To learn the available arguments, check <code><a title="slack_bolt.kwargs_injection.args" href="args.html">slack_bolt.kwargs_injection.args</a></code>'s API document.
-For Workflow steps, checking <code><a title="slack_bolt.workflows.step.utilities" href="../workflows/step/utilities/index.html">slack_bolt.workflows.step.utilities</a></code> as well should be helpful.</p>
+For steps from apps, checking <code><a title="slack_bolt.workflows.step.utilities" href="../workflows/step/utilities/index.html">slack_bolt.workflows.step.utilities</a></code> as well should be helpful.</p>
 </section>
 <section>
 <h2 class="section-title" id="header-submodules">Sub-modules</h2>
@@ -68,7 +68,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
 <dt id="slack_bolt.kwargs_injection.Args"><code class="flex name class">
 <span>class <span class="ident">Args</span></span>
-<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.client.WebClient, req: <a title="slack_bolt.request.request.BoltRequest" href="../request/request.html#slack_bolt.request.request.BoltRequest">BoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.context.BoltContext" href="../context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.ack.Ack" href="../context/ack/ack.html#slack_bolt.context.ack.ack.Ack">Ack</a>, say: <a title="slack_bolt.context.say.say.Say" href="../context/say/say.html#slack_bolt.context.say.say.Say">Say</a>, respond: <a title="slack_bolt.context.respond.respond.Respond" href="../context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>, next: Callable[[], None], **kwargs)</span>
+<span>(</span><span>*, logger: logging.Logger, client: slack_sdk.web.client.WebClient, req: <a title="slack_bolt.request.request.BoltRequest" href="../request/request.html#slack_bolt.request.request.BoltRequest">BoltRequest</a>, resp: <a title="slack_bolt.response.response.BoltResponse" href="../response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a>, context: <a title="slack_bolt.context.context.BoltContext" href="../context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a>, body: Dict[str, Any], payload: Dict[str, Any], options: Optional[Dict[str, Any]] = None, shortcut: Optional[Dict[str, Any]] = None, action: Optional[Dict[str, Any]] = None, view: Optional[Dict[str, Any]] = None, command: Optional[Dict[str, Any]] = None, event: Optional[Dict[str, Any]] = None, message: Optional[Dict[str, Any]] = None, ack: <a title="slack_bolt.context.ack.ack.Ack" href="../context/ack/ack.html#slack_bolt.context.ack.ack.Ack">Ack</a>, say: <a title="slack_bolt.context.say.say.Say" href="../context/say/say.html#slack_bolt.context.say.say.Say">Say</a>, respond: <a title="slack_bolt.context.respond.respond.Respond" href="../context/respond/respond.html#slack_bolt.context.respond.respond.Respond">Respond</a>, complete: <a title="slack_bolt.context.complete.complete.Complete" href="../context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a>, fail: <a title="slack_bolt.context.fail.fail.Fail" href="../context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a>, next: Callable[[], None], **kwargs)</span>
 </code></dt>
 <dd>
 <div class="desc"><p>All the arguments in this class are available in any middleware / listeners.
@@ -170,6 +170,10 @@ <h2 class="section-title" id="header-classes">Classes</h2>
     &#34;&#34;&#34;`say()` utility function, which calls `chat.postMessage` API with the associated channel ID&#34;&#34;&#34;
     respond: Respond
     &#34;&#34;&#34;`respond()` utility function, which utilizes the associated `response_url`&#34;&#34;&#34;
+    complete: Complete
+    &#34;&#34;&#34;`complete()` utility function, signals a successful completion of the custom function&#34;&#34;&#34;
+    fail: Fail
+    &#34;&#34;&#34;`fail()` utility function, signal that the custom function failed to complete&#34;&#34;&#34;
     # middleware
     next: Callable[[], None]
     &#34;&#34;&#34;`next()` utility function, which tells the middleware chain that it can continue with the next one&#34;&#34;&#34;
@@ -196,6 +200,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         ack: Ack,
         say: Say,
         respond: Respond,
+        complete: Complete,
+        fail: Fail,
         # As this method is not supposed to be invoked by bolt-python users,
         # the naming conflict with the built-in one affects
         # only the internals of this method
@@ -221,6 +227,8 @@ <h2 class="section-title" id="header-classes">Classes</h2>
         self.ack: Ack = ack
         self.say: Say = say
         self.respond: Respond = respond
+        self.complete: Complete = complete
+        self.fail: Fail = fail
         self.next: Callable[[], None] = next
         self.next_: Callable[[], None] = next</code></pre>
 </details>
@@ -246,6 +254,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.command</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.kwargs_injection.Args.complete"><code class="name">var <span class="ident">complete</span> : <a title="slack_bolt.context.complete.complete.Complete" href="../context/complete/complete.html#slack_bolt.context.complete.complete.Complete">Complete</a></code></dt>
+<dd>
+<div class="desc"><p><code>complete()</code> utility function, signals a successful completion of the custom function</p></div>
+</dd>
 <dt id="slack_bolt.kwargs_injection.Args.context"><code class="name">var <span class="ident">context</span> : <a title="slack_bolt.context.context.BoltContext" href="../context/context.html#slack_bolt.context.context.BoltContext">BoltContext</a></code></dt>
 <dd>
 <div class="desc"><p>Context data associated with the incoming request</p></div>
@@ -254,6 +266,10 @@ <h3>Class variables</h3>
 <dd>
 <div class="desc"><p>An alias for payload in an <code>@app.event</code> listener</p></div>
 </dd>
+<dt id="slack_bolt.kwargs_injection.Args.fail"><code class="name">var <span class="ident">fail</span> : <a title="slack_bolt.context.fail.fail.Fail" href="../context/fail/fail.html#slack_bolt.context.fail.fail.Fail">Fail</a></code></dt>
+<dd>
+<div class="desc"><p><code>fail()</code> utility function, signal that the custom function failed to complete</p></div>
+</dd>
 <dt id="slack_bolt.kwargs_injection.Args.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
 <dd>
 <div class="desc"><p>Logger instance</p></div>
@@ -348,8 +364,10 @@ <h4><code><a title="slack_bolt.kwargs_injection.Args" href="#slack_bolt.kwargs_i
 <li><code><a title="slack_bolt.kwargs_injection.Args.body" href="#slack_bolt.kwargs_injection.Args.body">body</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.client" href="#slack_bolt.kwargs_injection.Args.client">client</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.command" href="#slack_bolt.kwargs_injection.Args.command">command</a></code></li>
+<li><code><a title="slack_bolt.kwargs_injection.Args.complete" href="#slack_bolt.kwargs_injection.Args.complete">complete</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.context" href="#slack_bolt.kwargs_injection.Args.context">context</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.event" href="#slack_bolt.kwargs_injection.Args.event">event</a></code></li>
+<li><code><a title="slack_bolt.kwargs_injection.Args.fail" href="#slack_bolt.kwargs_injection.Args.fail">fail</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.logger" href="#slack_bolt.kwargs_injection.Args.logger">logger</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.message" href="#slack_bolt.kwargs_injection.Args.message">message</a></code></li>
 <li><code><a title="slack_bolt.kwargs_injection.Args.next" href="#slack_bolt.kwargs_injection.Args.next">next</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/listener_matcher/builtins.html b/docs/static/api-docs/slack_bolt/listener_matcher/builtins.html
index d9952f913..0f56fe8ad 100644
--- a/docs/static/api-docs/slack_bolt/listener_matcher/builtins.html
+++ b/docs/static/api-docs/slack_bolt/listener_matcher/builtins.html
@@ -93,6 +93,12 @@ <h2 class="section-title" id="header-functions">Functions</h2>
 <dd>
 <div class="desc"></div>
 </dd>
+<dt id="slack_bolt.listener_matcher.builtins.function_executed"><code class="name flex">
+<span>def <span class="ident">function_executed</span></span>(<span>callback_id: Union[str, re.Pattern], asyncio: bool = False, base_logger: Optional[logging.Logger] = None)</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
 <dt id="slack_bolt.listener_matcher.builtins.global_shortcut"><code class="name flex">
 <span>def <span class="ident">global_shortcut</span></span>(<span>callback_id: Union[str, re.Pattern], asyncio: bool = False, base_logger: Optional[logging.Logger] = None)</span>
 </code></dt>
@@ -238,6 +244,7 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.listener_matcher.builtins.dialog_submission" href="#slack_bolt.listener_matcher.builtins.dialog_submission">dialog_submission</a></code></li>
 <li><code><a title="slack_bolt.listener_matcher.builtins.dialog_suggestion" href="#slack_bolt.listener_matcher.builtins.dialog_suggestion">dialog_suggestion</a></code></li>
 <li><code><a title="slack_bolt.listener_matcher.builtins.event" href="#slack_bolt.listener_matcher.builtins.event">event</a></code></li>
+<li><code><a title="slack_bolt.listener_matcher.builtins.function_executed" href="#slack_bolt.listener_matcher.builtins.function_executed">function_executed</a></code></li>
 <li><code><a title="slack_bolt.listener_matcher.builtins.global_shortcut" href="#slack_bolt.listener_matcher.builtins.global_shortcut">global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.listener_matcher.builtins.message_event" href="#slack_bolt.listener_matcher.builtins.message_event">message_event</a></code></li>
 <li><code><a title="slack_bolt.listener_matcher.builtins.message_shortcut" href="#slack_bolt.listener_matcher.builtins.message_shortcut">message_shortcut</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/middleware/async_builtins.html b/docs/static/api-docs/slack_bolt/middleware/async_builtins.html
index 50ef843a6..b13852d2f 100644
--- a/docs/static/api-docs/slack_bolt/middleware/async_builtins.html
+++ b/docs/static/api-docs/slack_bolt/middleware/async_builtins.html
@@ -35,6 +35,43 @@ <h1 class="title">Module <code>slack_bolt.middleware.async_builtins</code></h1>
 <section>
 <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
+<dt id="slack_bolt.middleware.async_builtins.AsyncAttachingFunctionToken"><code class="flex name class">
+<span>class <span class="ident">AsyncAttachingFunctionToken</span></span>
+</code></dt>
+<dd>
+<div class="desc"><p>A middleware can process request data before other middleware and listener functions.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AsyncAttachingFunctionToken(AsyncMiddleware):  # type: ignore
+    async def async_process(
+        self,
+        *,
+        req: AsyncBoltRequest,
+        resp: BoltResponse,
+        # This method is not supposed to be invoked by bolt-python users
+        next: Callable[[], Awaitable[BoltResponse]],
+    ) -&gt; BoltResponse:
+        if req.context.function_bot_access_token is not None:
+            req.context.client.token = req.context.function_bot_access_token
+
+        return await next()</code></pre>
+</details>
+<h3>Ancestors</h3>
+<ul class="hlist">
+<li><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a></li>
+</ul>
+<h3>Inherited members</h3>
+<ul class="hlist">
+<li><code><b><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a></b></code>:
+<ul class="hlist">
+<li><code><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware.async_process" href="async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware.async_process">async_process</a></code></li>
+<li><code><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware.name" href="async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware.name">name</a></code></li>
+</ul>
+</li>
+</ul>
+</dd>
 <dt id="slack_bolt.middleware.async_builtins.AsyncIgnoringSelfEvents"><code class="flex name class">
 <span>class <span class="ident">AsyncIgnoringSelfEvents</span></span>
 <span>(</span><span>base_logger: Optional[logging.Logger] = None)</span>
@@ -254,17 +291,6 @@ <h3>Ancestors</h3>
 <li><a title="slack_bolt.middleware.middleware.Middleware" href="middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></li>
 <li><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.middleware.async_builtins.AsyncSslCheck.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.middleware.async_builtins.AsyncSslCheck.verification_token"><code class="name">var <span class="ident">verification_token</span> : Optional[str]</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.middleware.ssl_check.ssl_check.SslCheck" href="ssl_check/ssl_check.html#slack_bolt.middleware.ssl_check.ssl_check.SslCheck">SslCheck</a></b></code>:
@@ -350,6 +376,9 @@ <h3>Inherited members</h3>
 <li><h3><a href="#header-classes">Classes</a></h3>
 <ul>
 <li>
+<h4><code><a title="slack_bolt.middleware.async_builtins.AsyncAttachingFunctionToken" href="#slack_bolt.middleware.async_builtins.AsyncAttachingFunctionToken">AsyncAttachingFunctionToken</a></code></h4>
+</li>
+<li>
 <h4><code><a title="slack_bolt.middleware.async_builtins.AsyncIgnoringSelfEvents" href="#slack_bolt.middleware.async_builtins.AsyncIgnoringSelfEvents">AsyncIgnoringSelfEvents</a></code></h4>
 </li>
 <li>
@@ -360,10 +389,6 @@ <h4><code><a title="slack_bolt.middleware.async_builtins.AsyncRequestVerificatio
 </li>
 <li>
 <h4><code><a title="slack_bolt.middleware.async_builtins.AsyncSslCheck" href="#slack_bolt.middleware.async_builtins.AsyncSslCheck">AsyncSslCheck</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.middleware.async_builtins.AsyncSslCheck.logger" href="#slack_bolt.middleware.async_builtins.AsyncSslCheck.logger">logger</a></code></li>
-<li><code><a title="slack_bolt.middleware.async_builtins.AsyncSslCheck.verification_token" href="#slack_bolt.middleware.async_builtins.AsyncSslCheck.verification_token">verification_token</a></code></li>
-</ul>
 </li>
 <li>
 <h4><code><a title="slack_bolt.middleware.async_builtins.AsyncUrlVerification" href="#slack_bolt.middleware.async_builtins.AsyncUrlVerification">AsyncUrlVerification</a></code></h4>
diff --git a/docs/static/api-docs/slack_bolt/middleware/async_middleware.html b/docs/static/api-docs/slack_bolt/middleware/async_middleware.html
index 2f48b71fb..f7189ad2b 100644
--- a/docs/static/api-docs/slack_bolt/middleware/async_middleware.html
+++ b/docs/static/api-docs/slack_bolt/middleware/async_middleware.html
@@ -92,6 +92,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <h3>Subclasses</h3>
 <ul class="hlist">
 <li><a title="slack_bolt.middleware.async_custom_middleware.AsyncCustomMiddleware" href="async_custom_middleware.html#slack_bolt.middleware.async_custom_middleware.AsyncCustomMiddleware">AsyncCustomMiddleware</a></li>
+<li><a title="slack_bolt.middleware.attaching_function_token.async_attaching_function_token.AsyncAttachingFunctionToken" href="attaching_function_token/async_attaching_function_token.html#slack_bolt.middleware.attaching_function_token.async_attaching_function_token.AsyncAttachingFunctionToken">AsyncAttachingFunctionToken</a></li>
 <li><a title="slack_bolt.middleware.authorization.async_authorization.AsyncAuthorization" href="authorization/async_authorization.html#slack_bolt.middleware.authorization.async_authorization.AsyncAuthorization">AsyncAuthorization</a></li>
 <li><a title="slack_bolt.middleware.ignoring_self_events.async_ignoring_self_events.AsyncIgnoringSelfEvents" href="ignoring_self_events/async_ignoring_self_events.html#slack_bolt.middleware.ignoring_self_events.async_ignoring_self_events.AsyncIgnoringSelfEvents">AsyncIgnoringSelfEvents</a></li>
 <li><a title="slack_bolt.middleware.message_listener_matches.async_message_listener_matches.AsyncMessageListenerMatches" href="message_listener_matches/async_message_listener_matches.html#slack_bolt.middleware.message_listener_matches.async_message_listener_matches.AsyncMessageListenerMatches">AsyncMessageListenerMatches</a></li>
diff --git a/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/async_attaching_function_token.html b/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/async_attaching_function_token.html
new file mode 100644
index 000000000..7f330bd97
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/async_attaching_function_token.html
@@ -0,0 +1,102 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.middleware.attaching_function_token.async_attaching_function_token API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.middleware.attaching_function_token.async_attaching_function_token</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.middleware.attaching_function_token.async_attaching_function_token.AsyncAttachingFunctionToken"><code class="flex name class">
+<span>class <span class="ident">AsyncAttachingFunctionToken</span></span>
+</code></dt>
+<dd>
+<div class="desc"><p>A middleware can process request data before other middleware and listener functions.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AsyncAttachingFunctionToken(AsyncMiddleware):  # type: ignore
+    async def async_process(
+        self,
+        *,
+        req: AsyncBoltRequest,
+        resp: BoltResponse,
+        # This method is not supposed to be invoked by bolt-python users
+        next: Callable[[], Awaitable[BoltResponse]],
+    ) -&gt; BoltResponse:
+        if req.context.function_bot_access_token is not None:
+            req.context.client.token = req.context.function_bot_access_token
+
+        return await next()</code></pre>
+</details>
+<h3>Ancestors</h3>
+<ul class="hlist">
+<li><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a></li>
+</ul>
+<h3>Inherited members</h3>
+<ul class="hlist">
+<li><code><b><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a></b></code>:
+<ul class="hlist">
+<li><code><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware.async_process" href="../async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware.async_process">async_process</a></code></li>
+<li><code><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware.name" href="../async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware.name">name</a></code></li>
+</ul>
+</li>
+</ul>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.middleware.attaching_function_token" href="index.html">slack_bolt.middleware.attaching_function_token</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.middleware.attaching_function_token.async_attaching_function_token.AsyncAttachingFunctionToken" href="#slack_bolt.middleware.attaching_function_token.async_attaching_function_token.AsyncAttachingFunctionToken">AsyncAttachingFunctionToken</a></code></h4>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/attaching_function_token.html b/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/attaching_function_token.html
new file mode 100644
index 000000000..d49a4820f
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/attaching_function_token.html
@@ -0,0 +1,102 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.middleware.attaching_function_token.attaching_function_token API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
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+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.middleware.attaching_function_token.attaching_function_token</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken"><code class="flex name class">
+<span>class <span class="ident">AttachingFunctionToken</span></span>
+</code></dt>
+<dd>
+<div class="desc"><p>A middleware can process request data before other middleware and listener functions.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AttachingFunctionToken(Middleware):  # type: ignore
+    def process(
+        self,
+        *,
+        req: BoltRequest,
+        resp: BoltResponse,
+        # This method is not supposed to be invoked by bolt-python users
+        next: Callable[[], BoltResponse],
+    ) -&gt; BoltResponse:
+        if req.context.function_bot_access_token is not None:
+            req.context.client.token = req.context.function_bot_access_token
+
+        return next()</code></pre>
+</details>
+<h3>Ancestors</h3>
+<ul class="hlist">
+<li><a title="slack_bolt.middleware.middleware.Middleware" href="../middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></li>
+</ul>
+<h3>Inherited members</h3>
+<ul class="hlist">
+<li><code><b><a title="slack_bolt.middleware.middleware.Middleware" href="../middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></b></code>:
+<ul class="hlist">
+<li><code><a title="slack_bolt.middleware.middleware.Middleware.name" href="../middleware.html#slack_bolt.middleware.middleware.Middleware.name">name</a></code></li>
+<li><code><a title="slack_bolt.middleware.middleware.Middleware.process" href="../middleware.html#slack_bolt.middleware.middleware.Middleware.process">process</a></code></li>
+</ul>
+</li>
+</ul>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.middleware.attaching_function_token" href="index.html">slack_bolt.middleware.attaching_function_token</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken" href="#slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken">AttachingFunctionToken</a></code></h4>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/index.html b/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/index.html
new file mode 100644
index 000000000..627bb5124
--- /dev/null
+++ b/docs/static/api-docs/slack_bolt/middleware/attaching_function_token/index.html
@@ -0,0 +1,119 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
+<meta name="generator" content="pdoc3 0.11.1">
+<title>slack_bolt.middleware.attaching_function_token API documentation</title>
+<meta name="description" content="">
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
+<style>:root{--highlight-color:#fe9}.flex{display:flex !important}body{line-height:1.5em}#content{padding:20px}#sidebar{padding:1.5em;overflow:hidden}#sidebar > *:last-child{margin-bottom:2cm}.http-server-breadcrumbs{font-size:130%;margin:0 0 15px 0}#footer{font-size:.75em;padding:5px 30px;border-top:1px solid #ddd;text-align:right}#footer p{margin:0 0 0 1em;display:inline-block}#footer p:last-child{margin-right:30px}h1,h2,h3,h4,h5{font-weight:300}h1{font-size:2.5em;line-height:1.1em}h2{font-size:1.75em;margin:2em 0 .50em 0}h3{font-size:1.4em;margin:1.6em 0 .7em 0}h4{margin:0;font-size:105%}h1:target,h2:target,h3:target,h4:target,h5:target,h6:target{background:var(--highlight-color);padding:.2em 0}a{color:#058;text-decoration:none;transition:color .2s ease-in-out}a:visited{color:#503}a:hover{color:#b62}.title code{font-weight:bold}h2[id^="header-"]{margin-top:2em}.ident{color:#900;font-weight:bold}pre code{font-size:.8em;line-height:1.4em;padding:1em;display:block}code{background:#f3f3f3;font-family:"DejaVu Sans Mono",monospace;padding:1px 4px;overflow-wrap:break-word}h1 code{background:transparent}pre{border-top:1px solid #ccc;border-bottom:1px solid #ccc;margin:1em 0}#http-server-module-list{display:flex;flex-flow:column}#http-server-module-list div{display:flex}#http-server-module-list dt{min-width:10%}#http-server-module-list p{margin-top:0}.toc ul,#index{list-style-type:none;margin:0;padding:0}#index code{background:transparent}#index h3{border-bottom:1px solid #ddd}#index ul{padding:0}#index h4{margin-top:.6em;font-weight:bold}@media (min-width:200ex){#index .two-column{column-count:2}}@media (min-width:300ex){#index .two-column{column-count:3}}dl{margin-bottom:2em}dl dl:last-child{margin-bottom:4em}dd{margin:0 0 1em 3em}#header-classes + dl > dd{margin-bottom:3em}dd dd{margin-left:2em}dd p{margin:10px 0}.name{background:#eee;font-size:.85em;padding:5px 10px;display:inline-block;min-width:40%}.name:hover{background:#e0e0e0}dt:target .name{background:var(--highlight-color)}.name > span:first-child{white-space:nowrap}.name.class > span:nth-child(2){margin-left:.4em}.inherited{color:#999;border-left:5px solid #eee;padding-left:1em}.inheritance em{font-style:normal;font-weight:bold}.desc h2{font-weight:400;font-size:1.25em}.desc h3{font-size:1em}.desc dt code{background:inherit}.source summary,.git-link-div{color:#666;text-align:right;font-weight:400;font-size:.8em;text-transform:uppercase}.source summary > *{white-space:nowrap;cursor:pointer}.git-link{color:inherit;margin-left:1em}.source pre{max-height:500px;overflow:auto;margin:0}.source pre code{font-size:12px;overflow:visible}.hlist{list-style:none}.hlist li{display:inline}.hlist li:after{content:',\2002'}.hlist li:last-child:after{content:none}.hlist .hlist{display:inline;padding-left:1em}img{max-width:100%}td{padding:0 .5em}.admonition{padding:.1em 1em;margin-bottom:1em}.admonition-title{font-weight:bold}.admonition.note,.admonition.info,.admonition.important{background:#aef}.admonition.todo,.admonition.versionadded,.admonition.tip,.admonition.hint{background:#dfd}.admonition.warning,.admonition.versionchanged,.admonition.deprecated{background:#fd4}.admonition.error,.admonition.danger,.admonition.caution{background:lightpink}</style>
+<style media="screen and (min-width: 700px)">@media screen and (min-width:700px){#sidebar{width:30%;height:100vh;overflow:auto;position:sticky;top:0}#content{width:70%;max-width:100ch;padding:3em 4em;border-left:1px solid #ddd}pre code{font-size:1em}.name{font-size:1em}main{display:flex;flex-direction:row-reverse;justify-content:flex-end}.toc ul ul,#index ul ul{padding-left:1em}.toc > ul > li{margin-top:.5em}}</style>
+<style media="print">@media print{#sidebar h1{page-break-before:always}.source{display:none}}@media print{*{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}a[href]:after{content:" (" attr(href) ")";font-size:90%}a[href][title]:after{content:none}abbr[title]:after{content:" (" attr(title) ")"}.ir a:after,a[href^="javascript:"]:after,a[href^="#"]:after{content:""}pre,blockquote{border:1px solid #999;page-break-inside:avoid}thead{display:table-header-group}tr,img{page-break-inside:avoid}img{max-width:100% !important}@page{margin:0.5cm}p,h2,h3{orphans:3;widows:3}h1,h2,h3,h4,h5,h6{page-break-after:avoid}}</style>
+<script defer src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js" integrity="sha512-D9gUyxqja7hBtkWpPWGt9wfbfaMGVt9gnyCvYa+jojwwPHLCzUm5i8rpk7vD7wNee9bA35eYIjobYPaQuKS1MQ==" crossorigin></script>
+<script>window.addEventListener('DOMContentLoaded', () => {
+hljs.configure({languages: ['bash', 'css', 'diff', 'graphql', 'ini', 'javascript', 'json', 'plaintext', 'python', 'python-repl', 'rust', 'shell', 'sql', 'typescript', 'xml', 'yaml']});
+hljs.highlightAll();
+})</script>
+</head>
+<body>
+<main>
+<article id="content">
+<header>
+<h1 class="title">Module <code>slack_bolt.middleware.attaching_function_token</code></h1>
+</header>
+<section id="section-intro">
+</section>
+<section>
+<h2 class="section-title" id="header-submodules">Sub-modules</h2>
+<dl>
+<dt><code class="name"><a title="slack_bolt.middleware.attaching_function_token.async_attaching_function_token" href="async_attaching_function_token.html">slack_bolt.middleware.attaching_function_token.async_attaching_function_token</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt><code class="name"><a title="slack_bolt.middleware.attaching_function_token.attaching_function_token" href="attaching_function_token.html">slack_bolt.middleware.attaching_function_token.attaching_function_token</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+</dl>
+</section>
+<section>
+</section>
+<section>
+</section>
+<section>
+<h2 class="section-title" id="header-classes">Classes</h2>
+<dl>
+<dt id="slack_bolt.middleware.attaching_function_token.AttachingFunctionToken"><code class="flex name class">
+<span>class <span class="ident">AttachingFunctionToken</span></span>
+</code></dt>
+<dd>
+<div class="desc"><p>A middleware can process request data before other middleware and listener functions.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AttachingFunctionToken(Middleware):  # type: ignore
+    def process(
+        self,
+        *,
+        req: BoltRequest,
+        resp: BoltResponse,
+        # This method is not supposed to be invoked by bolt-python users
+        next: Callable[[], BoltResponse],
+    ) -&gt; BoltResponse:
+        if req.context.function_bot_access_token is not None:
+            req.context.client.token = req.context.function_bot_access_token
+
+        return next()</code></pre>
+</details>
+<h3>Ancestors</h3>
+<ul class="hlist">
+<li><a title="slack_bolt.middleware.middleware.Middleware" href="../middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></li>
+</ul>
+<h3>Inherited members</h3>
+<ul class="hlist">
+<li><code><b><a title="slack_bolt.middleware.middleware.Middleware" href="../middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></b></code>:
+<ul class="hlist">
+<li><code><a title="slack_bolt.middleware.middleware.Middleware.name" href="../middleware.html#slack_bolt.middleware.middleware.Middleware.name">name</a></code></li>
+<li><code><a title="slack_bolt.middleware.middleware.Middleware.process" href="../middleware.html#slack_bolt.middleware.middleware.Middleware.process">process</a></code></li>
+</ul>
+</li>
+</ul>
+</dd>
+</dl>
+</section>
+</article>
+<nav id="sidebar">
+<div class="toc">
+<ul></ul>
+</div>
+<ul id="index">
+<li><h3>Super-module</h3>
+<ul>
+<li><code><a title="slack_bolt.middleware" href="../index.html">slack_bolt.middleware</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-submodules">Sub-modules</a></h3>
+<ul>
+<li><code><a title="slack_bolt.middleware.attaching_function_token.async_attaching_function_token" href="async_attaching_function_token.html">slack_bolt.middleware.attaching_function_token.async_attaching_function_token</a></code></li>
+<li><code><a title="slack_bolt.middleware.attaching_function_token.attaching_function_token" href="attaching_function_token.html">slack_bolt.middleware.attaching_function_token.attaching_function_token</a></code></li>
+</ul>
+</li>
+<li><h3><a href="#header-classes">Classes</a></h3>
+<ul>
+<li>
+<h4><code><a title="slack_bolt.middleware.attaching_function_token.AttachingFunctionToken" href="#slack_bolt.middleware.attaching_function_token.AttachingFunctionToken">AttachingFunctionToken</a></code></h4>
+</li>
+</ul>
+</li>
+</ul>
+</nav>
+</main>
+<footer id="footer">
+<p>Generated by <a href="https://pdoc3.github.io/pdoc" title="pdoc: Python API documentation generator"><cite>pdoc</cite> 0.11.1</a>.</p>
+</footer>
+</body>
+</html>
diff --git a/docs/static/api-docs/slack_bolt/middleware/index.html b/docs/static/api-docs/slack_bolt/middleware/index.html
index 3171f1320..58ae3d02d 100644
--- a/docs/static/api-docs/slack_bolt/middleware/index.html
+++ b/docs/static/api-docs/slack_bolt/middleware/index.html
@@ -50,6 +50,10 @@ <h2 class="section-title" id="header-submodules">Sub-modules</h2>
 <dd>
 <div class="desc"></div>
 </dd>
+<dt><code class="name"><a title="slack_bolt.middleware.attaching_function_token" href="attaching_function_token/index.html">slack_bolt.middleware.attaching_function_token</a></code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
 <dt><code class="name"><a title="slack_bolt.middleware.authorization" href="authorization/index.html">slack_bolt.middleware.authorization</a></code></dt>
 <dd>
 <div class="desc"></div>
@@ -95,6 +99,43 @@ <h2 class="section-title" id="header-submodules">Sub-modules</h2>
 <section>
 <h2 class="section-title" id="header-classes">Classes</h2>
 <dl>
+<dt id="slack_bolt.middleware.AttachingFunctionToken"><code class="flex name class">
+<span>class <span class="ident">AttachingFunctionToken</span></span>
+</code></dt>
+<dd>
+<div class="desc"><p>A middleware can process request data before other middleware and listener functions.</p></div>
+<details class="source">
+<summary>
+<span>Expand source code</span>
+</summary>
+<pre><code class="python">class AttachingFunctionToken(Middleware):  # type: ignore
+    def process(
+        self,
+        *,
+        req: BoltRequest,
+        resp: BoltResponse,
+        # This method is not supposed to be invoked by bolt-python users
+        next: Callable[[], BoltResponse],
+    ) -&gt; BoltResponse:
+        if req.context.function_bot_access_token is not None:
+            req.context.client.token = req.context.function_bot_access_token
+
+        return next()</code></pre>
+</details>
+<h3>Ancestors</h3>
+<ul class="hlist">
+<li><a title="slack_bolt.middleware.middleware.Middleware" href="middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></li>
+</ul>
+<h3>Inherited members</h3>
+<ul class="hlist">
+<li><code><b><a title="slack_bolt.middleware.middleware.Middleware" href="middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></b></code>:
+<ul class="hlist">
+<li><code><a title="slack_bolt.middleware.middleware.Middleware.name" href="middleware.html#slack_bolt.middleware.middleware.Middleware.name">name</a></code></li>
+<li><code><a title="slack_bolt.middleware.middleware.Middleware.process" href="middleware.html#slack_bolt.middleware.middleware.Middleware.process">process</a></code></li>
+</ul>
+</li>
+</ul>
+</dd>
 <dt id="slack_bolt.middleware.CustomMiddleware"><code class="flex name class">
 <span>class <span class="ident">CustomMiddleware</span></span>
 <span>(</span><span>*, app_name: str, func: Callable, base_logger: Optional[logging.Logger] = None)</span>
@@ -318,6 +359,7 @@ <h3>Inherited members</h3>
 </details>
 <h3>Subclasses</h3>
 <ul class="hlist">
+<li><a title="slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken" href="attaching_function_token/attaching_function_token.html#slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken">AttachingFunctionToken</a></li>
 <li><a title="slack_bolt.middleware.authorization.authorization.Authorization" href="authorization/authorization.html#slack_bolt.middleware.authorization.authorization.Authorization">Authorization</a></li>
 <li><a title="slack_bolt.middleware.custom_middleware.CustomMiddleware" href="custom_middleware.html#slack_bolt.middleware.custom_middleware.CustomMiddleware">CustomMiddleware</a></li>
 <li><a title="slack_bolt.middleware.ignoring_self_events.ignoring_self_events.IgnoringSelfEvents" href="ignoring_self_events/ignoring_self_events.html#slack_bolt.middleware.ignoring_self_events.ignoring_self_events.IgnoringSelfEvents">IgnoringSelfEvents</a></li>
@@ -898,6 +940,7 @@ <h3>Inherited members</h3>
 <li><code><a title="slack_bolt.middleware.async_custom_middleware" href="async_custom_middleware.html">slack_bolt.middleware.async_custom_middleware</a></code></li>
 <li><code><a title="slack_bolt.middleware.async_middleware" href="async_middleware.html">slack_bolt.middleware.async_middleware</a></code></li>
 <li><code><a title="slack_bolt.middleware.async_middleware_error_handler" href="async_middleware_error_handler.html">slack_bolt.middleware.async_middleware_error_handler</a></code></li>
+<li><code><a title="slack_bolt.middleware.attaching_function_token" href="attaching_function_token/index.html">slack_bolt.middleware.attaching_function_token</a></code></li>
 <li><code><a title="slack_bolt.middleware.authorization" href="authorization/index.html">slack_bolt.middleware.authorization</a></code></li>
 <li><code><a title="slack_bolt.middleware.custom_middleware" href="custom_middleware.html">slack_bolt.middleware.custom_middleware</a></code></li>
 <li><code><a title="slack_bolt.middleware.ignoring_self_events" href="ignoring_self_events/index.html">slack_bolt.middleware.ignoring_self_events</a></code></li>
@@ -912,6 +955,9 @@ <h3>Inherited members</h3>
 <li><h3><a href="#header-classes">Classes</a></h3>
 <ul>
 <li>
+<h4><code><a title="slack_bolt.middleware.AttachingFunctionToken" href="#slack_bolt.middleware.AttachingFunctionToken">AttachingFunctionToken</a></code></h4>
+</li>
+<li>
 <h4><code><a title="slack_bolt.middleware.CustomMiddleware" href="#slack_bolt.middleware.CustomMiddleware">CustomMiddleware</a></code></h4>
 <ul class="">
 <li><code><a title="slack_bolt.middleware.CustomMiddleware.app_name" href="#slack_bolt.middleware.CustomMiddleware.app_name">app_name</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/middleware/middleware.html b/docs/static/api-docs/slack_bolt/middleware/middleware.html
index fda86bca6..687d23060 100644
--- a/docs/static/api-docs/slack_bolt/middleware/middleware.html
+++ b/docs/static/api-docs/slack_bolt/middleware/middleware.html
@@ -91,6 +91,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 </details>
 <h3>Subclasses</h3>
 <ul class="hlist">
+<li><a title="slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken" href="attaching_function_token/attaching_function_token.html#slack_bolt.middleware.attaching_function_token.attaching_function_token.AttachingFunctionToken">AttachingFunctionToken</a></li>
 <li><a title="slack_bolt.middleware.authorization.authorization.Authorization" href="authorization/authorization.html#slack_bolt.middleware.authorization.authorization.Authorization">Authorization</a></li>
 <li><a title="slack_bolt.middleware.custom_middleware.CustomMiddleware" href="custom_middleware.html#slack_bolt.middleware.custom_middleware.CustomMiddleware">CustomMiddleware</a></li>
 <li><a title="slack_bolt.middleware.ignoring_self_events.ignoring_self_events.IgnoringSelfEvents" href="ignoring_self_events/ignoring_self_events.html#slack_bolt.middleware.ignoring_self_events.ignoring_self_events.IgnoringSelfEvents">IgnoringSelfEvents</a></li>
diff --git a/docs/static/api-docs/slack_bolt/middleware/ssl_check/async_ssl_check.html b/docs/static/api-docs/slack_bolt/middleware/ssl_check/async_ssl_check.html
index 5a8e90b4d..0ce0a5188 100644
--- a/docs/static/api-docs/slack_bolt/middleware/ssl_check/async_ssl_check.html
+++ b/docs/static/api-docs/slack_bolt/middleware/ssl_check/async_ssl_check.html
@@ -79,17 +79,6 @@ <h3>Ancestors</h3>
 <li><a title="slack_bolt.middleware.middleware.Middleware" href="../middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a></li>
 <li><a title="slack_bolt.middleware.async_middleware.AsyncMiddleware" href="../async_middleware.html#slack_bolt.middleware.async_middleware.AsyncMiddleware">AsyncMiddleware</a></li>
 </ul>
-<h3>Class variables</h3>
-<dl>
-<dt id="slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck.logger"><code class="name">var <span class="ident">logger</span> : logging.Logger</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-<dt id="slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck.verification_token"><code class="name">var <span class="ident">verification_token</span> : Optional[str]</code></dt>
-<dd>
-<div class="desc"></div>
-</dd>
-</dl>
 <h3>Inherited members</h3>
 <ul class="hlist">
 <li><code><b><a title="slack_bolt.middleware.ssl_check.ssl_check.SslCheck" href="ssl_check.html#slack_bolt.middleware.ssl_check.ssl_check.SslCheck">SslCheck</a></b></code>:
@@ -122,10 +111,6 @@ <h3>Inherited members</h3>
 <ul>
 <li>
 <h4><code><a title="slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck" href="#slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck">AsyncSslCheck</a></code></h4>
-<ul class="">
-<li><code><a title="slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck.logger" href="#slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck.logger">logger</a></code></li>
-<li><code><a title="slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck.verification_token" href="#slack_bolt.middleware.ssl_check.async_ssl_check.AsyncSslCheck.verification_token">verification_token</a></code></li>
-</ul>
 </li>
 </ul>
 </li>
diff --git a/docs/static/api-docs/slack_bolt/request/internals.html b/docs/static/api-docs/slack_bolt/request/internals.html
index faf1be9bd..8bf932f87 100644
--- a/docs/static/api-docs/slack_bolt/request/internals.html
+++ b/docs/static/api-docs/slack_bolt/request/internals.html
@@ -93,6 +93,24 @@ <h2 class="section-title" id="header-functions">Functions</h2>
 <dd>
 <div class="desc"></div>
 </dd>
+<dt id="slack_bolt.request.internals.extract_function_bot_access_token"><code class="name flex">
+<span>def <span class="ident">extract_function_bot_access_token</span></span>(<span>payload: Dict[str, Any]) ‑> Optional[str]</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.request.internals.extract_function_execution_id"><code class="name flex">
+<span>def <span class="ident">extract_function_execution_id</span></span>(<span>payload: Dict[str, Any]) ‑> Optional[str]</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
+<dt id="slack_bolt.request.internals.extract_function_inputs"><code class="name flex">
+<span>def <span class="ident">extract_function_inputs</span></span>(<span>payload: Dict[str, Any]) ‑> Optional[Dict[str, Any]]</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
 <dt id="slack_bolt.request.internals.extract_is_enterprise_install"><code class="name flex">
 <span>def <span class="ident">extract_is_enterprise_install</span></span>(<span>payload: Dict[str, Any]) ‑> Optional[bool]</span>
 </code></dt>
@@ -150,6 +168,9 @@ <h2 class="section-title" id="header-functions">Functions</h2>
 <li><code><a title="slack_bolt.request.internals.extract_channel_id" href="#slack_bolt.request.internals.extract_channel_id">extract_channel_id</a></code></li>
 <li><code><a title="slack_bolt.request.internals.extract_content_type" href="#slack_bolt.request.internals.extract_content_type">extract_content_type</a></code></li>
 <li><code><a title="slack_bolt.request.internals.extract_enterprise_id" href="#slack_bolt.request.internals.extract_enterprise_id">extract_enterprise_id</a></code></li>
+<li><code><a title="slack_bolt.request.internals.extract_function_bot_access_token" href="#slack_bolt.request.internals.extract_function_bot_access_token">extract_function_bot_access_token</a></code></li>
+<li><code><a title="slack_bolt.request.internals.extract_function_execution_id" href="#slack_bolt.request.internals.extract_function_execution_id">extract_function_execution_id</a></code></li>
+<li><code><a title="slack_bolt.request.internals.extract_function_inputs" href="#slack_bolt.request.internals.extract_function_inputs">extract_function_inputs</a></code></li>
 <li><code><a title="slack_bolt.request.internals.extract_is_enterprise_install" href="#slack_bolt.request.internals.extract_is_enterprise_install">extract_is_enterprise_install</a></code></li>
 <li><code><a title="slack_bolt.request.internals.extract_team_id" href="#slack_bolt.request.internals.extract_team_id">extract_team_id</a></code></li>
 <li><code><a title="slack_bolt.request.internals.extract_user_id" href="#slack_bolt.request.internals.extract_user_id">extract_user_id</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/request/payload_utils.html b/docs/static/api-docs/slack_bolt/request/payload_utils.html
index d3c8d263f..3013c8927 100644
--- a/docs/static/api-docs/slack_bolt/request/payload_utils.html
+++ b/docs/static/api-docs/slack_bolt/request/payload_utils.html
@@ -81,6 +81,12 @@ <h2 class="section-title" id="header-functions">Functions</h2>
 <dd>
 <div class="desc"></div>
 </dd>
+<dt id="slack_bolt.request.payload_utils.is_function"><code class="name flex">
+<span>def <span class="ident">is_function</span></span>(<span>body: Dict[str, Any]) ‑> bool</span>
+</code></dt>
+<dd>
+<div class="desc"></div>
+</dd>
 <dt id="slack_bolt.request.payload_utils.is_global_shortcut"><code class="name flex">
 <span>def <span class="ident">is_global_shortcut</span></span>(<span>body: Dict[str, Any]) ‑> bool</span>
 </code></dt>
@@ -220,6 +226,7 @@ <h2 class="section-title" id="header-functions">Functions</h2>
 <li><code><a title="slack_bolt.request.payload_utils.is_dialog_submission" href="#slack_bolt.request.payload_utils.is_dialog_submission">is_dialog_submission</a></code></li>
 <li><code><a title="slack_bolt.request.payload_utils.is_dialog_suggestion" href="#slack_bolt.request.payload_utils.is_dialog_suggestion">is_dialog_suggestion</a></code></li>
 <li><code><a title="slack_bolt.request.payload_utils.is_event" href="#slack_bolt.request.payload_utils.is_event">is_event</a></code></li>
+<li><code><a title="slack_bolt.request.payload_utils.is_function" href="#slack_bolt.request.payload_utils.is_function">is_function</a></code></li>
 <li><code><a title="slack_bolt.request.payload_utils.is_global_shortcut" href="#slack_bolt.request.payload_utils.is_global_shortcut">is_global_shortcut</a></code></li>
 <li><code><a title="slack_bolt.request.payload_utils.is_message_shortcut" href="#slack_bolt.request.payload_utils.is_message_shortcut">is_message_shortcut</a></code></li>
 <li><code><a title="slack_bolt.request.payload_utils.is_options" href="#slack_bolt.request.payload_utils.is_options">is_options</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/workflows/index.html b/docs/static/api-docs/slack_bolt/workflows/index.html
index 677bafdb7..90af47ae1 100644
--- a/docs/static/api-docs/slack_bolt/workflows/index.html
+++ b/docs/static/api-docs/slack_bolt/workflows/index.html
@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
 <meta name="generator" content="pdoc3 0.11.1">
 <title>slack_bolt.workflows API documentation</title>
-<meta name="description" content="Workflow Steps from Apps enables developers to build their own custom workflow steps …">
+<meta name="description" content="Steps from apps enables developers to build their own steps …">
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
@@ -25,7 +25,7 @@
 <h1 class="title">Module <code>slack_bolt.workflows</code></h1>
 </header>
 <section id="section-intro">
-<p>Workflow Steps from Apps enables developers to build their own custom workflow steps.</p>
+<p>Steps from apps enables developers to build their own steps.</p>
 <p>Check the following API documents first:</p>
 <ul>
 <li><code><a title="slack_bolt.workflows.step.step" href="step/step.html">slack_bolt.workflows.step.step</a></code></li>
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/async_step.html b/docs/static/api-docs/slack_bolt/workflows/step/async_step.html
index 18d6aa1a8..090cbddb3 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/async_step.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/async_step.html
@@ -41,12 +41,12 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The callback_id for this workflow step</dd>
+<dd>The callback_id for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>Either a single function or a list of functions for opening a modal in the builder UI
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
@@ -54,7 +54,7 @@ <h2 id="args">Args</h2>
 <dd>Either a single function or a list of functions for handling modal interactions in the builder UI
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
 <dt><strong><code>execute</code></strong></dt>
-<dd>Either a single function or a list of functions for handling workflow step executions
+<dd>Either a single function or a list of functions for handling steps from apps executions
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
 <dt><strong><code>app_name</code></strong></dt>
 <dd>The app name that can be mainly used for logging</dd>
@@ -67,13 +67,13 @@ <h2 id="args">Args</h2>
 </summary>
 <pre><code class="python">class AsyncWorkflowStep:
     callback_id: Union[str, Pattern]
-    &#34;&#34;&#34;The Callback ID of the workflow step&#34;&#34;&#34;
+    &#34;&#34;&#34;The Callback ID of the step from app&#34;&#34;&#34;
     edit: AsyncListener
     &#34;&#34;&#34;`edit` listener, which displays a modal in Workflow Builder&#34;&#34;&#34;
     save: AsyncListener
     &#34;&#34;&#34;`save` listener, which accepts workflow creator&#39;s data submission in Workflow Builder&#34;&#34;&#34;
     execute: AsyncListener
-    &#34;&#34;&#34;`execute` listener, which processes workflow step execution&#34;&#34;&#34;
+    &#34;&#34;&#34;`execute` listener, which processes the step from app execution&#34;&#34;&#34;
 
     def __init__(
         self,
@@ -87,16 +87,16 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Args:
-            callback_id: The callback_id for this workflow step
+            callback_id: The callback_id for this step from app
             edit: Either a single function or a list of functions for opening a modal in the builder UI
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
             save: Either a single function or a list of functions for handling modal interactions in the builder UI
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
-            execute: Either a single function or a list of functions for handling workflow step executions
+            execute: Either a single function or a list of functions for handling steps from apps executions
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
             app_name: The app name that can be mainly used for logging
             base_logger: The logger instance that can be used as a template when creating this step&#39;s logger
@@ -133,7 +133,7 @@ <h2 id="args">Args</h2>
     ) -&gt; AsyncWorkflowStepBuilder:
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
         &#34;&#34;&#34;
         return AsyncWorkflowStepBuilder(callback_id, base_logger=base_logger)
@@ -212,7 +212,7 @@ <h3>Class variables</h3>
 <dl>
 <dt id="slack_bolt.workflows.step.async_step.AsyncWorkflowStep.callback_id"><code class="name">var <span class="ident">callback_id</span> : Union[str, Pattern]</code></dt>
 <dd>
-<div class="desc"><p>The Callback ID of the workflow step</p></div>
+<div class="desc"><p>The Callback ID of the step from app</p></div>
 </dd>
 <dt id="slack_bolt.workflows.step.async_step.AsyncWorkflowStep.edit"><code class="name">var <span class="ident">edit</span> : <a title="slack_bolt.listener.async_listener.AsyncListener" href="../../listener/async_listener.html#slack_bolt.listener.async_listener.AsyncListener">AsyncListener</a></code></dt>
 <dd>
@@ -220,7 +220,7 @@ <h3>Class variables</h3>
 </dd>
 <dt id="slack_bolt.workflows.step.async_step.AsyncWorkflowStep.execute"><code class="name">var <span class="ident">execute</span> : <a title="slack_bolt.listener.async_listener.AsyncListener" href="../../listener/async_listener.html#slack_bolt.listener.async_listener.AsyncListener">AsyncListener</a></code></dt>
 <dd>
-<div class="desc"><p><code>execute</code> listener, which processes workflow step execution</p></div>
+<div class="desc"><p><code>execute</code> listener, which processes the step from app execution</p></div>
 </dd>
 <dt id="slack_bolt.workflows.step.async_step.AsyncWorkflowStep.save"><code class="name">var <span class="ident">save</span> : <a title="slack_bolt.listener.async_listener.AsyncListener" href="../../listener/async_listener.html#slack_bolt.listener.async_listener.AsyncListener">AsyncListener</a></code></dt>
 <dd>
@@ -240,7 +240,7 @@ <h3>Static methods</h3>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p></div>
 </dd>
 </dl>
@@ -250,10 +250,10 @@ <h3>Static methods</h3>
 <span>(</span><span>callback_id: Union[str, Pattern], app_name: Optional[str] = None, base_logger: Optional[logging.Logger] = None)</span>
 </code></dt>
 <dd>
-<div class="desc"><p>Steps from Apps
+<div class="desc"><p>Steps from apps
 Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details.</p>
 <h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>This builder is supposed to be used as decorator.</p>
 <pre><code>my_step = AsyncWorkflowStep.builder("my_step")
@@ -285,7 +285,7 @@ <h2 id="args">Args</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class AsyncWorkflowStepBuilder:
-    &#34;&#34;&#34;Steps from Apps
+    &#34;&#34;&#34;Steps from apps
     Refer to https://api.slack.com/workflows/steps for details.
     &#34;&#34;&#34;
 
@@ -303,7 +303,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         This builder is supposed to be used as decorator.
@@ -345,7 +345,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Registers a new edit listener with details.
@@ -398,7 +398,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Registers a new save listener with details.
@@ -451,7 +451,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Registers a new execute listener with details.
@@ -498,7 +498,7 @@ <h2 id="args">Args</h2>
     def build(self, base_logger: Optional[Logger] = None) -&gt; &#34;AsyncWorkflowStep&#34;:
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Constructs a WorkflowStep object. This method may raise an exception
@@ -602,7 +602,7 @@ <h3>Methods</h3>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Constructs a WorkflowStep object. This method may raise an exception
 if the builder doesn't have enough configurations to build the object.</p>
@@ -614,7 +614,7 @@ <h2 id="returns">Returns</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Registers a new edit listener with details.</p>
 <p>You can use this method as decorator as well.</p>
@@ -647,7 +647,7 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Registers a new execute listener with details.</p>
 <p>You can use this method as decorator as well.</p>
@@ -680,7 +680,7 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Registers a new save listener with details.</p>
 <p>You can use this method as decorator as well.</p>
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/async_step_middleware.html b/docs/static/api-docs/slack_bolt/workflows/step/async_step_middleware.html
index 68e680ac6..d5753e794 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/async_step_middleware.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/async_step_middleware.html
@@ -40,13 +40,13 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>step: <a title="slack_bolt.workflows.step.async_step.AsyncWorkflowStep" href="async_step.html#slack_bolt.workflows.step.async_step.AsyncWorkflowStep">AsyncWorkflowStep</a>, listener_runner: <a title="slack_bolt.listener.asyncio_runner.AsyncioListenerRunner" href="../../listener/asyncio_runner.html#slack_bolt.listener.asyncio_runner.AsyncioListenerRunner">AsyncioListenerRunner</a>)</span>
 </code></dt>
 <dd>
-<div class="desc"><p>Base middleware for workflow step specific ones</p></div>
+<div class="desc"><p>Base middleware for step from app specific ones</p></div>
 <details class="source">
 <summary>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class AsyncWorkflowStepMiddleware(AsyncMiddleware):  # type:ignore
-    &#34;&#34;&#34;Base middleware for workflow step specific ones&#34;&#34;&#34;
+    &#34;&#34;&#34;Base middleware for step from app specific ones&#34;&#34;&#34;
 
     def __init__(self, step: AsyncWorkflowStep, listener_runner: AsyncioListenerRunner):
         self.step = step
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/index.html b/docs/static/api-docs/slack_bolt/workflows/step/index.html
index bb2e3cfaf..1bde24cdc 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/index.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/index.html
@@ -51,7 +51,7 @@ <h2 class="section-title" id="header-submodules">Sub-modules</h2>
 </dd>
 <dt><code class="name"><a title="slack_bolt.workflows.step.utilities" href="utilities/index.html">slack_bolt.workflows.step.utilities</a></code></dt>
 <dd>
-<div class="desc"><p>Utilities specific to workflow steps from apps …</p></div>
+<div class="desc"><p>Utilities specific to steps from apps …</p></div>
 </dd>
 </dl>
 </section>
@@ -67,7 +67,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>*, client: slack_sdk.web.client.WebClient, body: dict)</span>
 </code></dt>
 <dd>
-<div class="desc"><p><code>complete()</code> utility to tell Slack the completion of a workflow step execution.</p>
+<div class="desc"><p><code>complete()</code> utility to tell Slack the completion of a step from app execution.</p>
 <pre><code>def execute(step, complete, fail):
     inputs = step["inputs"]
     # if everything was successful
@@ -92,7 +92,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class Complete:
-    &#34;&#34;&#34;`complete()` utility to tell Slack the completion of a workflow step execution.
+    &#34;&#34;&#34;`complete()` utility to tell Slack the completion of a step from app execution.
 
         def execute(step, complete, fail):
             inputs = step[&#34;inputs&#34;]
@@ -215,7 +215,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>*, client: slack_sdk.web.client.WebClient, body: dict)</span>
 </code></dt>
 <dd>
-<div class="desc"><p><code>fail()</code> utility to tell Slack the execution failure of a workflow step.</p>
+<div class="desc"><p><code>fail()</code> utility to tell Slack the execution failure of a step from app.</p>
 <pre><code>def execute(step, complete, fail):
     inputs = step["inputs"]
     # if something went wrong
@@ -237,7 +237,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class Fail:
-    &#34;&#34;&#34;`fail()` utility to tell Slack the execution failure of a workflow step.
+    &#34;&#34;&#34;`fail()` utility to tell Slack the execution failure of a step from app.
 
         def execute(step, complete, fail):
             inputs = step[&#34;inputs&#34;]
@@ -374,12 +374,12 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The callback_id for this workflow step</dd>
+<dd>The callback_id for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>Either a single function or a list of functions for opening a modal in the builder UI
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
@@ -387,7 +387,7 @@ <h2 id="args">Args</h2>
 <dd>Either a single function or a list of functions for handling modal interactions in the builder UI
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
 <dt><strong><code>execute</code></strong></dt>
-<dd>Either a single function or a list of functions for handling workflow step executions
+<dd>Either a single function or a list of functions for handling step from app executions
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
 <dt><strong><code>app_name</code></strong></dt>
 <dd>The app name that can be mainly used for logging</dd>
@@ -400,13 +400,13 @@ <h2 id="args">Args</h2>
 </summary>
 <pre><code class="python">class WorkflowStep:
     callback_id: Union[str, Pattern]
-    &#34;&#34;&#34;The Callback ID of the workflow step&#34;&#34;&#34;
+    &#34;&#34;&#34;The Callback ID of the step from app&#34;&#34;&#34;
     edit: Listener
     &#34;&#34;&#34;`edit` listener, which displays a modal in Workflow Builder&#34;&#34;&#34;
     save: Listener
     &#34;&#34;&#34;`save` listener, which accepts workflow creator&#39;s data submission in Workflow Builder&#34;&#34;&#34;
     execute: Listener
-    &#34;&#34;&#34;`execute` listener, which processes workflow step execution&#34;&#34;&#34;
+    &#34;&#34;&#34;`execute` listener, which processes step from app execution&#34;&#34;&#34;
 
     def __init__(
         self,
@@ -420,16 +420,16 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Args:
-            callback_id: The callback_id for this workflow step
+            callback_id: The callback_id for this step from app
             edit: Either a single function or a list of functions for opening a modal in the builder UI
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
             save: Either a single function or a list of functions for handling modal interactions in the builder UI
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
-            execute: Either a single function or a list of functions for handling workflow step executions
+            execute: Either a single function or a list of functions for handling step from app executions
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
             app_name: The app name that can be mainly used for logging
             base_logger: The logger instance that can be used as a template when creating this step&#39;s logger
@@ -462,7 +462,7 @@ <h2 id="args">Args</h2>
     def builder(cls, callback_id: Union[str, Pattern], base_logger: Optional[Logger] = None) -&gt; WorkflowStepBuilder:
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
         &#34;&#34;&#34;
         return WorkflowStepBuilder(
@@ -558,7 +558,7 @@ <h3>Class variables</h3>
 <dl>
 <dt id="slack_bolt.workflows.step.WorkflowStep.callback_id"><code class="name">var <span class="ident">callback_id</span> : Union[str, Pattern]</code></dt>
 <dd>
-<div class="desc"><p>The Callback ID of the workflow step</p></div>
+<div class="desc"><p>The Callback ID of the step from app</p></div>
 </dd>
 <dt id="slack_bolt.workflows.step.WorkflowStep.edit"><code class="name">var <span class="ident">edit</span> : <a title="slack_bolt.listener.listener.Listener" href="../../listener/listener.html#slack_bolt.listener.listener.Listener">Listener</a></code></dt>
 <dd>
@@ -566,7 +566,7 @@ <h3>Class variables</h3>
 </dd>
 <dt id="slack_bolt.workflows.step.WorkflowStep.execute"><code class="name">var <span class="ident">execute</span> : <a title="slack_bolt.listener.listener.Listener" href="../../listener/listener.html#slack_bolt.listener.listener.Listener">Listener</a></code></dt>
 <dd>
-<div class="desc"><p><code>execute</code> listener, which processes workflow step execution</p></div>
+<div class="desc"><p><code>execute</code> listener, which processes step from app execution</p></div>
 </dd>
 <dt id="slack_bolt.workflows.step.WorkflowStep.save"><code class="name">var <span class="ident">save</span> : <a title="slack_bolt.listener.listener.Listener" href="../../listener/listener.html#slack_bolt.listener.listener.Listener">Listener</a></code></dt>
 <dd>
@@ -586,7 +586,7 @@ <h3>Static methods</h3>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p></div>
 </dd>
 </dl>
@@ -596,13 +596,13 @@ <h3>Static methods</h3>
 <span>(</span><span>step: <a title="slack_bolt.workflows.step.step.WorkflowStep" href="step.html#slack_bolt.workflows.step.step.WorkflowStep">WorkflowStep</a>, listener_runner: <a title="slack_bolt.listener.thread_runner.ThreadListenerRunner" href="../../listener/thread_runner.html#slack_bolt.listener.thread_runner.ThreadListenerRunner">ThreadListenerRunner</a>)</span>
 </code></dt>
 <dd>
-<div class="desc"><p>Base middleware for workflow step specific ones</p></div>
+<div class="desc"><p>Base middleware for step from app specific ones</p></div>
 <details class="source">
 <summary>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class WorkflowStepMiddleware(Middleware):  # type:ignore
-    &#34;&#34;&#34;Base middleware for workflow step specific ones&#34;&#34;&#34;
+    &#34;&#34;&#34;Base middleware for step from app specific ones&#34;&#34;&#34;
 
     def __init__(self, step: WorkflowStep, listener_runner: ThreadListenerRunner):
         self.step = step
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/step.html b/docs/static/api-docs/slack_bolt/workflows/step/step.html
index 0f77c9e4e..90d742b3d 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/step.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/step.html
@@ -41,12 +41,12 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <h2 id="args">Args</h2>
 <dl>
 <dt><strong><code>callback_id</code></strong></dt>
-<dd>The callback_id for this workflow step</dd>
+<dd>The callback_id for this step from app</dd>
 <dt><strong><code>edit</code></strong></dt>
 <dd>Either a single function or a list of functions for opening a modal in the builder UI
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
@@ -54,7 +54,7 @@ <h2 id="args">Args</h2>
 <dd>Either a single function or a list of functions for handling modal interactions in the builder UI
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
 <dt><strong><code>execute</code></strong></dt>
-<dd>Either a single function or a list of functions for handling workflow step executions
+<dd>Either a single function or a list of functions for handling step from app executions
 When it's a list, the first one is responsible for ack() while the rest are lazy listeners.</dd>
 <dt><strong><code>app_name</code></strong></dt>
 <dd>The app name that can be mainly used for logging</dd>
@@ -67,13 +67,13 @@ <h2 id="args">Args</h2>
 </summary>
 <pre><code class="python">class WorkflowStep:
     callback_id: Union[str, Pattern]
-    &#34;&#34;&#34;The Callback ID of the workflow step&#34;&#34;&#34;
+    &#34;&#34;&#34;The Callback ID of the step from app&#34;&#34;&#34;
     edit: Listener
     &#34;&#34;&#34;`edit` listener, which displays a modal in Workflow Builder&#34;&#34;&#34;
     save: Listener
     &#34;&#34;&#34;`save` listener, which accepts workflow creator&#39;s data submission in Workflow Builder&#34;&#34;&#34;
     execute: Listener
-    &#34;&#34;&#34;`execute` listener, which processes workflow step execution&#34;&#34;&#34;
+    &#34;&#34;&#34;`execute` listener, which processes step from app execution&#34;&#34;&#34;
 
     def __init__(
         self,
@@ -87,16 +87,16 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Args:
-            callback_id: The callback_id for this workflow step
+            callback_id: The callback_id for this step from app
             edit: Either a single function or a list of functions for opening a modal in the builder UI
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
             save: Either a single function or a list of functions for handling modal interactions in the builder UI
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
-            execute: Either a single function or a list of functions for handling workflow step executions
+            execute: Either a single function or a list of functions for handling step from app executions
                 When it&#39;s a list, the first one is responsible for ack() while the rest are lazy listeners.
             app_name: The app name that can be mainly used for logging
             base_logger: The logger instance that can be used as a template when creating this step&#39;s logger
@@ -129,7 +129,7 @@ <h2 id="args">Args</h2>
     def builder(cls, callback_id: Union[str, Pattern], base_logger: Optional[Logger] = None) -&gt; WorkflowStepBuilder:
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
         &#34;&#34;&#34;
         return WorkflowStepBuilder(
@@ -225,7 +225,7 @@ <h3>Class variables</h3>
 <dl>
 <dt id="slack_bolt.workflows.step.step.WorkflowStep.callback_id"><code class="name">var <span class="ident">callback_id</span> : Union[str, Pattern]</code></dt>
 <dd>
-<div class="desc"><p>The Callback ID of the workflow step</p></div>
+<div class="desc"><p>The Callback ID of the step from app</p></div>
 </dd>
 <dt id="slack_bolt.workflows.step.step.WorkflowStep.edit"><code class="name">var <span class="ident">edit</span> : <a title="slack_bolt.listener.listener.Listener" href="../../listener/listener.html#slack_bolt.listener.listener.Listener">Listener</a></code></dt>
 <dd>
@@ -233,7 +233,7 @@ <h3>Class variables</h3>
 </dd>
 <dt id="slack_bolt.workflows.step.step.WorkflowStep.execute"><code class="name">var <span class="ident">execute</span> : <a title="slack_bolt.listener.listener.Listener" href="../../listener/listener.html#slack_bolt.listener.listener.Listener">Listener</a></code></dt>
 <dd>
-<div class="desc"><p><code>execute</code> listener, which processes workflow step execution</p></div>
+<div class="desc"><p><code>execute</code> listener, which processes step from app execution</p></div>
 </dd>
 <dt id="slack_bolt.workflows.step.step.WorkflowStep.save"><code class="name">var <span class="ident">save</span> : <a title="slack_bolt.listener.listener.Listener" href="../../listener/listener.html#slack_bolt.listener.listener.Listener">Listener</a></code></dt>
 <dd>
@@ -253,7 +253,7 @@ <h3>Static methods</h3>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p></div>
 </dd>
 </dl>
@@ -263,10 +263,10 @@ <h3>Static methods</h3>
 <span>(</span><span>callback_id: Union[str, Pattern], app_name: Optional[str] = None, base_logger: Optional[logging.Logger] = None)</span>
 </code></dt>
 <dd>
-<div class="desc"><p>Steps from Apps
+<div class="desc"><p>Steps from apps
 Refer to <a href="https://api.slack.com/workflows/steps">https://api.slack.com/workflows/steps</a> for details.</p>
 <h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>This builder is supposed to be used as decorator.</p>
 <pre><code>my_step = WorkflowStep.builder("my_step")
@@ -298,7 +298,7 @@ <h2 id="args">Args</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class WorkflowStepBuilder:
-    &#34;&#34;&#34;Steps from Apps
+    &#34;&#34;&#34;Steps from apps
     Refer to https://api.slack.com/workflows/steps for details.
     &#34;&#34;&#34;
 
@@ -316,7 +316,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         This builder is supposed to be used as decorator.
@@ -358,7 +358,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Registers a new edit listener with details.
@@ -412,7 +412,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Registers a new save listener with details.
@@ -465,7 +465,7 @@ <h2 id="args">Args</h2>
     ):
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Registers a new execute listener with details.
@@ -512,7 +512,7 @@ <h2 id="args">Args</h2>
     def build(self, base_logger: Optional[Logger] = None) -&gt; &#34;WorkflowStep&#34;:
         &#34;&#34;&#34;
         Deprecated:
-            Steps from Apps for legacy workflows are now deprecated.
+            Steps from apps for legacy workflows are now deprecated.
             Use new custom steps: https://api.slack.com/automation/functions/custom-bolt
 
         Constructs a WorkflowStep object. This method may raise an exception
@@ -631,7 +631,7 @@ <h3>Methods</h3>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Constructs a WorkflowStep object. This method may raise an exception
 if the builder doesn't have enough configurations to build the object.</p>
@@ -643,7 +643,7 @@ <h2 id="returns">Returns</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Registers a new edit listener with details.</p>
 <p>You can use this method as decorator as well.</p>
@@ -676,7 +676,7 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Registers a new execute listener with details.</p>
 <p>You can use this method as decorator as well.</p>
@@ -709,7 +709,7 @@ <h2 id="args">Args</h2>
 </code></dt>
 <dd>
 <div class="desc"><h2 id="deprecated">Deprecated</h2>
-<p>Steps from Apps for legacy workflows are now deprecated.
+<p>Steps from apps for legacy workflows are now deprecated.
 Use new custom steps: <a href="https://api.slack.com/automation/functions/custom-bolt">https://api.slack.com/automation/functions/custom-bolt</a></p>
 <p>Registers a new save listener with details.</p>
 <p>You can use this method as decorator as well.</p>
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/step_middleware.html b/docs/static/api-docs/slack_bolt/workflows/step/step_middleware.html
index a91b6f491..5131b2a3f 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/step_middleware.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/step_middleware.html
@@ -40,13 +40,13 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>step: <a title="slack_bolt.workflows.step.step.WorkflowStep" href="step.html#slack_bolt.workflows.step.step.WorkflowStep">WorkflowStep</a>, listener_runner: <a title="slack_bolt.listener.thread_runner.ThreadListenerRunner" href="../../listener/thread_runner.html#slack_bolt.listener.thread_runner.ThreadListenerRunner">ThreadListenerRunner</a>)</span>
 </code></dt>
 <dd>
-<div class="desc"><p>Base middleware for workflow step specific ones</p></div>
+<div class="desc"><p>Base middleware for step from app specific ones</p></div>
 <details class="source">
 <summary>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class WorkflowStepMiddleware(Middleware):  # type:ignore
-    &#34;&#34;&#34;Base middleware for workflow step specific ones&#34;&#34;&#34;
+    &#34;&#34;&#34;Base middleware for step from app specific ones&#34;&#34;&#34;
 
     def __init__(self, step: WorkflowStep, listener_runner: ThreadListenerRunner):
         self.step = step
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_complete.html b/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_complete.html
index f18a48218..6c9c07332 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_complete.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_complete.html
@@ -40,7 +40,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>*, client: slack_sdk.web.async_client.AsyncWebClient, body: dict)</span>
 </code></dt>
 <dd>
-<div class="desc"><p><code>complete()</code> utility to tell Slack the completion of a workflow step execution.</p>
+<div class="desc"><p><code>complete()</code> utility to tell Slack the completion of a step from app execution.</p>
 <pre><code>async def execute(step, complete, fail):
     inputs = step["inputs"]
     # if everything was successful
@@ -65,7 +65,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class AsyncComplete:
-    &#34;&#34;&#34;`complete()` utility to tell Slack the completion of a workflow step execution.
+    &#34;&#34;&#34;`complete()` utility to tell Slack the completion of a step from app execution.
 
         async def execute(step, complete, fail):
             inputs = step[&#34;inputs&#34;]
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_fail.html b/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_fail.html
index 134c5e5b7..078cfd9e4 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_fail.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/utilities/async_fail.html
@@ -40,7 +40,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>*, client: slack_sdk.web.async_client.AsyncWebClient, body: dict)</span>
 </code></dt>
 <dd>
-<div class="desc"><p><code>fail()</code> utility to tell Slack the execution failure of a workflow step.</p>
+<div class="desc"><p><code>fail()</code> utility to tell Slack the execution failure of a step from app.</p>
 <pre><code>async def execute(step, complete, fail):
     inputs = step["inputs"]
     # if something went wrong
@@ -62,7 +62,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class AsyncFail:
-    &#34;&#34;&#34;`fail()` utility to tell Slack the execution failure of a workflow step.
+    &#34;&#34;&#34;`fail()` utility to tell Slack the execution failure of a step from app.
 
         async def execute(step, complete, fail):
             inputs = step[&#34;inputs&#34;]
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/utilities/complete.html b/docs/static/api-docs/slack_bolt/workflows/step/utilities/complete.html
index cd689bcac..66c844372 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/utilities/complete.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/utilities/complete.html
@@ -40,7 +40,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>*, client: slack_sdk.web.client.WebClient, body: dict)</span>
 </code></dt>
 <dd>
-<div class="desc"><p><code>complete()</code> utility to tell Slack the completion of a workflow step execution.</p>
+<div class="desc"><p><code>complete()</code> utility to tell Slack the completion of a step from app execution.</p>
 <pre><code>def execute(step, complete, fail):
     inputs = step["inputs"]
     # if everything was successful
@@ -65,7 +65,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class Complete:
-    &#34;&#34;&#34;`complete()` utility to tell Slack the completion of a workflow step execution.
+    &#34;&#34;&#34;`complete()` utility to tell Slack the completion of a step from app execution.
 
         def execute(step, complete, fail):
             inputs = step[&#34;inputs&#34;]
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/utilities/fail.html b/docs/static/api-docs/slack_bolt/workflows/step/utilities/fail.html
index 4f72751fa..703b565d7 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/utilities/fail.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/utilities/fail.html
@@ -40,7 +40,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>(</span><span>*, client: slack_sdk.web.client.WebClient, body: dict)</span>
 </code></dt>
 <dd>
-<div class="desc"><p><code>fail()</code> utility to tell Slack the execution failure of a workflow step.</p>
+<div class="desc"><p><code>fail()</code> utility to tell Slack the execution failure of a step from app.</p>
 <pre><code>def execute(step, complete, fail):
     inputs = step["inputs"]
     # if something went wrong
@@ -62,7 +62,7 @@ <h2 class="section-title" id="header-classes">Classes</h2>
 <span>Expand source code</span>
 </summary>
 <pre><code class="python">class Fail:
-    &#34;&#34;&#34;`fail()` utility to tell Slack the execution failure of a workflow step.
+    &#34;&#34;&#34;`fail()` utility to tell Slack the execution failure of a step from app.
 
         def execute(step, complete, fail):
             inputs = step[&#34;inputs&#34;]
diff --git a/docs/static/api-docs/slack_bolt/workflows/step/utilities/index.html b/docs/static/api-docs/slack_bolt/workflows/step/utilities/index.html
index e9a0f0f1e..f610b0b6d 100644
--- a/docs/static/api-docs/slack_bolt/workflows/step/utilities/index.html
+++ b/docs/static/api-docs/slack_bolt/workflows/step/utilities/index.html
@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
 <meta name="generator" content="pdoc3 0.11.1">
 <title>slack_bolt.workflows.step.utilities API documentation</title>
-<meta name="description" content="Utilities specific to workflow steps from apps …">
+<meta name="description" content="Utilities specific to steps from apps …">
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/sanitize.min.css" integrity="sha512-y1dtMcuvtTMJc1yPgEqF0ZjQbhnc/bFhyvIyVNb9Zk5mIGtqVaAB1Ttl28su8AvFMOY0EwRbAe+HCLqj6W7/KA==" crossorigin>
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/10up-sanitize.css/13.0.0/typography.min.css" integrity="sha512-Y1DYSb995BAfxobCkKepB1BqJJTPrOp3zPL74AWFugHHmmdcvO+C48WLrUOlhGMc0QG7AE3f7gmvvcrmX2fDoA==" crossorigin>
 <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css" crossorigin>
@@ -25,8 +25,8 @@
 <h1 class="title">Module <code>slack_bolt.workflows.step.utilities</code></h1>
 </header>
 <section id="section-intro">
-<p>Utilities specific to workflow steps from apps.</p>
-<p>In workflow step listeners, you can use a few specific listener/middleware arguments.</p>
+<p>Utilities specific to steps from apps.</p>
+<p>In steps from apps listeners, you can use a few specific listener/middleware arguments.</p>
 <h3 id="edit-listener"><code>edit</code> listener</h3>
 <ul>
 <li><code><a title="slack_bolt.workflows.step.utilities.configure" href="configure.html">slack_bolt.workflows.step.utilities.configure</a></code> for building a modal view</li>
diff --git a/slack_bolt/version.py b/slack_bolt/version.py
index 53bb26db2..c4d73f517 100644
--- a/slack_bolt/version.py
+++ b/slack_bolt/version.py
@@ -1,3 +1,3 @@
 """Check the latest version at https://pypi.org/project/slack-bolt/"""
 
-__version__ = "1.19.1"
+__version__ = "1.20.0"