Add AI/MCP Client example

[MehakBindra]

This pull request introduces a new sample Teams bot, ExtAIBot, that demonstrates the integration of Microsoft.Extensions.AI with Azure OpenAI and the Model Context Protocol (MCP) for advanced conversational capabilities. The main changes include the implementation of the bot’s core logic, support for streaming responses, per-conversation memory, local and remote tool invocation, and feedback handling. Additionally, supporting infrastructure and documentation are provided.

Key new features and infrastructure:

ExtAIBot Sample Implementation

• Added the complete ExtAIBot sample including core files: Agent.cs (conversation logic with streaming, memory, and tool invocation), LocalTools.cs (local AI tool definitions), McpTools.cs (MCP client and tool wrapping for citations), and CitationCollector.cs (parsing and accumulating citations for Teams messages).
• Implemented Program.cs to wire up the Teams bot, register message and feedback handlers, and delegate AI execution to the Agent.

Feedback Handling Support

• Added support for Teams feedback via new invoke names and value types, including message/fetchTask and associated data classes in the Teams SDK.
• Implemented feedback collection and UI in the sample bot, including Adaptive Card generation for feedback and console logging of user input.

Configuration and Documentation

• Added appsettings.json and updated the project file to include all necessary dependencies and references for running the sample.
• Provided a comprehensive README.md with setup instructions, architecture diagrams, and example interactions to help users understand and run the sample.

[Copilot]

Pull request overview

Adds a new ExtAIBot sample demonstrating Microsoft.Extensions.AI + Azure OpenAI + MCP tools, and extends the Teams SDK surface to support richer final streamed messages (feedback modes + suggested actions) and Teams feedback-related invoke routing.

Changes:

• Added core/samples/ExtAIBot sample (agent orchestration, MCP tool wiring, local tools, citation extraction, feedback UI).
• Enhanced streaming finalization to support explicit feedback modes, suggested actions, and attachment-only final messages.
• Added SDK support for message/fetchTask invokes and a typed message/submitAction “feedback” route, plus new channelData schema for feedbackLoop.

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
core/src/Microsoft.Teams.Apps/TeamsStreamingWriter.cs	Extends FinalizeResponseAsync and final-activity building to support feedback mode/suggested actions/text override.
core/src/Microsoft.Teams.Apps/Schema/TeamsChannelData.cs	Adds channelData.feedbackLoop schema + parsing and FeedbackType constants.
core/src/Microsoft.Teams.Apps/Schema/TeamsAttachmentBuilder.cs	Adds a new using (currently unused).
core/src/Microsoft.Teams.Apps/Schema/SuggestedAction.cs	Extends ctor to allow explicit value (defaults to title).
core/src/Microsoft.Teams.Apps/Schema/Entities/CitationEntity.cs	Adds AddFeedback(string mode) overload for feedbackLoop.
core/src/Microsoft.Teams.Apps/Handlers/MessageSubmitActionHandler.Value.cs	Adds typed payload model for submit-feedback value.
core/src/Microsoft.Teams.Apps/Handlers/MessageSubmitActionHandler.cs	Adds OnMessageSubmitFeedback route helper.
core/src/Microsoft.Teams.Apps/Handlers/MessageFetchTaskHandler.Value.cs	Adds typed payload model for message/fetchTask.
core/src/Microsoft.Teams.Apps/Handlers/MessageFetchTaskHandler.cs	Adds OnMessageFetchTask route helper returning task module invoke responses.
core/src/Microsoft.Teams.Apps/Handlers/InvokeHandler.Activity.cs	Adds InvokeNames.MessageFetchTask.
core/samples/StreamingBot/Program.cs	Updates sample to use new feedback mode constant.
core/samples/ExtAIBot/README.md	Documents the new sample’s architecture, setup, and flows.
core/samples/ExtAIBot/Program.cs	Wires up bot, streaming agent response, fetchTask feedback UI, and submit-feedback handler.
core/samples/ExtAIBot/Agent.cs	Implements streaming chat + per-conversation history + follow-up suggestion generation.
core/samples/ExtAIBot/LocalTools.cs	Adds local clarification tool that emits an Adaptive Card.
core/samples/ExtAIBot/McpTools.cs	Adds MCP client/tool wrapper to capture citations.
core/samples/ExtAIBot/CitationCollector.cs	Extracts citations from MCP results and builds Teams citation entities.
core/samples/ExtAIBot/appsettings.json	Adds sample configuration template.
core/samples/ExtAIBot/ExtAIBot.csproj	New sample project + package references.
core/core.slnx	Adds ExtAIBot to the core solution.

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[Copilot]

Pull request overview

Copilot reviewed 21 out of 21 changed files in this pull request and generated 8 comments.

Comments suppressed due to low confidence (1)

core/src/Microsoft.Teams.Apps/Schema/TeamsChannelData.cs:1

• The XML docs state FeedbackLoop takes precedence over FeedbackLoopEnabled, but the constructor currently leaves FeedbackLoopEnabled populated when both properties exist. To align behavior with the documented precedence (and avoid emitting/propagating a state Teams may reject), set FeedbackLoopEnabled = null when FeedbackLoop is successfully deserialized.

// Copyright (c) Microsoft Corporation.

[Copilot]

Pull request overview

Copilot reviewed 21 out of 21 changed files in this pull request and generated no new comments.