diff --git a/bundler/lib/bundler/dependency.rb b/bundler/lib/bundler/dependency.rb
index cb9c7a76eab8..35aa71902737 100644
--- a/bundler/lib/bundler/dependency.rb
+++ b/bundler/lib/bundler/dependency.rb
@@ -58,6 +58,12 @@ def glob
       @glob = @options["glob"]
     end
 
+    def sparse_checkout
+      return @sparse_checkout if defined?(@sparse_checkout)
+
+      @sparse_checkout = @options["sparse_checkout"]
+    end
+
     def platforms
       @platforms ||= Array(@options["platforms"])
     end
diff --git a/bundler/lib/bundler/dsl.rb b/bundler/lib/bundler/dsl.rb
index 6f06c4e91879..76a8d24b13ee 100644
--- a/bundler/lib/bundler/dsl.rb
+++ b/bundler/lib/bundler/dsl.rb
@@ -17,7 +17,7 @@ def self.evaluate(gemfile, lockfile, unlock)
     VALID_PLATFORMS = Bundler::CurrentRuby::PLATFORM_MAP.keys.freeze
 
     VALID_KEYS = %w[group groups git path glob name branch ref tag require submodules
-                    platform platforms source install_if force_ruby_platform].freeze
+                    platform platforms source install_if force_ruby_platform sparse_checkout].freeze
 
     GITHUB_PULL_REQUEST_URL = %r{\Ahttps://github\.com/([A-Za-z0-9_\-\.]+/[A-Za-z0-9_\-\.]+)/pull/(\d+)\z}
     GITLAB_MERGE_REQUEST_URL = %r{\Ahttps://gitlab\.com/([A-Za-z0-9_\-\./]+)/-/merge_requests/(\d+)\z}
diff --git a/bundler/lib/bundler/lockfile_parser.rb b/bundler/lib/bundler/lockfile_parser.rb
index ac0ce1ef3d0a..b3bde007c04c 100644
--- a/bundler/lib/bundler/lockfile_parser.rb
+++ b/bundler/lib/bundler/lockfile_parser.rb
@@ -47,7 +47,7 @@ def to_s
     PATH         = "PATH"
     PLUGIN       = "PLUGIN SOURCE"
     SPECS        = "  specs:"
-    OPTIONS      = /^  ([a-z]+): (.*)$/i
+    OPTIONS      = /^  ([a-z_]+): (.*)$/i
     SOURCE       = [GIT, GEM, PATH, PLUGIN].freeze
 
     SECTIONS_BY_VERSION_INTRODUCED = {
diff --git a/bundler/lib/bundler/man/bundle-add.1 b/bundler/lib/bundler/man/bundle-add.1
index 4474969db608..f5975c70230c 100644
--- a/bundler/lib/bundler/man/bundle-add.1
+++ b/bundler/lib/bundler/man/bundle-add.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-ADD" "1" "September 2025" ""
+.TH "BUNDLE\-ADD" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-add\fR \- Add gem to the Gemfile and run bundle install
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-binstubs.1 b/bundler/lib/bundler/man/bundle-binstubs.1
index b8c153696bba..314d4ef61308 100644
--- a/bundler/lib/bundler/man/bundle-binstubs.1
+++ b/bundler/lib/bundler/man/bundle-binstubs.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-BINSTUBS" "1" "September 2025" ""
+.TH "BUNDLE\-BINSTUBS" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-binstubs\fR \- Install the binstubs of the listed gems
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-cache.1 b/bundler/lib/bundler/man/bundle-cache.1
index c1dafbf07052..0d20662b7b69 100644
--- a/bundler/lib/bundler/man/bundle-cache.1
+++ b/bundler/lib/bundler/man/bundle-cache.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CACHE" "1" "September 2025" ""
+.TH "BUNDLE\-CACHE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-cache\fR \- Package your needed \fB\.gem\fR files into your application
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-check.1 b/bundler/lib/bundler/man/bundle-check.1
index f83af1eb5577..154fb06818f4 100644
--- a/bundler/lib/bundler/man/bundle-check.1
+++ b/bundler/lib/bundler/man/bundle-check.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CHECK" "1" "September 2025" ""
+.TH "BUNDLE\-CHECK" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-check\fR \- Verifies if dependencies are satisfied by installed gems
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-clean.1 b/bundler/lib/bundler/man/bundle-clean.1
index c4d148c5df83..47fb8f92aa2c 100644
--- a/bundler/lib/bundler/man/bundle-clean.1
+++ b/bundler/lib/bundler/man/bundle-clean.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CLEAN" "1" "September 2025" ""
+.TH "BUNDLE\-CLEAN" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-clean\fR \- Cleans up unused gems in your bundler directory
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-config.1 b/bundler/lib/bundler/man/bundle-config.1
index 05c13e2d0f32..bdab2a9730da 100644
--- a/bundler/lib/bundler/man/bundle-config.1
+++ b/bundler/lib/bundler/man/bundle-config.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CONFIG" "1" "September 2025" ""
+.TH "BUNDLE\-CONFIG" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-config\fR \- Set bundler configuration options
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-console.1 b/bundler/lib/bundler/man/bundle-console.1
index 5ab15668be7b..3e3db532e434 100644
--- a/bundler/lib/bundler/man/bundle-console.1
+++ b/bundler/lib/bundler/man/bundle-console.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-CONSOLE" "1" "September 2025" ""
+.TH "BUNDLE\-CONSOLE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-console\fR \- Open an IRB session with the bundle pre\-loaded
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-doctor.1 b/bundler/lib/bundler/man/bundle-doctor.1
index a0329dfc4813..f5b2be400722 100644
--- a/bundler/lib/bundler/man/bundle-doctor.1
+++ b/bundler/lib/bundler/man/bundle-doctor.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-DOCTOR" "1" "September 2025" ""
+.TH "BUNDLE\-DOCTOR" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-doctor\fR \- Checks the bundle for common problems
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-env.1 b/bundler/lib/bundler/man/bundle-env.1
index eee3ca05d0c6..a6d11a3d3c08 100644
--- a/bundler/lib/bundler/man/bundle-env.1
+++ b/bundler/lib/bundler/man/bundle-env.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-ENV" "1" "September 2025" ""
+.TH "BUNDLE\-ENV" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-env\fR \- Print information about the environment Bundler is running under
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-exec.1 b/bundler/lib/bundler/man/bundle-exec.1
index 24c84889b5bf..62c9245b003a 100644
--- a/bundler/lib/bundler/man/bundle-exec.1
+++ b/bundler/lib/bundler/man/bundle-exec.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-EXEC" "1" "September 2025" ""
+.TH "BUNDLE\-EXEC" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-exec\fR \- Execute a command in the context of the bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-fund.1 b/bundler/lib/bundler/man/bundle-fund.1
index fe24a25ca12c..a09a4ed97cfc 100644
--- a/bundler/lib/bundler/man/bundle-fund.1
+++ b/bundler/lib/bundler/man/bundle-fund.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-FUND" "1" "September 2025" ""
+.TH "BUNDLE\-FUND" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-fund\fR \- Lists information about gems seeking funding assistance
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-gem.1 b/bundler/lib/bundler/man/bundle-gem.1
index 85c0f57674a4..33cacbe5323b 100644
--- a/bundler/lib/bundler/man/bundle-gem.1
+++ b/bundler/lib/bundler/man/bundle-gem.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-GEM" "1" "September 2025" ""
+.TH "BUNDLE\-GEM" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-gem\fR \- Generate a project skeleton for creating a rubygem
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-help.1 b/bundler/lib/bundler/man/bundle-help.1
index 05fd5a7c4844..3a97e56a1fcb 100644
--- a/bundler/lib/bundler/man/bundle-help.1
+++ b/bundler/lib/bundler/man/bundle-help.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-HELP" "1" "September 2025" ""
+.TH "BUNDLE\-HELP" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-help\fR \- Displays detailed help for each subcommand
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-info.1 b/bundler/lib/bundler/man/bundle-info.1
index 96c7d876f64a..39ff74a7d975 100644
--- a/bundler/lib/bundler/man/bundle-info.1
+++ b/bundler/lib/bundler/man/bundle-info.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-INFO" "1" "September 2025" ""
+.TH "BUNDLE\-INFO" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-info\fR \- Show information for the given gem in your bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-init.1 b/bundler/lib/bundler/man/bundle-init.1
index 83dad5c050bf..a053ac4c4c35 100644
--- a/bundler/lib/bundler/man/bundle-init.1
+++ b/bundler/lib/bundler/man/bundle-init.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-INIT" "1" "September 2025" ""
+.TH "BUNDLE\-INIT" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-init\fR \- Generates a Gemfile into the current working directory
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-install.1 b/bundler/lib/bundler/man/bundle-install.1
index 68530f3ebb58..21997fb29091 100644
--- a/bundler/lib/bundler/man/bundle-install.1
+++ b/bundler/lib/bundler/man/bundle-install.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-INSTALL" "1" "September 2025" ""
+.TH "BUNDLE\-INSTALL" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-install\fR \- Install the dependencies specified in your Gemfile
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-issue.1 b/bundler/lib/bundler/man/bundle-issue.1
index 394d6c546910..f5033d6e076c 100644
--- a/bundler/lib/bundler/man/bundle-issue.1
+++ b/bundler/lib/bundler/man/bundle-issue.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-ISSUE" "1" "September 2025" ""
+.TH "BUNDLE\-ISSUE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-issue\fR \- Get help reporting Bundler issues
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-licenses.1 b/bundler/lib/bundler/man/bundle-licenses.1
index 2931e42dd7e8..39dcf0bd38b9 100644
--- a/bundler/lib/bundler/man/bundle-licenses.1
+++ b/bundler/lib/bundler/man/bundle-licenses.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-LICENSES" "1" "September 2025" ""
+.TH "BUNDLE\-LICENSES" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-licenses\fR \- Print the license of all gems in the bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-list.1 b/bundler/lib/bundler/man/bundle-list.1
index d8bcf20585a4..34d25ae12c26 100644
--- a/bundler/lib/bundler/man/bundle-list.1
+++ b/bundler/lib/bundler/man/bundle-list.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-LIST" "1" "September 2025" ""
+.TH "BUNDLE\-LIST" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-list\fR \- List all the gems in the bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-lock.1 b/bundler/lib/bundler/man/bundle-lock.1
index 478d17353507..eb5c8732cc01 100644
--- a/bundler/lib/bundler/man/bundle-lock.1
+++ b/bundler/lib/bundler/man/bundle-lock.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-LOCK" "1" "September 2025" ""
+.TH "BUNDLE\-LOCK" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-lock\fR \- Creates / Updates a lockfile without installing
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-open.1 b/bundler/lib/bundler/man/bundle-open.1
index 2f13b1329fc1..1d9463d12b1b 100644
--- a/bundler/lib/bundler/man/bundle-open.1
+++ b/bundler/lib/bundler/man/bundle-open.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-OPEN" "1" "September 2025" ""
+.TH "BUNDLE\-OPEN" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-open\fR \- Opens the source directory for a gem in your bundle
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-outdated.1 b/bundler/lib/bundler/man/bundle-outdated.1
index 7e10d202bedf..28d361754a3d 100644
--- a/bundler/lib/bundler/man/bundle-outdated.1
+++ b/bundler/lib/bundler/man/bundle-outdated.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-OUTDATED" "1" "September 2025" ""
+.TH "BUNDLE\-OUTDATED" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-outdated\fR \- List installed gems with newer versions available
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-platform.1 b/bundler/lib/bundler/man/bundle-platform.1
index 6a3a08c3a93a..cb53cd192dcf 100644
--- a/bundler/lib/bundler/man/bundle-platform.1
+++ b/bundler/lib/bundler/man/bundle-platform.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-PLATFORM" "1" "September 2025" ""
+.TH "BUNDLE\-PLATFORM" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-platform\fR \- Displays platform compatibility information
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-plugin.1 b/bundler/lib/bundler/man/bundle-plugin.1
index 25da56247598..5c019b305d80 100644
--- a/bundler/lib/bundler/man/bundle-plugin.1
+++ b/bundler/lib/bundler/man/bundle-plugin.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-PLUGIN" "1" "September 2025" ""
+.TH "BUNDLE\-PLUGIN" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-plugin\fR \- Manage Bundler plugins
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-pristine.1 b/bundler/lib/bundler/man/bundle-pristine.1
index a8316b5cca1e..0973d63e4edd 100644
--- a/bundler/lib/bundler/man/bundle-pristine.1
+++ b/bundler/lib/bundler/man/bundle-pristine.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-PRISTINE" "1" "September 2025" ""
+.TH "BUNDLE\-PRISTINE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-pristine\fR \- Restores installed gems to their pristine condition
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-remove.1 b/bundler/lib/bundler/man/bundle-remove.1
index 4dc7a03b9f5d..3398d6cd330c 100644
--- a/bundler/lib/bundler/man/bundle-remove.1
+++ b/bundler/lib/bundler/man/bundle-remove.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-REMOVE" "1" "September 2025" ""
+.TH "BUNDLE\-REMOVE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-remove\fR \- Removes gems from the Gemfile
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-show.1 b/bundler/lib/bundler/man/bundle-show.1
index 901460962cfe..05ff3205766f 100644
--- a/bundler/lib/bundler/man/bundle-show.1
+++ b/bundler/lib/bundler/man/bundle-show.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-SHOW" "1" "September 2025" ""
+.TH "BUNDLE\-SHOW" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-show\fR \- Shows all the gems in your bundle, or the path to a gem
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-update.1 b/bundler/lib/bundler/man/bundle-update.1
index 2f9932dc1e5e..db078d74fc84 100644
--- a/bundler/lib/bundler/man/bundle-update.1
+++ b/bundler/lib/bundler/man/bundle-update.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-UPDATE" "1" "September 2025" ""
+.TH "BUNDLE\-UPDATE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-update\fR \- Update your gems to the latest available versions
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle-version.1 b/bundler/lib/bundler/man/bundle-version.1
index 6462ec795832..8f9088451bb0 100644
--- a/bundler/lib/bundler/man/bundle-version.1
+++ b/bundler/lib/bundler/man/bundle-version.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE\-VERSION" "1" "September 2025" ""
+.TH "BUNDLE\-VERSION" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\-version\fR \- Prints Bundler version information
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/bundle.1 b/bundler/lib/bundler/man/bundle.1
index 9f7feb4133d7..8613924602a0 100644
--- a/bundler/lib/bundler/man/bundle.1
+++ b/bundler/lib/bundler/man/bundle.1
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "BUNDLE" "1" "September 2025" ""
+.TH "BUNDLE" "1" "February 2026" ""
 .SH "NAME"
 \fBbundle\fR \- Ruby Dependency Management
 .SH "SYNOPSIS"
diff --git a/bundler/lib/bundler/man/gemfile.5 b/bundler/lib/bundler/man/gemfile.5
index a8c055a0c1a4..59e41623e84b 100644
--- a/bundler/lib/bundler/man/gemfile.5
+++ b/bundler/lib/bundler/man/gemfile.5
@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "GEMFILE" "5" "September 2025" ""
+.TH "GEMFILE" "5" "February 2026" ""
 .SH "NAME"
 \fBGemfile\fR \- A format for describing gem dependencies for Ruby programs
 .SH "SYNOPSIS"
@@ -293,6 +293,13 @@ gem "rails", git: "https://github\.com/rails/rails\.git", ref: "4aded"
 .TP
 \fBsubmodules\fR
 For reference, a git submodule \fIhttps://git\-scm\.com/book/en/v2/Git\-Tools\-Submodules\fR lets you have another git repository within a subfolder of your repository\. Specify \fBsubmodules: true\fR to cause bundler to expand any submodules included in the git repository
+.TP
+\fBsparse_checkout\fR
+Specify a directory to include when checking out a git repository\. Uses git's sparse\-checkout feature (requires git 2\.25+) to only download the specified directory, reducing disk usage for large repos\.
+.IP
+gem "foo", git: "https://github\.com/org/monorepo\.git", sparse_checkout: "packages/foo", glob: "packages/foo/*\.gemspec"
+.IP
+On git versions below 2\.25, the entire repository will be cloned with a warning\.
 .P
 If a git repository contains multiple \fB\.gemspecs\fR, each \fB\.gemspec\fR represents a gem located at the same place in the file system as the \fB\.gemspec\fR\.
 .IP "" 4
diff --git a/bundler/lib/bundler/man/gemfile.5.ronn b/bundler/lib/bundler/man/gemfile.5.ronn
index 18d7bb826e44..5d508be19eef 100644
--- a/bundler/lib/bundler/man/gemfile.5.ronn
+++ b/bundler/lib/bundler/man/gemfile.5.ronn
@@ -352,6 +352,18 @@ Git repositories support a number of additional options.
     Specify `submodules: true` to cause bundler to expand any
     submodules included in the git repository
 
+  * `sparse_checkout`:
+    Specify a directory to include when checking out a git repository.
+    Uses git's sparse-checkout feature (requires git 2.25+) to only
+    download the specified directory, reducing disk usage for large repos.
+
+      gem "foo", git: "https://github.com/org/monorepo.git",
+                 sparse_checkout: "packages/foo",
+                 glob: "packages/foo/*.gemspec"
+
+    On git versions below 2.25, the entire repository will be cloned
+    with a warning.
+
 If a git repository contains multiple `.gemspecs`, each `.gemspec`
 represents a gem located at the same place in the file system as
 the `.gemspec`.
diff --git a/bundler/lib/bundler/source/git.rb b/bundler/lib/bundler/source/git.rb
index bb669ebba39d..5ebfe4f58bd2 100644
--- a/bundler/lib/bundler/source/git.rb
+++ b/bundler/lib/bundler/source/git.rb
@@ -7,7 +7,7 @@ class Source
     class Git < Path
       autoload :GitProxy, File.expand_path("git/git_proxy", __dir__)
 
-      attr_reader :uri, :ref, :branch, :options, :glob, :submodules
+      attr_reader :uri, :ref, :branch, :options, :glob, :submodules, :sparse_checkout
 
       def initialize(options)
         @options = options
@@ -25,6 +25,7 @@ def initialize(options)
         @branch     = options["branch"]
         @ref        = options["ref"] || options["branch"] || options["tag"]
         @submodules = options["submodules"]
+        @sparse_checkout = options["sparse_checkout"]
         @name       = options["name"]
         @version    = options["version"].to_s.strip.gsub("-", ".pre.")
 
@@ -57,12 +58,13 @@ def to_lock
         %w[ref branch tag submodules].each do |opt|
           out << "  #{opt}: #{options[opt]}\n" if options[opt]
         end
+        out << "  sparse_checkout: #{@sparse_checkout}\n" if @sparse_checkout
         out << "  glob: #{@glob}\n" unless default_glob?
         out << "  specs:\n"
       end
 
       def to_gemfile
-        specifiers = %w[ref branch tag submodules glob].map do |opt|
+        specifiers = %w[ref branch tag submodules glob sparse_checkout].map do |opt|
           "#{opt}: #{options[opt]}" if options[opt]
         end
 
@@ -70,14 +72,15 @@ def to_gemfile
       end
 
       def hash
-        [self.class, uri, ref, branch, name, glob, submodules].hash
+        [self.class, uri, ref, branch, name, glob, submodules, sparse_checkout].hash
       end
 
       def eql?(other)
         other.is_a?(Git) && uri == other.uri && ref == other.ref &&
           branch == other.branch && name == other.name &&
           glob == other.glob &&
-          submodules == other.submodules
+          submodules == other.submodules &&
+          sparse_checkout == other.sparse_checkout
       end
 
       alias_method :==, :eql?
@@ -86,7 +89,8 @@ def include?(other)
         other.is_a?(Git) && uri == other.uri &&
           name == other.name &&
           glob == other.glob &&
-          submodules == other.submodules
+          submodules == other.submodules &&
+          sparse_checkout == other.sparse_checkout
       end
 
       def to_s
@@ -126,17 +130,13 @@ def name
       # checkout of the git repository. When using local git
       # repos, this is set to the local repo.
       def install_path
-        @install_path ||= begin
-          git_scope = "#{base_name}-#{shortref_for_path(revision)}"
-
-          Bundler.install_path.join(git_scope)
-        end
+        @install_path ||= Bundler.install_path.join("#{base_name}-#{shortref_for_path(revision, sparse_checkout: @sparse_checkout)}")
       end
 
       alias_method :path, :install_path
 
       def extension_dir_name
-        "#{base_name}-#{shortref_for_path(revision)}"
+        "#{base_name}-#{shortref_for_path(revision, sparse_checkout: @sparse_checkout)}"
       end
 
       def unlock!
@@ -246,7 +246,7 @@ def cache_path
       end
 
       def app_cache_dirname
-        "#{base_name}-#{shortref_for_path(locked_revision || revision)}"
+        "#{base_name}-#{shortref_for_path(locked_revision || revision, sparse_checkout: @sparse_checkout)}"
       end
 
       def revision
@@ -375,8 +375,10 @@ def shortref_for_display(ref)
         ref[0..6]
       end
 
-      def shortref_for_path(ref)
-        ref[0..11]
+      def shortref_for_path(ref, sparse_checkout: nil)
+        scope = ref[0..11]
+        scope += "-#{Bundler::Digest.sha1(sparse_checkout)[0..7]}" if sparse_checkout
+        scope
       end
 
       def glob_for_display
@@ -432,7 +434,9 @@ def load_gemspec(file)
       end
 
       def git_scope
-        "#{base_name}-#{uri_hash}"
+        scope = "#{base_name}-#{uri_hash}"
+        scope += "-#{Bundler::Digest.sha1(@sparse_checkout)[0..7]}" if @sparse_checkout
+        scope
       end
 
       def extension_cache_slug(_)
diff --git a/bundler/lib/bundler/source/git/git_proxy.rb b/bundler/lib/bundler/source/git/git_proxy.rb
index fe05e9d57b27..4bffb2b44f2c 100644
--- a/bundler/lib/bundler/source/git/git_proxy.rb
+++ b/bundler/lib/bundler/source/git/git_proxy.rb
@@ -54,7 +54,7 @@ def initialize(options)
       # All actions required by the Git source is encapsulated in this
       # object.
       class GitProxy
-        attr_accessor :path, :uri, :branch, :tag, :ref, :explicit_ref
+        attr_accessor :path, :uri, :branch, :tag, :ref, :explicit_ref, :sparse_checkout
         attr_writer :revision
 
         def initialize(path, uri, options = {}, revision = nil, git = nil)
@@ -72,6 +72,7 @@ def initialize(path, uri, options = {}, revision = nil, git = nil)
           @revision = revision
           @git      = git
           @commit_ref = nil
+          @sparse_checkout = options["sparse_checkout"]
         end
 
         def revision
@@ -106,6 +107,7 @@ def checkout
 
           extra_fetch_needed = clone_needs_extra_fetch?
           unshallow_needed = clone_needs_unshallow?
+
           return unless extra_fetch_needed || unshallow_needed
 
           git_remote_fetch(unshallow_needed ? ["--unshallow"] : depth_args)
@@ -120,7 +122,13 @@ def copy_to(destination, submodules = false)
               SharedHelpers.filesystem_access(destination) do |p|
                 FileUtils.rm_rf(p)
               end
-              git "clone", "--no-checkout", "--quiet", path.to_s, destination.to_s
+              if @sparse_checkout && supports_partial_clone?
+                Bundler.ui.debug "Using partial clone with sparse checkout for #{@sparse_checkout}"
+                git(*build_sparse_checkout_clone_args(destination))
+              else
+                git "clone", "--no-checkout", "--quiet", path.to_s, destination.to_s
+              end
+
               File.chmod((File.stat(destination).mode | 0o777) & ~File.umask, destination)
             rescue Errno::EEXIST => e
               file_path = e.message[%r{.*?((?:[a-zA-Z]:)?/.*)}, 1]
@@ -130,6 +138,8 @@ def copy_to(destination, submodules = false)
             end
           end
 
+          setup_sparse_checkout(destination)
+
           ref = @commit_ref || (locked_to_full_sha? && @revision)
           if ref
             git "config", "uploadpack.allowAnySHA1InWant", "true", dir: path.to_s if @commit_ref.nil? && needs_allow_any_sha1_in_want?
@@ -156,6 +166,7 @@ def installed_to?(destination)
         private
 
         def git_remote_fetch(args)
+          args = [*partial_clone_filter_args, *args]
           command = ["fetch", "--force", "--quiet", "--no-tags", *args, "--", configured_uri, refspec].compact
           command_with_no_credentials = check_allowed(command)
 
@@ -412,15 +423,16 @@ def capture3_args_for(cmd, dir)
         end
 
         def extra_clone_args
-          args = depth_args
-          return [] if args.empty?
+          filter_args = partial_clone_filter_args
+          args = depth_args.dup
+          return filter_args if args.empty?
 
           args += ["--single-branch"]
           args.unshift("--no-tags") if supports_cloning_with_no_tags?
+          args.unshift(*filter_args)
 
           # If there's a locked revision, no need to clone any specific branch
-          # or tag, since we will end up checking out that locked revision
-          # anyways.
+          # or tag, since we will end up checking out that locked revision anyways.
           return args if @revision
 
           args += ["--branch", branch_option] if branch_option
@@ -458,6 +470,41 @@ def supports_fetching_unreachable_refs?
         def supports_cloning_with_no_tags?
           @supports_cloning_with_no_tags ||= Gem::Version.new(version) >= Gem::Version.new("2.14.0-rc0")
         end
+
+        def supports_sparse_checkout?
+          @supports_sparse_checkout ||= Gem::Version.new(version) >= Gem::Version.new("2.25.0")
+        end
+
+        def supports_partial_clone?
+          @supports_partial_clone ||= Gem::Version.new(version) >= Gem::Version.new("2.17.0")
+        end
+
+        def partial_clone_filter_args
+          return [] unless @sparse_checkout && supports_partial_clone?
+          ["--filter=blob:none"]
+        end
+
+        def build_sparse_checkout_clone_args(destination)
+          args = ["clone", *partial_clone_filter_args, "--no-checkout", "--quiet"]
+          args.concat(depth_args) unless depth_args.empty?
+          args << "--single-branch"
+          args << "--no-tags" if supports_cloning_with_no_tags?
+          args << "--branch" << branch_option if branch_option
+          args.concat([configured_uri, destination.to_s])
+          args
+        end
+
+        def setup_sparse_checkout(destination)
+          return unless @sparse_checkout
+
+          unless supports_sparse_checkout?
+            Bundler.ui.warn "Git #{version} doesn't support sparse-checkout (requires 2.25+). Cloning full repository."
+            return
+          end
+
+          Bundler.ui.debug "Setting sparse checkout to only include #{@sparse_checkout}"
+          git "sparse-checkout", "set", "--cone", @sparse_checkout, dir: destination
+        end
       end
     end
   end
diff --git a/bundler/spec/bundler/source/git/git_proxy_spec.rb b/bundler/spec/bundler/source/git/git_proxy_spec.rb
index b2b7ab5c5400..a11f0ee34100 100644
--- a/bundler/spec/bundler/source/git/git_proxy_spec.rb
+++ b/bundler/spec/bundler/source/git/git_proxy_spec.rb
@@ -334,4 +334,68 @@
       end
     end
   end
+
+  describe "#supports_sparse_checkout?" do
+    it "returns true for git 2.25+" do
+      allow(git_proxy).to receive(:git_local).with("--version").and_return("git version 2.25.0")
+      expect(git_proxy.send(:supports_sparse_checkout?)).to be true
+    end
+
+    it "returns true for git 2.30+" do
+      allow(git_proxy).to receive(:git_local).with("--version").and_return("git version 2.30.0")
+      expect(git_proxy.send(:supports_sparse_checkout?)).to be true
+    end
+
+    it "returns false for git < 2.25" do
+      allow(git_proxy).to receive(:git_local).with("--version").and_return("git version 2.24.0")
+      expect(git_proxy.send(:supports_sparse_checkout?)).to be false
+    end
+
+    it "returns false for git 2.20" do
+      allow(git_proxy).to receive(:git_local).with("--version").and_return("git version 2.20.0")
+      expect(git_proxy.send(:supports_sparse_checkout?)).to be false
+    end
+  end
+
+  describe "#setup_sparse_checkout" do
+    let(:destination) { Pathname("destination") }
+
+    context "with sparse_checkout option" do
+      let(:options) { { "sparse_checkout" => "packages/foo" } }
+
+      context "with git 2.25+" do
+        it "runs sparse-checkout set with cone mode" do
+          allow(git_proxy).to receive(:git_local).with("--version").and_return("git version 2.30.0")
+          expect(git_proxy).to receive(:git).with("sparse-checkout", "set", "--cone", "packages/foo", dir: destination)
+          git_proxy.send(:setup_sparse_checkout, destination)
+        end
+      end
+
+      context "with git < 2.25" do
+        it "skips sparse checkout and warns" do
+          allow(git_proxy).to receive(:git_local).with("--version").and_return("git version 2.20.0")
+          expect(Bundler.ui).to receive(:warn).with(/doesn't support sparse-checkout/)
+          expect(git_proxy).not_to receive(:git).with("sparse-checkout", any_args)
+          git_proxy.send(:setup_sparse_checkout, destination)
+        end
+      end
+    end
+
+    context "without sparse_checkout option" do
+      let(:options) { {} }
+
+      it "does nothing" do
+        expect(git_proxy).not_to receive(:git)
+        git_proxy.send(:setup_sparse_checkout, destination)
+      end
+    end
+  end
+
+  context "with sparse_checkout option" do
+    let(:options) { { "sparse_checkout" => "packages/foo" } }
+
+    it "stores sparse_checkout from options" do
+      expect(git_proxy.sparse_checkout).to eq("packages/foo")
+    end
+  end
 end
diff --git a/bundler/spec/install/gemfile/git_sparse_checkout_spec.rb b/bundler/spec/install/gemfile/git_sparse_checkout_spec.rb
new file mode 100644
index 000000000000..6ef363b2e70c
--- /dev/null
+++ b/bundler/spec/install/gemfile/git_sparse_checkout_spec.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+RSpec.describe "bundle install with git sources and sparse_checkout" do
+  describe "with sparse_checkout option" do
+    it "only checks out the specified directory" do
+      build_lib "foo", "1.0", path: lib_path("monorepo/packages/foo")
+      build_lib "bar", "2.0", path: lib_path("monorepo/packages/bar")
+      build_git "monorepo", path: lib_path("monorepo"), gemspec: false
+
+      install_gemfile <<-G
+        source "https://gem.repo1"
+        gem "foo", git: "#{lib_path("monorepo")}",
+                   sparse_checkout: "packages/foo",
+                   glob: "packages/foo/*.gemspec"
+      G
+
+      expect(the_bundle).to include_gems "foo 1.0"
+
+      # Verify only sparse_checkout dir exists (when git 2.25+)
+      gem_path = Dir[default_bundle_path("bundler/gems/monorepo-*")].first
+      git_version = Gem::Version.new(`git --version`.match(/\d+\.\d+\.\d+/)[0])
+      if git_version >= Gem::Version.new("2.25.0")
+        expect(Dir.exist?("#{gem_path}/packages/foo")).to be true
+        expect(Dir.exist?("#{gem_path}/packages/bar")).to be false
+      end
+    end
+  end
+
+  describe "lockfile round-trip" do
+    it "preserves sparse_checkout in lockfile" do
+      build_lib "foo", "1.0", path: lib_path("monorepo/packages/foo")
+      build_git "monorepo", path: lib_path("monorepo"), gemspec: false
+
+      install_gemfile <<-G
+        source "https://gem.repo1"
+        gem "foo", git: "#{lib_path("monorepo")}",
+                   sparse_checkout: "packages/foo",
+                   glob: "packages/foo/*.gemspec"
+      G
+
+      lockfile_content = File.read(bundled_app_lock)
+      expect(lockfile_content).to include("sparse_checkout: packages/foo")
+
+      # Re-run bundle install with existing lockfile
+      bundle :install
+      expect(the_bundle).to include_gems "foo 1.0"
+    end
+  end
+
+  describe "multiple gems from same repo with different sparse_checkouts" do
+    it "creates separate sources for each sparse_checkout" do
+      build_lib "foo", "1.0", path: lib_path("monorepo/packages/foo")
+      build_lib "bar", "2.0", path: lib_path("monorepo/packages/bar")
+      build_git "monorepo", path: lib_path("monorepo"), gemspec: false
+
+      install_gemfile <<-G
+        source "https://gem.repo1"
+        gem "foo", git: "#{lib_path("monorepo")}",
+                   sparse_checkout: "packages/foo",
+                   glob: "packages/foo/*.gemspec"
+        gem "bar", git: "#{lib_path("monorepo")}",
+                   sparse_checkout: "packages/bar",
+                   glob: "packages/bar/*.gemspec"
+      G
+
+      expect(the_bundle).to include_gems "foo 1.0", "bar 2.0"
+
+      # Different sparse_checkouts = different cache directories
+      cache_dirs = Dir[default_bundle_path("cache/bundler/git/monorepo-*")]
+      expect(cache_dirs.size).to eq(2)
+    end
+  end
+end