Release v0.19.0 (#904)

Author: abhinav

.changes/unreleased/Added-20241228-193338.yaml

@@ -0,0 +1,11 @@
+## <a name="v0.19.0">v0.19.0</a> - 2025-10-19
+### Added
+- Add experimental 'gs commit pick' to cherry-pick a commit and update upstack branches in one go. Opt into it with `git config --global spice.experiment.commitPick true`. The command presents an interactive prompt when invoked without any arguments. ![demo of gs commit pick](https://media.githubusercontent.com/media/abhinav/git-spice/refs/heads/main/doc/tapes/20251018-commit-pick.gif)
+- Add 'gs downstack track' command to track a manually created stack of branches in one go. ![demo of gs downstack track](https://media.githubusercontent.com/media/abhinav/git-spice/refs/heads/main/doc/tapes/20251005-downstack-track.gif)
+- {stack, upstack} restack: prompt for confirmation when invoked from trunk to prevent accidental full-repository restacking. To do this without a prompt, prefer using the `gs repo restack` command instead.
+- submit: Add `spice.submit.navigationCommentStyle.marker` configuration option to customize the marker in navigation comments
+### Changed
+- branch create: -m/--message now implies --commit
+- submit: Warn and prompt for confirmation when submitting branches with zero commits
+### Fixed
+- repo sync: Fix failure to delete merged branches after a sync operation because an upstack branch of the merged branch is checked out in a worktree.

.changes/unreleased/Added-20250928-161206.yaml

@@ -5,6 +5,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html),
 and is generated by [Changie](https://github.com/miniscruff/changie).
 
+## <a name="v0.19.0">v0.19.0</a> - 2025-10-19
+### Added
+- Add experimental 'gs commit pick' to cherry-pick a commit and update upstack branches in one go. Opt into it with `git config --global spice.experiment.commitPick true`. The command presents an interactive prompt when invoked without any arguments. ![demo of gs commit pick](https://media.githubusercontent.com/media/abhinav/git-spice/refs/heads/main/doc/tapes/20251018-commit-pick.gif)
+- Add 'gs downstack track' command to track a manually created stack of branches in one go. ![demo of gs downstack track](https://media.githubusercontent.com/media/abhinav/git-spice/refs/heads/main/doc/tapes/20251005-downstack-track.gif)
+- {stack, upstack} restack: prompt for confirmation when invoked from trunk to prevent accidental full-repository restacking. To do this without a prompt, prefer using the `gs repo restack` command instead.
+- submit: Add `spice.submit.navigationCommentStyle.marker` configuration option to customize the marker in navigation comments
+### Changed
+- branch create: -m/--message now implies --commit
+- submit: Warn and prompt for confirmation when submitting branches with zero commits
+### Fixed
+- repo sync: Fix failure to delete merged branches after a sync operation because an upstack branch of the merged branch is checked out in a worktree.
+
 ## <a name="v0.18.0">v0.18.0</a> - 2025-09-25
 
 A couple highlights from this release:

.changes/unreleased/Added-20251018-115634.yaml

@@ -395,7 +395,7 @@ and all branches below it in the stack.
 
 ### spice.submit.navigationCommentStyle.marker
 
-<!-- gs:version unreleased -->
+<!-- gs:version v0.19.0 -->
 
 Specifies the marker to use for the current change in navigation comments.