feat: add git-wt worktree management to developer plugin

[devin-ai-integration]

Summary

Adds git-wt worktree management to the developer plugin as a new skill and slash command, enabling Claude to manage git worktrees for parallel development workflows.

Instead of bundling the script, an ensure-git-wt.sh setup script clones the upstream repo to ~/.local/share/git-wt at runtime, pinned to a known-good commit (f44fbfe) for supply-chain safety. Updates are attempted via fetch + checkout with graceful fallback to the existing local version on network failure.

What's added:

• plugins/developer/skills/git-worktree/ — skill with SKILL.md and ensure-git-wt.sh (clones upstream, pinned to commit)
• plugins/developer/commands/worktree.md — /worktree slash command (add, rm, ls, help) with subcommand validation
• git worktree:* bash permission in templates/settings.json
• Version bumps: plugin → 1.8.0, marketplace → 1.7.0

Updates since last revision

Addressed all 8 Copilot code review comments:

• ensure-git-wt.sh: Replaced git pull with fetch + checkout pinned to commit f44fbfe; added error handling with fallback for network failures; added clone error messages; added post-clone verification that the git-wt executable exists
• worktree.md (slash command): Removed $SKILL_DIR dependency (uses inline clone logic instead); added subcommand allowlist (add|rm|ls|help) with safe argument passing via case statement
• settings.json: Removed unused Bash(git wt:*) permission (git-wt is not installed as a git subcommand)
• SKILL.md: Fixed misleading "run once per session" heading; clarified that --non-interactive should not be used with init command

Review & Testing Checklist for Human

• Slash command variable resolution: worktree.md uses $ARGUMENTS — verify Claude Code actually resolves this variable in slash command context. If not, the argument parsing will fail silently.
• Slash command vs skill divergence: The slash command (worktree.md) uses inline clone logic that does not pin to the commit, while the skill's ensure-git-wt.sh does pin. Consider whether this inconsistency is acceptable or if the slash command should also pin.
• Overlap with existing branch: Branch tomasfejfar-worktree-skill-with-stale-detection has an alternative worktree skill with stale-worktree detection. Confirm this is the intended approach.
• Pinned commit freshness: The pinned commit f44fbfe is the current HEAD of vojtabiberle/git-wt. To update in the future, change GIT_WT_PINNED_COMMIT in ensure-git-wt.sh.

Suggested test plan:

1. Install the plugin in Claude Code
2. Test the skill: In a git repo, ask Claude to "create a worktree for feature/test from main" and verify it works
3. Test the slash command: Run /worktree ls and verify it executes correctly
4. Test network failure mode: Disconnect network, run the skill again, verify it falls back to existing version with a warning

Notes

• Requested by: Martin Vasko
• Link to Devin run

Release Notes

Justification, description

Adds git worktree management capability to the developer plugin via the external git-wt helper script, fetched from upstream at runtime and pinned to a known-good commit for security.

Plans for Customer Communication

N/A

Impact Analysis

N/A

Deployment Plan

N/A

Rollback Plan

N/A

Post-Release Support Plan

N/A

[devin-ai-integration]

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[Copilot]

Pull request overview

This PR adds git worktree management capability to the developer plugin through the external git-wt helper script. The implementation creates a new slash command /worktree and corresponding skill that fetches the git-wt tool from its upstream GitHub repository at runtime, enabling Claude to manage parallel development workflows via git worktrees.

Changes:

• New git-worktree skill with runtime fetching of external git-wt script
• New /worktree slash command with subcommands (add, rm, ls, help)
• Bash permissions for git worktree:* and git wt:* commands

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
plugins/developer/skills/git-worktree/SKILL.md	Skill documentation for git worktree management with git-wt
plugins/developer/skills/git-worktree/scripts/ensure-git-wt.sh	Script to clone/update git-wt from upstream repository
plugins/developer/commands/worktree.md	Slash command definition for /worktree
plugins/developer/templates/settings.json	Added bash permissions for git worktree and git wt commands
plugins/developer/README.md	Documentation updates for worktree feature and version bump to 1.8.0
plugins/developer/.claude-plugin/plugin.json	Version bump to 1.8.0
.claude-plugin/marketplace.json	Version bump to 1.7.0 and developer plugin to 1.8.0

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[Matovidlo]

@tomasfejfar I have tried to kickoff the git wt from Vojta but I am unsure how you meant it that it can be used via this plugin. I thought that it clones the repo if you do not have it or pull latest main and simply it uses it. I am not sure whether the skills of using it etc. shouldn't be rather there or here used by the agent