name: worktree-cleanup
description: Remove a subagent's .claude/worktrees/agent- dir after its PR merges. Triggers: git worktree remove, "Permission denied"/"Device or resource busy" on worktree cleanup, Windows file locks on bin/obj.
Worktree Cleanup (Windows)
The Agent tool's isolation: "worktree" auto-creates .claude/worktrees/agent-<id>/ and auto-removes it if the agent made no changes. Once an agent did change files and its PR has merged, the worktree is orphaned and needs manual cleanup — git worktree remove almost always fails with "Permission denied" on Windows because MSBuild's persistent build server and file watchers hold handles on bin//obj/ for a while after dotnet build/dotnet test exits. Don't bother expecting the plain command to succeed first try.
Landmine — the orchestrator's own Bash cwd is the most common lock. If you ever cd'd the Bash tool into a worktree path (or ran commands there) during the session, that shell holds a directory handle for as long as it stays parked there — rm -rf and even Remove-Item fail against it. Before any removal attempt, run pwd and confirm the Bash cwd is the primary checkout, not the worktree. cding away in a prior tool call doesn't guarantee it stuck — verify, don't assume.
Sequence, run from the primary checkout:
- Confirm Bash cwd is NOT inside the worktree (
pwd); cd out first if it is.
git worktree remove --force .claude/worktrees/agent-<id> — clears git's bookkeeping even when the underlying rm fails. Check git worktree list to confirm the entry is gone.- If the directory still exists on disk,
dotnet build-server shutdown (releases MSBuild/Roslyn server handles), then retry deletion.
- If it still won't delete, switch tools: PowerShell's
Remove-Item -Recurse -Force "<path>" succeeds where bash rm -rf reports "Device or resource busy" — this is a real, repeatable difference in this environment, not a fluke. Prefer it as the fallback rather than retrying rm.
git worktree prune -v, then verify: git worktree list (entry absent) and list the .claude/worktrees/ dir (no leftover folder).
If PowerShell's Remove-Item still fails: check for a Visual Studio instance (or its ServiceHub.*.exe/indexer) with that worktree open, or stray dotnet/MSBuild/VBCSCompiler.exe processes beyond what build-server shutdown released — kill or ask the user before force-killing anything unidentified.
Don't trust the agent's self-report of what it created as a workaround. An agent that hit a build dependency needing a specific sibling-directory name may describe its fix as a "symlink/junction," but actually run git worktree add at that path (a second real worktree, invisible in git worktree list under the original name). If git worktree remove on the original leaves a same-named directory elsewhere that a plain rmdir/Remove-Item refuses with "not empty" rather than deleting instantly (reparse points delete instantly regardless of contents), it's a real directory, not a link — check (Get-Item $path).Attributes for ReparsePoint before assuming, and if absent, treat it as an orphaned worktree copy: safe to delete outright once its PR has merged.
