pkgmgr branch gc lists every branch and worktree of the repo (or of all managed repos with --all) together with the compose stacks found via com.docker.compose.project.working_dir. Branches whose tips are merged (ancestor of the default branch off its first-parent line, or head SHA of a merged GitHub PR) and whose worktrees are clean are removed with --apply: compose down -v plus the project's images, the worktree (foreign-owned files through a throwaway alpine container, metadata only after the checkout is gone), the local branch and the branch on every remote via push --force-with-lease. Default, protected, open-PR, busy and locked items are skipped; every item is re-checked right before it is removed. pkgmgr branch purge handles unmerged or dirty items with a confirmation per item.
Both refuse to act outside the host PID namespace, where processes and worktree locks cannot be verified. The fetch skips auto-maintenance, whose worktree-prune task deletes the metadata of sandboxed worktrees.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
