dsh-worktree

Harness subagents already isolate messages, permission policies, and tool sets, yet they all share the same working tree — one child's writes can directly affect another's. dsh-worktree fills that gap with git worktrees: every subagent runs in its own directory under /.dsh/worktrees/, sharing the repository object store while keeping its working tree fully private. The ctx.worktree service covers the full lifecycle of creating, restoring, listing, and removing worktrees, with strict slug validation, fail-closed change detection, automatic config and hooks-path inheritance on creation, and per-repository mutation serialization with idempotent concurrent acquires. Human operators get /worktree create, list, and remove slash commands, and stale temporary worktrees are swept periodically. The plugin suits developers running multi-subagent parallel tasks in Harness and plugin authors who need isolated filesystems for children without hand-rolling git logic — a single acquire() call yields a private environment.