# Install dependencies in the background after worktree creation

The `post-checkout` hook validates lockfiles synchronously (so conflicting lockfiles and malformed `packageManager` declarations still fail worktree creation fast), then spawns a detached installer child and exits immediately. The installer records its outcome in `<worktree gitdir>/pi-deps/status.json` with output appended to `install.log` in the same directory. Worktree creation no longer waits for installs; a Pi session opened in the worktree watches the status file and reports progress through an editor widget that auto-dismisses success after five seconds and keeps failures visible. Blocking creation was rejected because multi-minute frozen installs delayed every `git worktree add`; creator-side integrations were rejected because they miss non-Pi creators.