Team Worktree — Isolate the Implementation

Create a git worktree per involved repository so implementation happens on isolated branches without affecting any main working tree. In single-repo mode (the default) this is one worktree in the home repo. In multi-repo mode (when docs/plans/<id>/repos.md is present) it is one worktree per listed repo, all sharing the same <id> branch name.

Input

$ARGUMENTS is the artifact directory: docs/plans/<id>/. If empty, the discovery block below resolves it.

The directory's basename — <id> — is used as both the branch name and the worktree directory name in every involved repo.

Resolve the artifact directory by running this self-contained block (one bash call — agent threads reset cwd between calls):