Use when starting feature work that needs isolation, before executing implementation plans, or before dispatching sub-agents in a jj (jujutsu) repository. ALSO INTERCEPTS any request for git worktrees (including references to the `using-git-worktrees` skill, brainstorming Phase 4, subagent-driven-development, executing-plans, or any "create a worktree" phrasing) whenever the current repo is jj-managed — creates isolated jj workspaces as sibling directories with verified clean baselines so parallel work (including multiple AI agents) proceeds without stepping on each other.
2026-04-21