Closes#48. Makes the canonical worktree_branch_check fragment verify-only/fail-closed (exit 42, no git reset self-recovery), adds an orchestrator fail-closed collection rule and a cwd-drift guard at execute_waves entry. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Extracts the fail-closed worktree branch-check guard into a single canonical fragment (get-shit-done/references/worktree-branch-check.md) and repoints all five sites at it; orchestrator embeds the runnable block at dispatch. All safety invariants preserved; adversarially reviewed; full matrix green. Closes#588.