mstar-branch-worktree

Morning Star 业务仓 Git 功能分支、worktree 隔离与三写域模型（L1 跨 plan：主 checkout control root + iteration integration worktree + 每 plan feature worktree + execution_lease，默认 gitignore 下经 control 绝对路径读写进程产物；L2 同 plan：references/parallel-writable-pre-dispatch.md，N 次 invoke ≠ 隔离）、Spec 集成分支、QC/QA 检出对齐（Review cwd / Working branch / plan_id / Review range / Diff basis 三审 + QA 逐字相同）。Read when PM writes Working branch / Branch policy, iteration/parallel writable dispatch, QC/QA checkout alignment, or guarded post-merge worktree/branch cleanup (mstar worktree cleanup) is needed.