v0.6.4

Fixed

• /rite:pr:open branch creation is now worktree-isolated as a hard invariant under multi_session.enabled: true — branch creation re-resolves multi_session from rite-config.yml immediately before the branch is created (instead of relying on a [CONTEXT] marker that can be lost across resume / context compaction / mid-flow entry), so the git switch -c legacy path is reachable only when multi_session.enabled: false. After EnterWorktree, an invariant check verifies the repository top-level matches the worktree path and halts on mismatch instead of silently continuing on the main tree; flow-state.sh set --require-worktree emits a loud warning when a branch/PR phase would be recorded without a worktree. (#1596)