Function restoreWorktreeForResume

src/utils/sessionRestore.ts:332–366

(
  worktreeSession: PersistedWorktreeSession | null | undefined,
)

 * it back to disk.
 */
export function restoreWorktreeForResume(
  worktreeSession: PersistedWorktreeSession | null | undefined,
): void {
  const fresh = getCurrentWorktreeSession()
  if (fresh) {
    saveWorktreeState(fresh)
    return
  }
  if (!worktreeSession) return

  try {
    process.chdir(worktreeSession.worktreePath)
  } catch {
    // Directory is gone. Override the stale cache so the next
    // reAppendSessionMetadata records "exited" instead of re-persisting
    // a path that no longer exists.
    saveWorktreeState(null)
    return
  }

  setCwd(worktreeSession.worktreePath)
  setOriginalCwd(getCwd())
  // projectRoot is intentionally NOT set here. The transcript doesn't record
  // whether the worktree was entered via --worktree (which sets projectRoot)
  // or EnterWorktreeTool (which doesn't). Leaving projectRoot stable matches
  // EnterWorktreeTool's behavior — skills/history stay anchored to the
  // original project.
  restoreWorktreeSession(worktreeSession)
  // The /resume slash command calls this mid-session after caches have been
  // populated against the old cwd. Cheap no-ops for the CLI-flag path
  // (caches aren't populated yet there).
  clearMemoryFileCaches()
  clearSystemPromptSections()
  getPlansDirectory.cache.clear?.()
}

/**
 * Undo restoreWorktreeForResume before a mid-session /resume switches to