Function call

src/tools/ExitWorktreeTool/ExitWorktreeTool.ts:227–321

(input)

  renderToolUseMessage,
  renderToolResultMessage,
  async call(input) {
    const session = getCurrentWorktreeSession()
    if (!session) {
      // validateInput guards this, but the session is module-level mutable
      // state — defend against a race between validation and execution.
      throw new Error('Not in a worktree session')
    }

    // Capture before keepWorktree/cleanupWorktree null out currentWorktreeSession.
    const {
      originalCwd,
      worktreePath,
      worktreeBranch,
      tmuxSessionName,
      originalHeadCommit,
    } = session

    // --worktree startup calls setOriginalCwd(getCwd()) and
    // setProjectRoot(getCwd()) back-to-back right after setCwd(worktreePath)
    // (setup.ts:235/239), so both hold the same realpath'd value and BashTool
    // cd never touches either. Mid-session EnterWorktreeTool sets originalCwd
    // but NOT projectRoot. (Can't use getCwd() — BashTool mutates it on every
    // cd. Can't use session.worktreePath — it's join()'d, not realpath'd.)
    const projectRootIsWorktree = getProjectRoot() === getOriginalCwd()

    // Re-count at execution time for accurate analytics and output — the
    // worktree state at validateInput time may not match now. Null (git
    // failure) falls back to 0/0; safety gating already happened in
    // validateInput, so this only affects analytics + messaging.
    const { changedFiles, commits } = (await countWorktreeChanges(
      worktreePath,
      originalHeadCommit,
    )) ?? { changedFiles: 0, commits: 0 }

    if (input.action === 'keep') {
      await keepWorktree()
      restoreSessionToOriginalCwd(originalCwd, projectRootIsWorktree)

      logEvent('tengu_worktree_kept', {
        mid_session: true,
        commits,
        changed_files: changedFiles,
      })

      const tmuxNote = tmuxSessionName
        ? ` Tmux session ${tmuxSessionName} is still running; reattach with: tmux attach -t ${tmuxSessionName}`
        : ''
      return {
        data: {
          action: 'keep' as const,
          originalCwd,
          worktreePath,
          worktreeBranch,
          tmuxSessionName,
          message: `Exited worktree. Your work is preserved at ${worktreePath}${worktreeBranch ? ` on branch ${worktreeBranch}` : ''}. Session is now back in ${originalCwd}.${tmuxNote}`,
        },
      }
    }