Method watch

src/index.ts:988–1010

* Start watching for file changes and auto-syncing. * * Uses native OS file events (FSEvents on macOS, inotify on Linux 19+, * ReadDirectoryChangesW on Windows) with debouncing to avoid thrashing. * * @param options - Watch options (debounce delay, callbacks) * @returns true if wat

(options: WatchOptions = {})

   * @returns true if watching started successfully
   */
  watch(options: WatchOptions = {}): boolean {
    if (this.watcher?.isActive()) return true;

    this.watcher = new FileWatcher(
      this.projectRoot,
      async (paths?: string[]) => {
        const result = await this.sync({ paths });
        // sync() returns this exact zero-shape iff it failed to acquire the
        // file lock (a real empty sync always has filesChecked > 0 because
        // scanDirectory ran). Surface that to the watcher as a typed error
        // so it keeps pendingFiles + reschedules instead of clearing them
        // (#449).
        if (result.filesChecked === 0 && result.durationMs === 0) {
          throw new LockUnavailableError();
        }
        const filesChanged = result.filesAdded + result.filesModified + result.filesRemoved;
        return { filesChanged, durationMs: result.durationMs };
      },
      options
    );

    return this.watcher.start();
  }

  /**
   * Stop watching for file changes.