Method compact

src/proxy/mailbox/store.js:556–588

()

  // --- Compaction (reduces JSONL file size by rewriting only current state) ---

  compact() {
    // Round-7 (§20.5): same per-PID tmp rationale as _persistState.
    // Two concurrent compact() calls (daemon + ad-hoc CLI) racing on
    // the same `${messagesFile}.tmp` lose the loser's compacted log.
    const tmpFile = `${this._messagesFile}.${process.pid}.tmp`;
    const entries = [];
    for (const [, msg] of this._messages) {
      entries.push(msg);
    }
    entries.sort((a, b) => a.created_at - b.created_at);

    const lines = entries.map((msg) => jsonlLineForWrite(msg));

    const fd = fs.openSync(tmpFile, 'w', PRIVATE_FILE_MODE);
    try {
      for (const line of lines) {
        fs.writeSync(fd, line);
      }
    } finally {
      fs.closeSync(fd);
    }
    bestEffortChmod(tmpFile, PRIVATE_FILE_MODE);
    // Windows: renameSync throws EPERM when the destination already exists.
    // Remove it first so the swap succeeds on all platforms.
    if (process.platform === 'win32') {
      try { fs.unlinkSync(this._messagesFile); } catch (e) {
        if (e.code !== 'ENOENT') throw e;
      }
    }
    fs.renameSync(tmpFile, this._messagesFile);
    bestEffortChmod(this._messagesFile, PRIVATE_FILE_MODE);
    this._rebuildIndex();
  }

  close() {
    // no-op for JSONL (no file handles to close), but kept for API compatibility