Method delete

src/node/utils/sessionFile.ts:96–110

* Delete JSON file from workspace session directory with file locking. * Idempotent - no error if file doesn't exist.

(workspaceId: string)

   * Idempotent - no error if file doesn't exist.
   */
  async delete(workspaceId: string): Promise<Result<void>> {
    return this.fileLocks.withLock(workspaceId, async () => {
      try {
        const filePath = this.getFilePath(workspaceId);
        await fs.unlink(filePath);
        return Ok(undefined);
      } catch (error) {
        if (error && typeof error === "object" && "code" in error && error.code === "ENOENT") {
          return Ok(undefined); // Already deleted
        }
        const message = getErrorMessage(error);
        return Err(`Failed to delete ${this.fileName}: ${message}`);
      }
    });
  }
}