- Added ACP (Agent Client Protocol) mode for headless agent operation via --mode acp flag.
- Integrated Agent Client Protocol SDK with session management, streaming communication, and event mapping.
- Added ensureOnDisk() method to SessionManager for immediate session persistence without requiring assistant messages.
- Changed session persistence to use atomic file rewrite for unflushed sessions.
- Implemented AcpAgent class with session management, prompt handling, MCP server configuration, and event streaming.