- Add parseSlashCommand() with regex-based parser for /cmd [args] format - Add CommandRegistry with local-only commands (help, stop, cost, status, clear) and gateway manifest support - Add short alias resolution: /n→new, /m→model, /t→thinking, /a→agent, /s→status, /h→help, /pref→preferences - Add executeHelp() and executeStatus() local command handlers - Extend Message.role union with 'system' for in-TUI system messages - Handle commands:manifest socket event to update registry from gateway - Wire InputBar to intercept /commands before sending to socket - Render system messages as dimmed ⚙ prefix without avatar chrome - Expose addSystemMessage() and socketRef from useSocket hook Co-Authored-By: Claude Sonnet 4.6 <[email protected]>