extend

Add one new capability to an existing ALBA setup — skill, hook, rule, slash command or MCP integration — interactively, then wire it into CLAUDE.md and settings.json. Use when user says "add a skill", "add a hook", "I want a rule for X", "connect Trello/Gmail/Linear", "extend my agent", "can ALBA also do X". Do NOT use for first-time setup (use /setup). If the user already knows they want a skill, /create-skill goes…