harn

Scaffold a complete harness for the current project — AGENTS.md, hooks, guardrails. Use when starting a new project or hardening an existing one. Triggers: /harn:init, 'set up harness', 'scaffold guardrails', 'create AGENTS.md'

Build or rebuild AGENTS.md with progressive disclosure. Use when: /harn:agents-md, 'create AGENTS.md', 'update agent instructions', 'too many instructions'

Audit project harness against the CAR framework. Use when: /harn:analyze, 'audit harness', 'check CAR', 'harness health', 'how good is my harness'

Scaffold resume artifacts (LEARNED.md, CHECKPOINT.json) for long-running sessions. Triggers: /harn:checkpoint, 'resume artifacts', 'checkpoint', 'session recovery', 'LEARNED.md'

Generate context monitoring and backpressure hooks. Triggers: /harn:context, 'context monitoring', 'backpressure', 'context budget', 'attention budget', 'context rot'

Generate or update the quality gate Stop hook. Use when: /harn:quality-gate, 'set up type checking', 'add quality gate', 'stop hook'

Generate or update security guardrail hooks. Use when: /harn:guard, 'update security rules', 'block dangerous commands', 'add guardrail'

Generate PostToolUse trace logging hook for observability. Triggers: /harn:trace, 'trace logging', 'observable hooks', 'agent trace', 'JSONL logging'

Generate PostToolUse auto-formatter hook. Triggers: /harn:format, 'auto format', 'formatter hook', 'PostToolUse formatter'

Generate MCP server health check for SessionStart. Triggers: /harn:mcp-check, 'MCP health', 'check MCP servers', 'validate MCP'