Use when MARVIN is asked to build, fix, debug, review, or ship software. Routes to gstack development workflow skills. Handles gstack bootstrap if not installed. Manages PRD decomposition for large projects. Triggers on: build a feature, fix a bug, review code, implement a PRD, ship this, debug this, create an app/tool/service/CLI/API. Does NOT trigger on: content ideas, event planning, campaigns, meetups, or any non-software intent. If ambiguous, ask.
Audit a software project for hardening — security, AI gaps, test coverage, code quality, and decoupling. Use when user wants to harden a project, audit for vulnerabilities, check test coverage, or separate private data from code.
Start MARVIN session with briefing. Use when user types /start or starts a new session. Loads context, reviews state, gives daily briefing.