software-engineering
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.