Onboarding

This generates an ONBOARDING.md file at your repo root by crawling the codebase and reconstructing how it works without you having to explain it. It's built for teams that ship code faster than they write docs, whether through AI assistance or just moving quickly. The output follows six sections (sometimes five) that answer what a new contributor actually needs in their first hour: architecture diagrams, structured tables, concrete file paths. It always regenerates from scratch and overwrites any existing version, so it stays current with the code rather than drifting. The "show don't tell" principle and the rule against inferring design rationale keep it grounded in what's observable rather than speculative.