The first lifecycle
Software delivery
Git is the substrate: versioning, sync, access control, and an audit trail for free. A session protocol every terminal inherits keeps parallel workstreams in sync. Model tiering puts a frontier model on the hard parts and cheap models on the rest. And hard gates stand before anything ships: a secret-scan, author-review, permissions pass on every AI-authored commit, adversarial review across different model families, and observability that watches what happened instead of asking. Vibe-code to the eighty percent. Engineer the last twenty.