PostHog Self-driving wrote 6,000+ pull requests in its first month that 600+ companies chose to merge. We showed the signal-to-PR pipeline at AI Engineer in London this April, and released it in late June. I'll show what happened since: where agents overreached, what we threw away, what's still science fiction, and the jump from fixing bugs to building features. The system now pitches features backed by your product data, builds them, and reviews them paranoidly, testing like a real customer. All open source. Real PRs, real reviews, real failures, shown live.