DoorDash Uses Multi Agent LLMs to Clean up 60,000 Feature Flags

Feature flag debt is close to the perfect agent task: tedious, well scoped, endlessly repeated. DoorDash carries 60,000+ flags across roughly 623 repos and adds about 2,300 a month, so they pointed a multi-agent setup at it — Sonnet orchestrating, Opus agents working in isolated git worktrees. 50 stale flags produced 45 usable PRs, 31 merged first pass, at 13.8 minutes and $4.79 each versus 1-2 hours by hand.