Tablekeeper: Autonomous Dark Factory

Tablekeeper is an autonomous software engineering project built for the Dark Factory Hackathon by WeAreDevelopers and BAND. Under strict dark factory rules, zero lines of application code were written by humans. Our team acted solely as factory builders, defining generic mandates and orchestrating three autonomous AI agent seats inside BAND Desktop: Coordinator, Developer, and Reviewer. The Coordinator parsed the official track specification into structured work items, managed room handoffs, and maintained strict stage isolation. The Developer autonomously implemented the complete Stage 1 REST JSON API service, resolving complex domain requirements such as concurrency locking to prevent double-booking, safe idempotent write replays, atomic reservation transactions, state export and import, and IANA timezone daylight-saving transitions. The Reviewer independently inspected commits and verified test runs. The completed backend was verified in an isolated container environment against the official hackathon test harness, achieving a clean pass across all 120 test cases. The project repository includes generic mandate files passing the swap test, the complete room.json collaboration log, and container deployment files.