Countersign
Live proof ledger Two receipts, the full diff, and the countersignature — read-only.

Flip the Switch Hackathon · Track 01

No agent
ships alone.

A countersignature for work done by agents.

A Switch room where agents propose a change, an independent verifier reproduces the failure and runs the proof, and a designated approver signs before anything lands. The verifier is deterministic Rust. The room keeps the record.