Reach the product path
Feature proof starts at the integration point that owns the user-facing affordance, not an isolated leaf.
Baton is a lightweight protocol for AI-assisted engineering: plan the work, implement one slice, write proof from live repo state, then verify in a fresh context that never saw the implementer's framing.
Baton turns agent work into durable artefacts instead of transcript folklore. The handoff between roles is a file on disk: spec, status, proof. The verifier reads those artefacts in a sealed context and fails closed unless the evidence is complete.
Feature proof starts at the integration point that owns the user-facing affordance, not an isolated leaf.
Completion claims require files changed, test output, reachability artefacts, and explicit non-delivery.
The verifier starts with no inherited transcript and returns only PASS, FAIL, or BLOCKED.
Baton artefacts use resolvable schema URLs. This site hosts the public contract while the source of truth remains the open protocol repo.