Mission uses artifacts to make intent durable before execution begins.

Artifact Purpose
BRIEF.md Why the Mission exists
PRD.md What must be true for the change to matter
SPEC.md How the change will be built
PLAN.md Which Mission tasks execute the spec
VERIFICATION.md What proves the work is correct
AUDIT.md What remains risky before delivery

The point is not more documents. The point is a smaller command surface for agents: each task receives bounded instructions, relevant artifacts, and a clear gate.

When a gate fails, the Mission does not pretend the agent is done. The operator sees the evidence and decides the next command.