Run a constrained worker
Read the execution contract before starting. Validate the final receipt with its parameterized verification.argv, replacing {python}, {skill_dir}, and {receipt} with concrete local values.
Declare the worker's one job, allowed inputs, exact write scope, timeout, maximum output, retry budget, and receipt schema before starting it. Default to read-only and no recursive delegation.
Capture the returned status and raw evidence. A timeout, invalid receipt, or
unavailable tool is a failure or UNVERIFIED, never a successful empty result.
Retry only when the mechanism is understood and the same authority still
applies. Isolate a failed worker so other receipts remain valid.