schema_version: agents_rule.v1
rule_id: HARNESS_CONTRACT_V1
title: Harness and validation contract
summary:
  - Harness output must be validated before it is trusted.
  - LLM must not override harness verdicts.
  - Source-of-truth precedence follows runtime manifest and schema contracts.
  - Live T+20 readiness cannot be faked from replay data.
