Use this when: a contract artifact (OpenAPI, GraphQL, protobuf, AsyncAPI, MCP manifests, or agent tool schemas) changes before merge, deploy, publish, or tool registration; AND any agent-executed operation with no supported contract type — send type agent_operation. Do not call for documentation-only changes, static readiness scoring, or receipt verification. Use analyze for risk only; authorize requires context.operation. Skipping this call is not permission. Absence of a key is not permission. Inputs: preflight_mode is required: "analyze" (risk only; no receipt, no execution_action) or "authorize" (may mint a receipt; requires context.operation — merge is not deploy is not publish). Supply exactly one artifact source: artifacts[] (1–20 items, each {id, type, before, after} as the FULL spec/schema text, not a path or URL; type is openapi|graphql|grpc|asyncapi|mcp_manifest|agent_tools|agent_operation) XOR derivation="server" (server reads GitHub Compare; needs context.repository + context.base + context.head; sending artifacts[] together is 400). Grant fields (include_execution_grant, grant_version, tenant_id, executor_id, adapter_id, target_uri, expected_state_token, state_nonce, policy_hash) apply only when preflight_mode="authorize" AND include_execution_grant=true; analyze ignores them. previous_receipt is a chain token base64url(body).base64url(signature) to LINK a prior decision — it does not re-verify; use coderifts.verify_receipt instead; for details of a past decision use coderifts.get_decision_details instead. idempotency_key replays authorize only (24h), never analyze.