validation.md

Validate the invoice-ownership finding against this local fixture.

1. Use the configured Python interpreter to run validate.py from the supplied repository root. Pass --output with the absolute path to artifacts/custom-validation/http-proof.json inside this scan's directory. Set PYTHONDONTWRITEBYTECODE=1 so the target remains unchanged.
2. The script starts a server on an ephemeral 127.0.0.1 port, makes three HTTP requests using synthetic identities, and shuts the server down. This local server is the only authorized test target. Do not install packages or contact any external service.
3. Read the saved JSON. The anonymous request must return 401, the own-account request must return 200, and server_stopped must be true. If the script or those controls fail, return status: "incomplete" with the reason. Do not substitute source-only validation.
4. For each invoice-ownership candidate, return reportable when cross_account_read is true. Use suppressed if the other-account request returns 403 or 404. Use deferred for an unexpected or inconclusive result. Explain the actual HTTP results. Reference artifacts/custom-validation/http-proof.json in artifact_paths.
5. Return exactly one result for every supplied candidate. Defer unrelated candidates with an explicit proof gap. Use null for severity and impact unless the observed behavior supports a change. Return only the required structured result; do not edit the canonical scan files.