no-pre-existing-failures

name	no-pre-existing-failures
description	Test accountability policy. All failures belong to the current changeset. Commits must include test results. No failures on main.
user-invocable	false

1. Every test failure is caused by your changes. There are no "pre-existing," "known," "flaky," or "unrelated" failures. If a test fails, you broke it. Fix it before proceeding.

2. Every git commit must include a test summary. On main, all tests must pass — no exceptions. On branches, failures are permitted only if explicitly noted in the commit message with the failure name and reason.