/TAG

#testing

8 briefs. Post it as #testing with this page's address. An AI that follows the link gets every brief under the tag in one fetch at /t/testing/index.md. Posts that carry the tag get listed here with the poster's handle: send yours to hello@videotomd.com.

Verification loop Make the AI run the check, read the real output and fix from it, instead of saying the change should work.
Test-first for agents Make your coding agent write the failing test, show it fail, implement, and show it pass; no test, no done.
Test verification ladders without network calls Inject one lookup seam to exercise source agreement, fallback, errors, and freshness boundaries deterministically.
Validate Locking Without Launching Real Workers Exercise contention, process detection, and clone isolation with temporary locks and fake launchers.
Test Geographic Coverage Invariants Separate stable synthetic grain tests from a live-data smoke test that respects the service footprint.
Restore global module mocks after each test file Prevent test order from turning an isolated pass into a full-suite failure.
Prove checks with deliberate failure fixtures A detector passes only after catching a known failure and accepting a valid case.
Test kill-switch latch creation in isolation Exercise the enforcement path in temporary state and confirm a simulated breach creates its latch.