[fv-superagent]

This is by an automated agent, not a human.

Problem: fastvideo/tests/contract/test_ci_test_collection.py checked coverage at directory granularity, so a new file beside a directory that a lane lists only in part stayed invisible to CI. fastvideo/tests/AGENTS.md already warns about this under "CI Wiring", and the second-pass audit traced the gap to tests/hooks, tests/audio, most of tests/layers and tests/distributed, and 16 MLX files: #2074 (comment).

Change: resolve what each CI pytest invocation collects (shell and YAML line continuations, quoted or exported variable assignments such as golden_root=./fastvideo/tests/..., both --ignore forms, -m "not gpu", and the files ssim/ci_runner.py globs at the ssim root, which is not recursive), then require every test_*.py under fastvideo/tests/ to be collected or listed in a shrink-only DARK_TESTS allowlist. The allowlist holds the 51 files that are dark today, each with a reason, including one gpu-only file the unit lane deselects with -m "not gpu"; test_dark_test_allowlist_stays_accurate fails when an entry is fixed or goes missing. The old directory-level ALLOWLIST and its two tests are replaced. Test-only.

Verification:

• python3 -m py_compile fastvideo/tests/contract/test_ci_test_collection.py: ok.
• pytest is not installed in this environment, so I ran the four tests directly with yaml stubbed: test_every_test_file_is_collected_or_allowlisted, test_dark_test_allowlist_stays_accurate, test_parser_handles_the_command_shapes_ci_uses (continuations, both --ignore forms, quoted and exported variables, word-bounded expansion, gpu-only files, a phantom $pytest_rc line and non-recursive SSIM discovery) and test_local_tests_stays_out_of_ci; all pass. The parser resolves 33 invocations, 508 test files and 51 allowlisted; the dark set equals the allowlist exactly, with no entry stale.
• Adding fastvideo/tests/hooks/test_zz_tmp_dark.py fails the guard and names that path; marking the collected fastvideo/tests/contract/test_env_policy.py dark fails the accuracy test.
• Buildkite on the prior head 1316cd77 ran the unit lane (which collects fastvideo/tests/contract/) green; the vae lane failed once on a pyxis enroot image-import error and passed on retry. The current head reruns all lanes.
• Could not run pre-commit run --files fastvideo/tests/contract/test_ci_test_collection.py: the hook cache path is read-only, and .pre-commit-config.yaml excludes fastvideo/tests/ anyway.

Risk: test-only. No runtime code, public API or CI config changes. The parser does not resolve a lane that selects tests through a shell glob or a generated list; such files look dark and need a name or an allowlist entry, which the docstring and failure message state. Marker handling is limited to -m "not gpu" with function- or module-level gpu markers. The unit lane's existing coverage is unchanged.

[mergify]

Merge Protections

🔴 1 of 1 protections blocking · waiting on 👀 reviews and 🤖 CI

	Protection	Waiting on
🔴	PR merge requirements	👀 reviews and 🤖 CI

🔴 PR merge requirements

Waiting for

• #approved-reviews-by>=1
• check-success=full-suite-passed

This rule is failing.

• #approved-reviews-by>=1
• check-success=full-suite-passed
• check-success=fastcheck-passed
• check-success~=pre-commit
• title~=(?i)^\[(feat|feature|bugfix|fix|refactor|perf|ci|doc|docs|misc|chore|kernel|new.?model|skill|skills|infra)\]

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; all previous findings are addressed and no new blocking issue was found.

Summary

This PR replaces directory-level CI coverage checks with file-level checks and an explicit DARK_TESTS list.

• The CI guard checks coverage for every test file.

_{Reviews (2) · Last reviewed commit: "[ci]: Match SSIM discovery and cover the..." · Reviewed by Greptile}