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Brooks-Lint — Test Quality Review — measured AI agent skill | DecimalAI

hyhmrright/brooks-test

NewSkillScoreMaintained

Test quality review drawing on twelve classic engineering books — with primary focus on xUnit Test Patterns, The Art of Unit Testing, How Google Tests Software, and Working Effectively with Legacy Code — that diagnoses structural problems in an existing test suite: brittleness, mock abuse, coverage illusions, slow execution, poor readability. Triggers when: user asks about test quality, shares test files for review, or expresses frustration: "tests keep breaking whenever I change anything", "our

Testingby hyhmrright

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

QA & Test Engineering pack

decimalai skills pull hyhmrright-brooks-test

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/hyhmrright-brooks-test/SKILL.md

Raw file: /s/hyhmrright-brooks-test/SKILL.md ↗ · machine-readable summary at /s/hyhmrright-brooks-test.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 58m ago

—-25% tokens0% turns41% of whole cases pass with skill (9/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-08	✗→✓	▲ Improved	-33%	0%
case-07	✗→✓	▲ Improved	62%	0%
case-13	✗→✓	▲ Improved	-52%	0%
case-14	✗→✓	▲ Improved	-65%	0%
case-19	✗→✓	▲ Improved	1342%	0%

Showing 5 of 22 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

hyhmrright / brooks-lint

skills/brooks-test/SKILL.md

View on GitHub ↗

License MITImported 8/10/2026Version v2

Skill contents

SKILL.md

Brooks-Lint — Test Quality Review

Setup

Read in order:

../_shared/common.md — Iron Law, Project Config, Report Template, Health Score
../_shared/source-coverage.md — book coverage, exceptions, tradeoffs
../_shared/test-decay-risks.md — test-space symptom definitions and sources
test-guide.md (this directory) — the test quality review framework

Process

Scope: if the user did not share test files or point to a test directory, apply Auto Scope Detection (../_shared/common.md) first.

Build the test suite map (guide's "Before You Start" section)
Scan for each test decay risk in the order specified (Steps 1–4 of the guide)
Apply the Iron Law and output using the Report Template (Step 5 of the guide)

Mode line in report: Test Quality Review

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Other measured skills in the registry, with their headline benchmark lift.