Imported from siliconjungle/-shapeshift-labs-evidence-kit (skills/benchmark-guardian/SKILL.md). Install upstream with npx skills add siliconjungle/-shapeshift-labs-evidence-kit --skill benchmark-guardian. Copyright stays with the author.

Benchmark Guardian

Do not make performance claims from intuition.

Workflow

1. State the benchmark hypothesis:

   • target behavior,
   • metric,
   • fixture,
   • command,
   • acceptance threshold or baseline.

2. Prefer focused benchmarks while iterating:

npx evidence-kit add-benchmark --name core --language js
npm run bench:evidence

3. Write structured JSON to benchmarks/results/*latest.json.

4. Run correctness tests or fuzzers for the same path before saying a performance change is safe.

5. Update evidence docs:

npm run docs:perf
npm run docs:perf:search -- <benchmark topic>

Result Rules

• Keep timeout, error, unsupported, and bad-result rows visible.
• Report exact command and output file.
• Report fixture-level rows, not only aggregate scores.
• If benchmark scope changed, run npm run bench:scope or npx evidence-kit scope.
• If the benchmark came from external research, cite the fetch manifest and source note path.

Final Response

Include the command, output path, key rows, and caveats such as dirty worktree, missing baseline, or local machine noise.