Benchmark Checklist skill: what it does and how to install it

What it does. Sets out checks before a benchmark, including reviewing the measurement script and machine load, identifying bottlenecks, matching production settings, checking errors and confirming work occurred in the timed region. It recommends alternating repeated runs, comparing results with realistic end-to-end performance, and reporting a verdict with the measurement range and limiter.

When to use it. When producing or assessing a performance number, such as a before-and-after result, regression claim, tuning run or choice between configurations. For a quick ballpark, it still requires checks for errors and completed work, and the report should say it is based on one run.