Замер времени запуска Storybook

★ 7.6 · testing

storybook-startup-benchmark is a Claude Code skill that measures Storybook startup time from spawning `storybook dev` to the first story rendering in the browser. It tracks three distinct segments: `server` (spawn → server ready), `browser` (server ready → first story rendered), and `total`, using a preview-side render signal tied to `requestAnimationFrame`. The skill supports `--repeat N` for multiple runs, reporting average, min, max, and p95 per segment in human-readable form like `5.2s`. It is designed for developers investigating startup regressions, comparing Storybook versions, or evaluating feature flags — and includes interpretation heuristics to distinguish server-side build slowdowns from manager or preview render latency.