ux-performance
Installation
SKILL.md
Make useful, responsive state arrive sooner. Optimize the measured critical path, not suspicious-looking code. Default to client web; follow evidence to backend/delivery only when it delays the journey.
Contract
Name before edits:
- Journey: route/action, start state, data volume, device/network, cache state, and worst credible load.
- Milestone: visible outcome plus correctness/accessibility guardrails.
- Primary metric: elapsed time or resource bound for that milestone.
- Worthwhile delta: fixed before edits; repeatable 100 ms can matter, noise does not.
- Endpoint: audit (read-only), optimize (verified local changes), or calibrated CI guard.