Performance budget lab

Skill TheGoat395/Codex-Skills/skills/performance-budget-lab

Codex-first Agent Skills library for premium frontend, website, motion, accessibility, QA, and handoff workflows.

Install

npx -y skills add TheGoat395/Codex-Skills --skill performance-budget-lab

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

What its author says it does

Copied from the file, not written here

Use for website performance planning, Lighthouse/web-vitals checks, bundle/media/font budgets, Core Web Vitals triage, image/video optimization, animation performance, deployment readiness, and premium-site speed audits.

SKILL.md

1.2 KB, 219 tokens by cl100k_base, as published. Nobody here has run it

Performance Budget Lab

Use this skill to keep visually rich sites fast.

Budget Areas

JavaScript bundle size
route-level code splitting
image dimensions, formats, and lazy loading
video poster, preload, autoplay, and reduced-data behavior
font loading and fallback metrics
animation cost and scroll handlers
layout shift sources
server rendering/static rendering choices
caching and CDN behavior

Workflow

Identify stack and deployment target.
Inspect package dependencies and route structure.
Run available build/lint/test commands.
Run Lighthouse or browser performance checks when feasible.
Check Core Web Vitals risks: LCP, CLS, INP, TTFB.
Optimize media before adding more JS.
Prefer CSS and Motion for small interactions; reserve GSAP/R3F/video for clear value.
Report tradeoffs honestly when visual richness costs performance.

Output

Give: