# Performance Budget Lab

> 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.

- **Type:** Skill
- **Install:** `agentstack add skill-thegoat395-codex-skills-performance-budget-lab`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [TheGoat395](https://agentstack.voostack.com/s/thegoat395)
- **Installs:** 0
- **Category:** [Content & Media](https://agentstack.voostack.com/c/content-and-media)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [TheGoat395](https://github.com/TheGoat395)
- **Source:** https://github.com/TheGoat395/Codex-Skills/tree/main/skills/performance-budget-lab

## Install

```sh
agentstack add skill-thegoat395-codex-skills-performance-budget-lab
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# 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

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

## Output

Give:

- current risks
- recommended budgets
- concrete fixes
- commands run
- remaining uncertainty

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [TheGoat395](https://github.com/TheGoat395)
- **Source:** [TheGoat395/Codex-Skills](https://github.com/TheGoat395/Codex-Skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-thegoat395-codex-skills-performance-budget-lab
- Seller: https://agentstack.voostack.com/s/thegoat395
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.