performance-budget-lab SKILL.md skillA
performance-budget-lab from thegoat395/codex-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add thegoat395/codex-skills/performance-budget-lab@git:20260910.feff772Pins git:20260910.feff772 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- thegoat395/codex-skills
- Path
skills/performance-budget-lab/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260910.feff772, committed Sep 10, 2026
- First version recorded
- Jun 21, 2026
- Size
- 1,999 bytes
- Repository stars
- 137
- License
- MIT
Set performance budgets before implementation.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Performance Budget Lab Use this skill to keep visually rich sites fast. Own the budget and acceptance policy. Route measured runtime diagnosis, implementation fixes, and React/Next performance work to `$performance-audit-websites`. ## 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. Define route, hardware/device, network/cache state and measurement method. 4. Run Lighthouse or browser performance checks when feasible. 5. Check Core Web Vitals (LCP, CLS, INP) and supporting diagnostics such as TTFB; choose metrics that measure the budgeted user experience. 6. Set media/JavaScript/font budgets from the intended experience and baseline evidence. 7. Prefer CSS and Motion for small interactions; reserve GSAP/R3F/video for clear value. …
Read the whole file at its exact version.
How to install
mdr add thegoat395/codex-skills/performance-budget-lab@sha256:ca9f39993fa69cf7The line at the top of this page pins the label git:20260910.feff772, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_mdmcxljou5keysni)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jun 21, 2026 and Sep 10, 2026, about one every 41 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260910.feff772 latest | 2026-09-10 | feff772 | 1,999 B | A | view · diff |
| git:20260905.f7824ba | 2026-09-05 | f7824ba | 1,912 B | A | view · diff |
| git:20260621.2caaecc | 2026-06-21 | 2caaecc | 1,274 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1999 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
thegoat395/codex-skills · 137 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mdmcxljou5keysni GET https://markdownregistry.com/api/v1/resolve?ref=thegoat395/codex-skills/performance-budget-lab GET https://markdownregistry.com/api/v1/blob/ca9f39993fa69cf770453192ab6eb9d0397a749753dac3cadc578249f618f57e
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.