performance-audit-websites SKILL.md skillA
performance-audit-websites 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-audit-websites@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-audit-websites/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260910.feff772, committed Sep 10, 2026
- First version recorded
- Jun 21, 2026
- Size
- 1,761 bytes
- Repository stars
- 137
- License
- MIT
Diagnose measured runtime and Core Web Vitals.
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 Audit Websites Use this skill to keep premium sites fast enough that visual ambition does not punish users. Measure first and optimize the dominant constraint; do not apply framework folklore as proof. Own measured diagnosis and implementation. Route pre-build numeric budgets, acceptance thresholds, and visual-richness policy to `$performance-budget-lab`. ## Workflow 1. Inspect the affected surface, relevant project scripts, target URL and available inspection tooling; reuse existing context. 2. Read [Performance Audit Websites Guide](references/performance-audit-websites-guide.md) before claiming the site is ready. For React or Next.js implementation work, also read [React and Next.js performance](references/react-next-performance.md). 3. Record a reproducible baseline and identify the dominant request, rendering, interaction or layout-shift cost. When optimization is authorized, change the measured bottleneck and compare under matched build/device/cache conditions. 4. Fix issues when they are in scope; otherwise record exact evidence and remaining risk. 5. Summarize commands, URLs, screenshots/checks, changed files, and what was not tested. …
Read the whole file at its exact version.
How to install
mdr add thegoat395/codex-skills/performance-audit-websites@sha256:741808294de1cd84The 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_rdeoqgezxzrt7ggz)
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 | 1,761 B | A | view · diff |
| git:20260905.f7824ba | 2026-09-05 | f7824ba | 1,677 B | A | view · diff |
| git:20260621.2caaecc | 2026-06-21 | 2caaecc | 2,297 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 (1761 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_rdeoqgezxzrt7ggz GET https://markdownregistry.com/api/v1/resolve?ref=thegoat395/codex-skills/performance-audit-websites GET https://markdownregistry.com/api/v1/blob/741808294de1cd84e9f7ae9e021caeaa682efcdd9320b8d28ea8fb44f0c77dea
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.