frontend-performance-audit SKILL.md skillB
frontend-performance-audit from jpantsjoha/ai-native-developer-experience is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jpantsjoha/ai-native-developer-experience/frontend-performance-audit@git:20260914.0883cffPins git:20260914.0883cff in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jpantsjoha/ai-native-developer-experience
- Path
skills/frontend-performance-audit/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260914.0883cff, committed Sep 14, 2026
- Size
- 10,705 bytes
- Repository stars
- 13
- License
- Apache-2.0
Measure real frontend performance — Core Web Vitals (LCP, CLS, INP), page-load traces, CPU and network throttling, Lighthouse accessibility/SEO scores, and heap growth — using chrome-devtools-mcp against a live browser. Trigger when asked "is the page fast enough", "measure Core Web Vitals", "why is this route slow", "run Lighthouse", "check for a memory leak", before any performance-gated certification (Built for Shopify, Core Web Vitals thresholds, store listing review), and before any…
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
# Frontend Performance Audit > **Measure, don't estimate.** "The page feels fast" is not evidence. "LCP 3.1s at 4x CPU throttle, 2.2s of it server response time" is evidence. This skill wires `chrome-devtools-mcp` as the **measurement instrument** in a browser toolkit that already has drivers. It exists because functional browser automation and performance measurement are different jobs, and the tools that do the first one well do not do the second one at all. ## The problem this solves Most agent harnesses accumulate two or three browser tools that all click, screenshot, and read the DOM. None of them measure. So performance work falls back to one of two bad options: 1. **Field data** (Chrome UX Report, a partner/vendor analytics dashboard, RUM). Accurate but lagging — typically a 28-day rolling 75th percentile. You cannot use it to test a fix you made this morning. 2. **A public URL scanner** (PageSpeed Insights, Lighthouse CI against a deployed URL). Fast, but it can only reach pages that are publicly reachable and unauthenticated. …
Read the whole file at its exact version.
How to install
mdr add jpantsjoha/ai-native-developer-experience/frontend-performance-audit@sha256:ebe44f74ef1135e2The line at the top of this page pins the label git:20260914.0883cff, 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_ocwluk6tdripjonj)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 14, 2026.
Audit of the latest version
- fail: No link to a raw IP address (matched: http://127.0.0.1:9222)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10705 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 script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
jpantsjoha/ai-native-developer-experience · 13 stars · license Apache-2.0 · pushed 2026-10-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ocwluk6tdripjonj GET https://markdownregistry.com/api/v1/resolve?ref=jpantsjoha/ai-native-developer-experience/frontend-performance-audit GET https://markdownregistry.com/api/v1/blob/ebe44f74ef1135e21de51e304c219284ee4651adc4ea9a7503be08ed12ba2a1e
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.