dembrandt/dembrandt-skills · skills/performance-and-web-vitals/SKILL.md

performance-and-web-vitals skillB

performance-and-web-vitals is agent-read markdown (skill) from dembrandt/dembrandt-skills: Audit UI performance with Lighthouse and fix Core Web Vitals — LCP, CLS, INP. Fast UI is good UX. Use when optimising page load, fixing layout shift, reducing input delay, improving Lighthouse scores, or reviewing images, fonts, and render-blocking resources..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add dembrandt/dembrandt-skills/performance-and-web-vitals@git:20260419.3cf6904
Exact content
mdr add dembrandt/dembrandt-skills/performance-and-web-vitals@sha256:fa2639206dee6aeb

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_jl5p4gokly2mg7zz.svg)](https://markdownregistry.com/a/art_jl5p4gokly2mg7zz)

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Versions

versioncommittedcommitsizeaudit
git:20260419.3cf6904 latest2026-04-19 3cf6904 8,118 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8118 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

Source

GitHub

dembrandt/dembrandt-skills · 54 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_jl5p4gokly2mg7zz
GET https://markdownregistry.com/api/v1/resolve?ref=dembrandt/dembrandt-skills/performance-and-web-vitals
GET https://markdownregistry.com/api/v1/blob/fa2639206dee6aeb90fcfa42f7718618c0bfc32bd6cbc86b2079a69bbfe06050

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.