d-padmanabhan/agent-engineering-handbook · skills/web-perf/SKILL.md

web-perf skillA

web-perf is agent-read markdown (skill) from d-padmanabhan/agent-engineering-handbook: Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge..

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 d-padmanabhan/agent-engineering-handbook/web-perf@git:20260825.bf1c995
Exact content
mdr add d-padmanabhan/agent-engineering-handbook/web-perf@sha256:11a1c3fc83804213

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_fl25qdv2nny7jcwa.svg)](https://markdownregistry.com/a/art_fl25qdv2nny7jcwa)

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Versions

versioncommittedcommitsizeaudit
git:20260825.bf1c995 latest2026-08-25 bf1c995 8,203 BA view · diff
git:20260824.a4195912026-08-24 a419591 8,199 BA view · diff
git:20260601.8111c352026-06-01 8111c35 8,207 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8203 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

GitHub

d-padmanabhan/agent-engineering-handbook · 17 stars · license MIT · pushed 2026-09-12 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_fl25qdv2nny7jcwa
GET https://markdownregistry.com/api/v1/resolve?ref=d-padmanabhan/agent-engineering-handbook/web-perf
GET https://markdownregistry.com/api/v1/blob/11a1c3fc83804213c3ab1b212b11ab0e7dafdb37efc6b13ebab7c710fe862c85

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