web-performance SKILL.md skillB
web-performance from ziniman/ai-instruct is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ziniman/ai-instruct/web-performance@git:20260502.4621eeaPins git:20260502.4621eea in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ziniman/ai-instruct
- Path
skills/web-performance/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260502.4621eea, committed May 2, 2026
- First version recorded
- Apr 20, 2026
- Size
- 55,395 bytes
- Repository stars
- 29
- License
- Apache-2.0
Use this skill whenever the user is improving Core Web Vitals or page load performance, or mentions slow pages, PageSpeed Insights / Lighthouse failures, LCP/CLS/INP scores, bundle size, image/font optimization, or third-party script impact. Covers Core Web Vitals, image and font optimization, JavaScript bundle size, CSS build size, CDN caching, third-party JavaScript impact, and measurement tools. Skip for backend latency tuning, database query optimization, or CI build speed.
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
# Web Performance Guide > Applies to: Any website or web app | Updated: March 2026 A practical reference for measuring and improving web performance - covering Core Web Vitals, image and font optimization, JavaScript bundle size, CSS build size, CDN caching, third-party JavaScript impact, and validation tools. --- ## Section 0: Before You Start Answer these questions before making any performance changes. Each has a default - use it if the user hasn't said otherwise. **Q: Which pages are the priority targets?** (landing page, dashboard, auth-gated app pages, all pages) Default: public-facing pages first - these are indexed by search engines and directly affect user experience. Auth-gated pages matter less for Core Web Vitals field data because CrUX only collects data from logged-in users on those routes. **Q: What is the current performance baseline?** Default: unknown - run PageSpeed Insights on the target URL before making any changes, so you have a before/after comparison. Note the LCP element type (image or text), TTFB, and the specific audits flagged as failing. **Q: Are you optimizing for lab scores (Lighthouse) or field data (real users)?** …
Read the whole file at its exact version.
How to install
mdr add ziniman/ai-instruct/web-performance@sha256:7ab7c83ed441dda1The line at the top of this page pins the label git:20260502.4621eea, 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_vmaq6rxzz4vfh5h7)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Apr 20, 2026 and May 2, 2026, about one every 12 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260502.4621eea latest | 2026-05-02 | 4621eea | 55,395 B | B | view · diff |
| git:20260420.0a6f905 | 2026-04-20 | 0a6f905 | 43,672 B | B | view |
Audit of the latest version
- 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 (55395 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
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
ziniman/ai-instruct · 29 stars · license Apache-2.0 · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vmaq6rxzz4vfh5h7 GET https://markdownregistry.com/api/v1/resolve?ref=ziniman/ai-instruct/web-performance GET https://markdownregistry.com/api/v1/blob/7ab7c83ed441dda100dde955d13ce52ec1639cf3f5e6e18f08e275d66135dfe8
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.
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