frontend-performance SKILL.md skillA
frontend-performance from ssheleg/sheleg-dev is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ssheleg/sheleg-dev/frontend-performance@git:20261020.6a7c3e1Pins git:20261020.6a7c3e1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ssheleg/sheleg-dev
- Path
plugins/sheleg-dev/skills/frontend-performance/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261020.6a7c3e1, committed Oct 20, 2026
- First version recorded
- Aug 11, 2026
- Size
- 14,575 bytes
- Repository stars
- 4
- License
- MIT
Use when building or auditing web pages for speed: Core Web Vitals (LCP, INP, CLS), Lighthouse and PageSpeed scores, render-blocking resources, bundle size, fonts and caching. Not for visual design (sheleg-design) or conversion work. Opt out: no wiring, без обвязки. Triggers - "PageSpeed", "Lighthouse", "Core Web Vitals", "bundle size", "performance budget", "ускорить сайт", "медленно грузится", "вес бандла".
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 Optimize frontend applications for maximum Lighthouse scores and real-user performance. This skill covers the technical performance layer -- for how it looks, see `sheleg-design`; for what the interface must do, see `super-ux`. ## Audit Workflow 1. **Measure** -- Run PageSpeed Insights or Lighthouse (Chromium) and load the same scenario in WebKit first (see *Test browser* below). Record scores, failing audits and the engine of each number. 2. **Diagnose** -- Map each failing audit to a specific code-level cause (see checklist below). 3. **Prioritize** -- Fix by impact: P0 blocks rendering, P1 hurts metrics, P2 is informational. 4. **Implement** -- Apply fixes per the reference guides. 5. **Validate** -- `next build` (or framework equivalent) + re-run Lighthouse and the WebKit run. Verify no regressions in either engine. ## Test browser — WebKit (Safari) first Load and profile the page in **WebKit first**: Safari through `safaridriver` (WebDriver; `sudo safaridriver --enable` once) for a real browser, Playwright's `webkit` (the `webkit` project, `--browser webkit`, installed with `npx playwright install webkit`) for scripted runs and traces, Safari Web …
Read the whole file at its exact version.
How to install
mdr add ssheleg/sheleg-dev/frontend-performance@sha256:2092fefd26d1ea1dThe line at the top of this page pins the label git:20261020.6a7c3e1, 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_c72budlujqp6ssid)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Aug 11, 2026 and Oct 20, 2026, about one every 12 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.6a7c3e1 latest | 2026-10-20 | 6a7c3e1 | 14,575 B | A | view · diff |
| git:20261016.6628387 | 2026-10-16 | 6628387 | 14,870 B | A | view · diff |
| git:20260914.ca2da3a | 2026-09-14 | ca2da3a | 13,349 B | A | view · diff |
| git:20260909.ebab4a1 | 2026-09-09 | ebab4a1 | 12,781 B | A | view · diff |
| git:20260906.e7d6e89 | 2026-09-06 | e7d6e89 | 10,087 B | A | view · diff |
| git:20260816.1aad9a0 | 2026-08-16 | 1aad9a0 | 10,074 B | A | view · diff |
| git:20260811.e3d6210 | 2026-08-11 | e3d6210 | 8,967 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 (14575 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
ssheleg/sheleg-dev · 4 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_c72budlujqp6ssid GET https://markdownregistry.com/api/v1/resolve?ref=ssheleg/sheleg-dev/frontend-performance GET https://markdownregistry.com/api/v1/blob/2092fefd26d1ea1daeb4d632d01aa1aaaa3c1df47a91239ac63ce3fa8a91b5e8
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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