optimize-performance SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
optimize-performance from velimirmueller/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add velimirmueller/claude-skills/optimize-performance@git:20261009.0ae007bPins git:20261009.0ae007b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- velimirmueller/claude-skills
- Path
skills/frontend/optimize-performance/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261009.0ae007b, committed Oct 9, 2026
- First version recorded
- Jun 8, 2026
- Size
- 6,592 bytes
- Repository stars
- 6
- License
- MIT
Use when tuning frontend performance — enables the React Compiler, splits code by route and lazy-loads heavy chunks, adds bundle analysis with a size budget, measures Core Web Vitals (LCP/INP/CLS) with web-vitals, and applies image/CLS best practices. Measure first, then optimize.
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
# Optimize Performance ## 1. Audit current state ```bash cat .claude/stack-profile.md 2>/dev/null || cat ~/.claude/stack-profile.md 2>/dev/null # frontend.framework, frontend.meta, package_manager grep -E '"(babel-plugin-react-compiler|rollup-plugin-visualizer|web-vitals)"' package.json 2>/dev/null grep -rn "React.lazy\|defineAsyncComponent\|loading=\"lazy\"" src/ 2>/dev/null | head ``` Read `frontend.framework` (step 3) and `frontend.meta`: `next` / `nuxt` have their own image, font and compiler options — use theirs, and treat steps 6–7 as the shared part. Commands use pnpm; translate for `package_manager`. **Prerequisites:** `scaffold-frontend-project` (Vite) and ideally `set-up-routing` (route-level splitting). **Rule zero: measure before optimizing** — wire the analyzer + vitals (steps 6–7) before hand-tuning anything. ## 2. Decide what to do - Greenfield → enable Compiler + splitting + measurement (steps 4–8). - Slow app → measure first (6–7), then attack the biggest chunk / worst vital. ## 3. Detect framework …
Read the whole file at its exact version.
How to install
mdr add velimirmueller/claude-skills/optimize-performance@sha256:1b04f33c8818a3f6The line at the top of this page pins the label git:20261009.0ae007b, 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_dklzufgqzd22mmuu)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jun 8, 2026 and Oct 9, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.0ae007b latest | 2026-10-09 | 0ae007b | 6,592 B | A | view · diff |
| git:20261009.f174ce3 | 2026-10-09 | f174ce3 | 5,241 B | A | view · diff |
| git:20261009.9c46bfe | 2026-10-09 | 9c46bfe | 5,219 B | A | view · diff |
| git:20260610.985f7fa | 2026-06-10 | 985f7fa | 4,688 B | A | view · diff |
| git:20260608.8cf5ea0 | 2026-06-08 | 8cf5ea0 | 4,494 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 (6592 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
velimirmueller/claude-skills · 6 stars · license MIT · pushed 2026-10-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dklzufgqzd22mmuu GET https://markdownregistry.com/api/v1/resolve?ref=velimirmueller/claude-skills/optimize-performance GET https://markdownregistry.com/api/v1/blob/1b04f33c8818a3f66088eb49bb48c887d98671e58427e786d14848ae8aa6b539
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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