performance-optimization SKILL.md skillA
performance-optimization from rampstackco/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rampstackco/claude-skills/performance-optimization@git:20260810.e5bc675Pins git:20260810.e5bc675 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rampstackco/claude-skills
- Path
skills/performance-optimization/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260810.e5bc675, committed Aug 10, 2026
- First version recorded
- Apr 28, 2026
- Size
- 10,763 bytes
- Repository stars
- 1,037
- License
- MIT
Diagnose and fix web performance issues including Core Web Vitals (LCP, INP, CLS), bundle size, asset optimization, render performance, and runtime efficiency. Use this skill whenever the user wants to improve page speed, fix Core Web Vitals, optimize assets, reduce bundle size, debug slow renders, or systematically improve a site's performance. Triggers on performance, page speed, Core Web Vitals, LCP, INP, CLS, FID, TTFB, bundle size, code splitting, image optimization, lazy loading, render…
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
# Performance Optimization Diagnose web performance issues and produce a remediation plan. Stack-agnostic. Anchored to Core Web Vitals and standard browser performance patterns. This skill goes deeper than the performance checks in `qa-testing` and `seo-technical`. Use this when performance itself is the goal. --- ## When to use - Fixing Core Web Vitals (LCP, INP, CLS) - Diagnosing slow page loads - Reducing JavaScript bundle size - Optimizing images, fonts, and other assets - Fixing layout shift, render-blocking resources, jank - Pre-launch performance verification - Annual performance health check ## When NOT to use - General QA after deploys (use `qa-testing`) - Technical SEO including indexing and crawling (use `seo-technical`) - Code review for general bugs (use `code-review-web`) --- ## Required inputs - The site or page under audit - Specific performance complaints if any - Target metrics (Core Web Vitals thresholds, Lighthouse score, custom) - Browser dev tools access - Performance monitoring data if available (Real User Monitoring, lab data) --- ## The framework: Core Web Vitals Three metrics carry most of the weight for both user experience and SEO: …
Read the whole file at its exact version.
How to install
mdr add rampstackco/claude-skills/performance-optimization@sha256:896161a06b87cd83The line at the top of this page pins the label git:20260810.e5bc675, 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_up2wwy5vcgoxyyqj)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 28, 2026 and Aug 10, 2026, about one every 26 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260810.e5bc675 latest | 2026-08-10 | e5bc675 | 10,763 B | A | view · diff |
| git:20260507.ac2b078 | 2026-05-07 | ac2b078 | 10,240 B | A | view · diff |
| git:20260505.c80b896 | 2026-05-05 | c80b896 | 10,129 B | A | view · diff |
| git:20260429.c2be03d | 2026-04-29 | c2be03d | 10,015 B | A | view · diff |
| git:20260428.f066ffe | 2026-04-28 | f066ffe | 9,892 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 (10763 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
rampstackco/claude-skills · 1,037 stars · license MIT · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_up2wwy5vcgoxyyqj GET https://markdownregistry.com/api/v1/resolve?ref=rampstackco/claude-skills/performance-optimization GET https://markdownregistry.com/api/v1/blob/896161a06b87cd83566bb4302c2154b3ed57ef4b3bba027f86cfed17c807f325
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.
More from rampstackco/claude-skills
Every file in rampstackco/claude-skills