performance-optimization SKILL.md skillA
performance-optimization from addyosmani/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add addyosmani/agent-skills/performance-optimization@git:20261023.ee3e850Pins git:20261023.ee3e850 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- addyosmani/agent-skills
- Path
skills/performance-optimization/SKILL.md- Versions recorded
- 9
- Latest version
- git:20261023.ee3e850, committed Oct 23, 2026
- First version recorded
- Jul 14, 2026
- Size
- 16,783 bytes
- Repository stars
- 113,383
- License
- MIT
Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.
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 ## Overview Measure before optimizing. Performance work without measurement is guessing — and guessing leads to premature optimization that adds complexity without improving what matters. Profile first, identify the actual bottleneck, fix it, measure again. Optimize only what measurements prove matters. ## When to Use - Performance requirements exist in the spec (load time budgets, response time SLAs) - Users or monitoring report slow behavior - Core Web Vitals scores are below thresholds - You suspect a change introduced a regression - Building features that handle large datasets or high traffic **When NOT to use:** Don't optimize before you have evidence of a problem. Premature optimization adds complexity that costs more than the performance it gains. ## Core Web Vitals Targets | Metric | Good | Needs Improvement | Poor | |--------|------|-------------------|------| | **LCP** (Largest Contentful Paint) | ≤ 2.5s | ≤ 4.0s | > 4.0s | | **INP** (Interaction to Next Paint) | ≤ 200ms | ≤ 500ms | > 500ms | | **CLS** (Cumulative Layout Shift) | ≤ 0.1 | ≤ 0.25 | > 0.25 | ## The Optimization Workflow ``` 1. MEASURE → Establish baseline with real data …
Read the whole file at its exact version.
How to install
mdr add addyosmani/agent-skills/performance-optimization@sha256:82af71540457cf85The line at the top of this page pins the label git:20261023.ee3e850, 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_t6o6x7trcglih5ug)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 9 versions of this file, between Jul 14, 2026 and Oct 23, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261023.ee3e850 latest | 2026-10-23 | ee3e850 | 16,783 B | A | view · diff |
| git:20261011.35c3acb | 2026-10-11 | 35c3acb | 16,698 B | A | view · diff |
| git:20261003.b67408f | 2026-10-03 | b67408f | 16,678 B | A | view · diff |
| git:20260918.cacf40d | 2026-09-18 | cacf40d | 16,392 B | A | view · diff |
| git:20260828.6a268d7 | 2026-08-28 | 6a268d7 | 21,717 B | A | view · diff |
| git:20260827.bfc9e32 | 2026-08-27 | bfc9e32 | 20,893 B | A | view · diff |
| git:20260827.0ce0107 | 2026-08-27 | 0ce0107 | 20,757 B | A | view · diff |
| git:20260807.91d4d07 | 2026-08-07 | 91d4d07 | 15,145 B | A | view · diff |
| git:20260714.6119908 | 2026-07-14 | 6119908 | 15,139 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 (16783 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
addyosmani/agent-skills · 113,383 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_t6o6x7trcglih5ug GET https://markdownregistry.com/api/v1/resolve?ref=addyosmani/agent-skills/performance-optimization GET https://markdownregistry.com/api/v1/blob/82af71540457cf853893685211f64509cd1e781c0de09d0186f16960f2d6eeba
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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