performance SKILL.md skillA
performance from plugin87/ux-ui-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add plugin87/ux-ui-agent-skills/performance@git:20261006.5751441Pins git:20261006.5751441 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- plugin87/ux-ui-agent-skills
- Path
.claude/skills/performance/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261006.5751441, committed Oct 6, 2026
- First version recorded
- Jun 8, 2026
- Size
- 2,186 bytes
- Repository stars
- 3,070
- License
- MIT
Optimize UI performance against Core Web Vitals — LCP, INP, CLS — with loading/code-split strategy, layout-shift prevention, and animation performance rules. Use when the user wants to improve speed, fix jank or layout shift, hit Web Vitals budgets, or make a UI feel fast on low-end devices.
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
# Skill: Performance
> **Step 0 — is the kit here?** This skill reads files from the kit. Check once:
> `ls ${CLAUDE_SKILL_DIR}/../../../tokens >/dev/null 2>&1 && echo KIT_OK || echo KIT_MISSING`
> On `KIT_MISSING` only the skill folders were installed, which is what
> `npx skills add` does. Say so plainly, point the user at
> `npx ux-ui-agent-skills init` or the plugin install, and stop. Do not guess the
> contents of a file you could not open.
Make the UI fast and stable. Treat performance as an accessibility concern — slow/janky UIs fail low-end devices first.
## Steps
1. Read `${CLAUDE_SKILL_DIR}/../../../workflows/performance.md` (Core Web Vitals targets, loading strategy, layout-shift, animation perf, design-system runtime cost).
2. Diagnose against budgets: **LCP ≤ 2.5s**, **INP ≤ 200ms**, **CLS ≤ 0.1**. Measure on a mid-tier mobile profile (throttle slow 4G + 4× CPU).
3. Loading: render above-fold first (SSR/Server Components), code-split by route + heavy widget, lazy-load below-fold/behind-interaction (Astro islands / Qwik), preload one critical font weight, modern responsive images.
…Read the whole file at its exact version.
How to install
mdr add plugin87/ux-ui-agent-skills/performance@sha256:3712c4433065cd9aThe line at the top of this page pins the label git:20261006.5751441, 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_2xvfdr37kjvgioum)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jun 8, 2026 and Oct 6, 2026, about one every 60 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261006.5751441 latest | 2026-10-06 | 5751441 | 2,186 B | A | view · diff |
| git:20260824.db721b3 | 2026-08-24 | db721b3 | 1,685 B | A | view · diff |
| git:20260608.e166524 | 2026-06-08 | e166524 | 1,667 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 (2186 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
plugin87/ux-ui-agent-skills · 3,070 stars · license MIT · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2xvfdr37kjvgioum GET https://markdownregistry.com/api/v1/resolve?ref=plugin87/ux-ui-agent-skills/performance GET https://markdownregistry.com/api/v1/blob/3712c4433065cd9ac32ecb13990ac1e1202fd4f1c11597099580ac8fb03a4be6
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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