frontend-performance SKILL.md skillA
frontend-performance from martinolivero/saas-builder is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add martinolivero/saas-builder/frontend-performance@git:20260606.1d02dd6Pins git:20260606.1d02dd6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- martinolivero/saas-builder
- Path
skills/frontend-performance/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260606.1d02dd6, committed Jun 6, 2026
- Size
- 3,717 bytes
- Repository stars
- 4
- License
- MIT
This skill should be used when a frontend feels slow, fails Core Web Vitals, has a large bundle, or needs performance optimization. Trigger phrases include "make it faster", "improve performance", "Core Web Vitals", "LCP", "INP", "CLS", "reduce bundle size", "code splitting", "lazy load", "it's slow to load", "optimize images", "bundle too big", "Lighthouse score". It targets the real Core Web Vitals thresholds with stack-specific fixes for React + Vite + Vercel.
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 This skill makes a React + Vite app hit the Core Web Vitals bar — the same metrics Google uses for ranking and that users feel as "fast." It optimizes against real thresholds, not vibes. Analogy: shipping a fast app is like packing for a flight. You don't drag every possession to the gate — you pack the carry-on with what's needed now (above-the-fold) and check the rest (lazy-load below-the-fold). Overpacking the initial bundle is what makes the page heavy. ## The targets (field data, 75th percentile) - **LCP < 2.5s** — largest content paint. - **INP < 200ms** — interaction to next paint (replaced FID in March 2024). - **CLS < 0.1** — cumulative layout shift. ## Discovery (max 3 questions, only if unknown) 1. What's slow — first load (LCP/bundle) or interactions (INP)? 2. Do you have field data (real users) or only a Lighthouse lab score? 3. What's the biggest payload — JS bundle, images, or fonts? ## Step 1 — Measure real users first …
Read the whole file at its exact version.
How to install
mdr add martinolivero/saas-builder/frontend-performance@sha256:8501548b9eaa549eThe line at the top of this page pins the label git:20260606.1d02dd6, 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_gf6p5cpytwtllr5g)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 6, 2026.
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 (3717 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
martinolivero/saas-builder · 4 stars · license MIT · pushed 2026-10-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gf6p5cpytwtllr5g GET https://markdownregistry.com/api/v1/resolve?ref=martinolivero/saas-builder/frontend-performance GET https://markdownregistry.com/api/v1/blob/8501548b9eaa549e98444e9f29fd2095f6e50d36d4ab74d9d11125226bcc2bd8
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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