critical-images SKILL.md skillA
critical-images from thedaviddias/front-end-checklist is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add thedaviddias/front-end-checklist/critical-images@git:20261004.4b0ddb9Pins git:20261004.4b0ddb9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- thedaviddias/front-end-checklist
- Path
skills/critical-images/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261004.4b0ddb9, committed Oct 4, 2026
- First version recorded
- May 29, 2026
- Size
- 1,567 bytes
- Repository stars
- 74,516
- License
- MIT
Use when reviewing image assets, markup, and CDN or build transforms related to Prioritize loading critical images. Check encoded size, rendered size, loading strategy, and above-the-fold impact together.
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
# Prioritize loading critical images The Largest Contentful Paint (LCP) is often an image—prioritizing its load can improve LCP by 20-40%, directly impacting Core Web Vitals and SEO. ## Quick Reference - Use fetchpriority='high' on LCP images - Preload hero images in document head - Remove loading='lazy' from above-the-fold images - Critical images directly impact LCP Core Web Vital ## Check Identify which images are critical for initial render and ensure they load with high priority. ## Fix Add fetchpriority='high' to critical images and use preload for hero images. ## Explain Explain how prioritizing critical images improves Largest Contentful Paint (LCP). ## Code Review Review image assets, markup, and delivery configuration related to Prioritize loading critical images. Flag exact files or components where format choice, sizing, or loading behavior violates the rule, and describe how to confirm the fix in DevTools. --- For full implementation details, code examples, and framework-specific guidance, see `references/rule.md`. Rule page: https://frontendchecklist.io/rules/images/critical-images
Read the whole file at its exact version.
How to install
mdr add thedaviddias/front-end-checklist/critical-images@sha256:433ff9058fa03a34The line at the top of this page pins the label git:20261004.4b0ddb9, 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_6kaq4xauc76spuix)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 29, 2026 and Oct 4, 2026, about one every 128 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261004.4b0ddb9 latest | 2026-10-04 | 4b0ddb9 | 1,567 B | A | view · diff |
| git:20260529.7c05904 | 2026-05-29 | 7c05904 | 1,573 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 (1567 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
thedaviddias/front-end-checklist · 74,516 stars · license MIT · pushed 2026-10-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6kaq4xauc76spuix GET https://markdownregistry.com/api/v1/resolve?ref=thedaviddias/front-end-checklist/critical-images GET https://markdownregistry.com/api/v1/blob/433ff9058fa03a34f89735f2f257a43fe315d611c4235aed662babe16eaddece
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.