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Agent skill

HTML Resource Hints

by thedaviddias in thedaviddias/Front-End-Checklist

A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Add resource hints (preload, prefetch, dns-prefetch).

MITAuto-check passed

Install HTML Resource Hints

skills CLI
$ npx skills add thedaviddias/Front-End-Checklist --skill html-resource-hints -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install thedaviddias/Front-End-Checklist html-resource-hints --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/html-resource-hints .claude/skills/html-resource-hints && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
html-resource-hints
GitHub stars
74k
Token cost
~526 tokens
SKILL.md length
220 words
Files
2 (incl. references)
Skills in repo
390
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Add resource hints (preload, prefetch, dns-prefetch).

  • Reviewing templates
  • SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Shared components related to Add resource hints (preload

What it does

HTML Resource Hints is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing templates, rendered HTML, or shared components related to Add resource hints (preload, prefetch, dns-prefetch). Validate the final browser-facing markup, not just the source framework abstraction.

Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).

The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.

When your agent uses it

  • Reviewing templates
  • Shared components related to Add resource hints (preload

Example prompts

  • “/html-resource-hints”

What it can do on your machine

Read from SKILL.md and the folder at commit e8d14d0. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • frontendchecklist.io

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

HTML Resource Hints loads about 526 tokens when it runs, and up to ~1.6k if it reads all its reference files. Until then it costs about 59 tokens; SKILL.md has 220 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~59
When it runs · the whole SKILL.md, loaded when a task matches
~526
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 220 words, ~526 tokens.

Download SKILL.mdSave it as .claude/skills/html-resource-hints/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
html-resource-hints
description
Use when reviewing templates, rendered HTML, or shared components related to Add resource hints (preload, prefetch, dns-prefetch). Validate the final browser-facing markup, not just the source framework abstraction.
metadata.category
html
metadata.priority
high
metadata.difficulty
intermediate
metadata.estimatedTime
20
metadata.source
frontendchecklist.io
metadata.url
https://frontendchecklist.io/en/rules/html/html-resource-hints

Add resource hints (preload, prefetch, dns-prefetch)

The browser's HTML parser discovers resources sequentially — a font referenced in a CSS file won't be fetched until the CSS is parsed. Resource hints break this dependency chain, allowing the browser to start fetching critical resources in parallel with parsing. A single preload directive for a critical font can eliminate a 100–300ms Flash of Invisible Text.

Quick Reference

  • preload forces immediate download of resources needed by the current page
  • prefetch fetches resources likely needed for the next navigation (low priority)
  • dns-prefetch resolves DNS for third-party origins in advance
  • preconnect does DNS + TCP + TLS for origins you'll connect to soon

Check

Look at this HTML file for late-discovered critical resources — fonts referenced in CSS, hero images, and key scripts. Identify where preload or preconnect hints would help.

Fix

Add appropriate preload hints for critical fonts, images, and scripts. Add preconnect for third-party domains used early in the page.

Explain

Explain each resource hint type (preload, prefetch, preconnect, dns-prefetch), when to use each, and the consequences of misusing them.

Code Review

Review templates, server-rendered HTML, and shared components that output markup related to Add resource hints (preload, prefetch, dns-prefetch). Flag exact elements, attributes, and routes where the rendered HTML violates the rule.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/html/html-resource-hints

© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/html-resource-hints of thedaviddias/Front-End-Checklist.

  • SKILL.md
  • references/rule.md

Open the folder on GitHubat commit e8d14d0

Compare with similar skills

HTML Resource Hints next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

HTML Resource Hints compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
HTML Resource Hints this skillthedaviddias/Front-End-Checklist74k—~526Automated safety check: PassMIT
RenderLeoYeAI/openclaw-master-skills2.2k—~4.8kAutomated safety check: PassMIT
Agent Resource Allocatorruvnet/ruflo74k2 repos~4.9kAutomated safety check: PassMIT
Resourceswindmill-labs/windmill18k—~1.7kAutomated safety check: PassCustom licence
Markdown Renderingsickn33/agentic-awesome-skills47k1 repos~751Automated safety check: PassMIT
Get Available ResourcesK-Dense-AI/scientific-agent-skills48k1 repos~2.9kAutomated safety check: PassMIT

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Questions about HTML Resource Hints

What does HTML Resource Hints do?

A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Add resource hints (preload, prefetch, dns-prefetch). HTML Resource Hints is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing templates, rendered HTML, or shared components related to Add resource hints (preload, prefetch, dns-prefetch).

When should I use HTML Resource Hints?

HTML Resource Hints fits situations like: reviewing templates; shared components related to Add resource hints (preload.

How do I install HTML Resource Hints in Claude Code?

Run `npx skills add thedaviddias/Front-End-Checklist --skill html-resource-hints -a claude-code`. Or copy the skill folder (skills/html-resource-hints in thedaviddias/Front-End-Checklist) into .claude/skills/html-resource-hints in your project. Claude Code loads it when a task matches its description.

How do I install HTML Resource Hints in Codex?

Run `npx skills add thedaviddias/Front-End-Checklist --skill html-resource-hints -a codex`. Or copy the skill folder (skills/html-resource-hints in thedaviddias/Front-End-Checklist) into .agents/skills/html-resource-hints in your project. Codex loads it when a task matches its description.

Can I use HTML Resource Hints in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add thedaviddias/Front-End-Checklist --skill html-resource-hints -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/html-resource-hints, .gemini/skills/html-resource-hints, .github/skills/html-resource-hints and .opencode/skills/html-resource-hints in your project.

What does HTML Resource Hints need to run?

SKILL.md names no scripts, command-line tools or credentials: HTML Resource Hints is instructions for the agent only.

Does HTML Resource Hints access the network?

SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.

Is HTML Resource Hints safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does HTML Resource Hints use?

HTML Resource Hints is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does HTML Resource Hints use?

About 526 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.1k tokens, read only when the agent opens those files.

What are the alternatives to HTML Resource Hints?

Skills that share tags, products or a category with HTML Resource Hints: Render (LeoYeAI/openclaw-master-skills, 2.2k stars), Agent Resource Allocator (ruvnet/ruflo, 74k stars), Resources (windmill-labs/windmill, 18k stars) and Markdown Rendering (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains HTML Resource Hints?

thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,398 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.

Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.