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Optimize web font formats — measured AI agent skill | DecimalAI

thedaviddias/webfont-format

SkillScore100Maintained

Use when reviewing stylesheets, component styles, and responsive behavior related to Optimize web font formats. Check the rendered layout across breakpoints and interaction states before proposing a fix.

by thedaviddias

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

Frontend / UI pack

decimalai skills pull thedaviddias-webfont-format

Get this skill — curl · raw file

curl -fsSL https://app.decimal.ai/s/thedaviddias-webfont-format/SKILL.md

Raw file: /s/thedaviddias-webfont-format/SKILL.md ↗ · machine-readable summary at /s/thedaviddias-webfont-format.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 5h ago

Yes — +18% lift-8% tokens0% turns100% of whole cases pass with skill (22/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-01	✗→✓	▲ Improved	-24%	0%
case-12	✗→✓	▲ Improved	-45%	0%
case-13	✗→✓	▲ Improved	-11%	0%
case-17	✗→✓	▲ Improved	-11%	0%
case-02	✓→✓	＝ Same ✓	5%	0%

Showing 5 of 22 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

thedaviddias / front-end-checklist

skills/webfont-format/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1Bundled 1 file

Skill contents

references/

SKILL.md

Optimize web font formats

Modern font formats reduce file sizes by 30-50%—directly improving page load speed and Core Web Vitals scores.

Quick Reference

Use WOFF2 as primary format (~30% smaller than WOFF)
Include WOFF fallback for older browsers
Apply font-display: swap for better perceived performance
Preload critical fonts and subset to reduce file sizes

Check

Verify that web fonts use modern formats (WOFF2, WOFF) with proper fallbacks and are optimized for performance with font-display and preloading strategies.

Fix

Convert fonts to WOFF2/WOFF formats, implement proper font loading strategies, and optimize font delivery with compression and caching.

Explain

Explain how modern web font formats reduce file sizes, improve loading performance, and provide better browser support compared to legacy formats.

Code Review

Review stylesheets, component styles, and responsive states related to Optimize web font formats. Flag exact selectors, declarations, or breakpoints that violate the rule in the rendered UI.

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

Rule page: https://frontendchecklist.io/en/rules/css/webfont-format

Want to see if thedaviddias/webfont-format would activate on your phrasing? Try it before you install — no LLM call, no signup.

Other measured skills in the registry, with their headline benchmark lift.