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Text Rendering Legibility

SHOULD

SHOULD: Apply `text-rendering: optimizeLegibility` to enable kerning and ligatures, most visible at heading sizes.

Apply text-rendering: optimizeLegibility for proper kerning and ligatures

Bad

Good

Why it matters

The optimizeLegibility value enables kerning and optional ligatures, improving the visual quality of text, especially at larger font sizes. This is particularly noticeable in letter pairs like AV, WA, and Ty where default spacing can look uneven.

References

Built by Gleb Stroganov, design engineer at Evil Martians.

The rules come from other people's skills and guidelines — Vercel, Rauno Freiberg, @Ibelick, impeccable, Emil Kowalski, Tailwind, RAMS — each one credited on the Sources page. The work here is extraction and wiring: every rule is pulled into one corpus, given a good and a bad example you can operate, a MUST/SHOULD/NEVER rule an agent can paste, and a link back to where it came from.