Markuplint

Check current active GitHub Sponsors and sync README/website listings. Used for periodic checks and listing updates.

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Verify documentation claims (README, JSDoc) in spec-heavy packages — @markuplint/types (attribute value types; WHATWG/W3C/RFC/CSS/SVG grammars) and @markuplint/ml-spec (HTML/WAI-ARIA algorithms, spec resolution) — against the live web standards and the actual implementation. Use when auditing or updating README/JSDoc in these packages, or when a doc claim (spec URL, ABNF, numeric count, algorithm description) is suspected stale. Trigger keywords: verify docs, doc audit, spec citation check, ABNF check, README accuracy, JSDoc accuracy.

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Guides you through migrating markuplint configuration from v4 to v5. Detects current versions, reviews the migration guide, interactively confirms breaking changes and new rules with the user, updates config files and tests. For Claude Code.

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