remark-lint-strikethrough-marker

remark-lint rule to enforce consistent GFM strikethrough markers (one tilde vs two). Current stable version is 3.0.1, ESM-only, requires Node.js 16+. Part of the remark-lint monorepo, ships TypeScript definitions. Unopinionated: default 'consistent' detects the first style and warns on deviations. Unlike general Markdown linting, this specifically targets the strikethrough marker count, a common source of inconsistency when using remark-gfm.