remark-lint-maximum-heading-length

remark-lint rule to warn when headings are too long. Current stable version is 4.1.1 (ESM-only, requires Node.js 16+). Part of the unified/remark ecosystem, this rule enforces a maximum heading length (default 60 characters) and is included in some presets like remark-preset-lint-markdown-style-guide. Provides an optional stringLength function for custom text measurement (e.g., to count display width). Active development with regular releases coordinated across the remark-lint monorepo.