remark-lint-no-file-name-irregular-characters

A remark-lint rule that warns when Markdown file names contain characters outside a configurable allowed set (default: alphanumeric, dash, dot). Current stable version is 3.0.1. It is part of the unified/remark ecosystem, maintained by the remark organization, and follows semantic versioning. Key differentiator: allows custom regex patterns to define which characters are irregular, enabling project-specific naming conventions. Supports ESM only, Node.js 16+, and TypeScript types.