This is an Obsidian plugin that provides a highly configurable markdown linter and formatter. It implements over 50 individual rules organized by type (YAML, headings, content, spacing, footnotes, paste) using a clean rule-builder pattern with decorators. The plugin integrates deeply with the Obsidian editor, supporting lint-on-save, paste transformations, custom commands, regex replacements, and a comprehensive settings UI with tabs and search. It includes an extensive test suite (unit and integration) and auto-generates documentation from rule definitions. The architecture is modular: each rule is a self-registering class with typed options, examples, and option builders that also drive the settings UI. Shared utilities for YAML manipulation, markdown AST transformations, and ignore-type masking are well-isolated and reusable. The codebase is actively maintained with frequent commits and responsive issue triage.