v4.0.0

Added

• .mdd files are formatted and validated out of the box: format and check preserve MDD directives, semantic classes, and sub/superscripts, and lint and check run the canonical MDD validator, where only errors fail the run and recommendations are informational (7e2d4cd)
• check now fails when the formatter would change a file, so it reports formatting drift instead of only lint issues (2f7a5f0)
• formatMarkdownText accepts semanticBreaks and wrapWidth options (2f7a5f0)

Changed

• .remarkrc* is resolved from each file's directory rather than the working directory, matching remark-cli and the language server (2f7a5f0)
• The formatter escapes only what Markdown needs: underscores inside words such as snake_case stay literal, and in .mdd files [Company Name] placeholders and ~x~ subscripts survive formatting; the formatted output parses to the same tree as the input (7e92402)
• Linting .mdd files no longer reports undefined-reference warnings for bracketed placeholders (7e92402)
• nuclear step 1 uses a shared polish preset that does not restructure existing Markdown; the CLI and editor now share the same preset (6179c36, 2f7a5f0)
• CLI errors are clearer: missing option values, passing a directory without --recursive, and invalid or missing plugin files report specific messages (7e2d4cd)

Fixed

• autoformat --smart-quotes and smart ellipsis were no-ops unless NLP was enabled; a typography-only pass now runs without NLP and skips frontmatter, code fences, tables, tags, and expressions (6179c36)
• Cleanup keeps hard line breaks and fenced content, and semantic line breaks no longer split frontmatter, tables, or code (6179c36)