https://yaroslav.io/posts/inkmark-fast-ai-first-markdown

Written in Rust. CommonMark+GFM conformant. Features include: strong security by default and host/protocol whitelists for links and images, syntax highlighting, frontmatter, ToC, plain text export, structured extraction of headings/images/links/code, statistics with char/word count and language detection, emoji shortcodes.

AI features include: two chunking primitives: heading-based with breadcrumbs and per-chunk char/word counts, and sliding-window with overlap for size-bounded chunks; block-aware or word-aware truncation for context-window budgeting; Markdown-to-Markdown pipeline.