Coffee launches quiet Markdown editor for Mac

Coffee’s strongest idea is not the sums; it is making AI-assisted notes auditable without sacrificing file ownership.

• –Plain Markdown files remain portable across editors, Git repositories, and automation workflows.
• –Inline calculations, math, and Mermaid rendering turn notes into practical working documents without polluting the source files.
• –Line-by-line review of AI changes provides a useful safety layer for Claude, Cursor, and other file-editing tools.
• –Local search, on-device AI, and an MCP server make the app relevant to privacy-conscious AI workflows.
• –Mac-only availability and paid pricing put it in direct competition with Obsidian, Typora, iA Writer, and a growing field of native Markdown editors.