Cairn – Task tracker with no database; tasks are Markdown files in your repo

- **Cairn** is an open-source task tracker that stores tasks as plain Markdown files inside a project's Git repository, eliminating the need for a separate database. - It works locally via a CLI tool that scans Markdown files for special task markers and renders them as a simple web-based task board. - The target audience is developers who prefer file-based, Git-friendly workflows (e.g., markdown todo lists in a repo) and want a lightweight alternative to tools like Jira, Trello, or Notion. - Keeping tasks as Markdown files means they are version-controlled alongside code, easily editable in any text editor, and portable across systems without database migrations or cloud dependencies.