A native macOS reader and editor for the markdown already on your disk. Point ML-42 at any folder — a git repo, a docs directory, an Obsidian vault — and read, search, and edit across projects. No import, no database; files stay where they are. Cmd+K searches every project at once. When an AI agent rewrites a file, ML-42 reloads it in place. On-device summaries via Apple Intelligence. Sandboxed — no network, no telemetry. $12.99, buy once. Mac, no subscription.