A developer named GRVYDEV just released Marky, a tiny markdown viewer built specifically for agentic coding workflows. It's a macOS app that does one thing well: you type `marky FILENAME` in your terminal and it opens a rendered view of that file. Under 15 MB. No Electron. Built on Tauri v2 with a Rust backend and React frontend.
The live reload is the key feature. As Claude or any other AI agent writes to a markdown file on disk, Marky updates instantly. When you're running an agent that generates plans or documentation, you want to see what it's producing without switching to an editor or browser tab. Similarly, Voxcode pairs local speech-to-text with ripgrep for AI coding workflows.
Why not just use VS Code's markdown preview? You could, but VS Code takes a beat to load and now you're in a full IDE when you just wanted to watch. Typora and MacDown exist but they're built for writing, not passive viewing. Marky is CLI-first and starts instantly. It stays out of your way.
Marky supports the rendering you'd expect. Shiki for syntax highlighting with VS Code themes. KaTeX for math. Mermaid for diagrams. It also has Obsidian-style folder workspaces and a command palette using nucleo, the same fuzzy matcher that powers the Helix editor. All HTML gets sanitized through DOMPurify, so pointing it at untrusted files is safe.
It's early. macOS ARM only right now, and the binary isn't signed while waiting on Apple developer review. The roadmap lists x86 and Linux support, plus built-in AI chat and git diff review. Installable via Homebrew or from source with Rust, Node.js, and pnpm. This tool exists because agentic workflows now exist: a purpose-built viewer for watching AI agents write documentation in real time, often facilitated by local models like Apfel.