Agents edit. You review the diff. Nothing lands without you.
Download for macOS - Website - Lix - Discord
Flashtype is a WYSIWYG markdown editor with Claude Code and Codex built in. Point it at a folder, open the .md files you already have, and run coding agents against the same files from a real terminal beside your document.
When an agent edits, Flashtype shows the change as an inline diff with word-level precision. Accept or reject each change before it lands, browse document history, and restore earlier versions when you need to.
| Feature | Description |
|---|---|
| Local markdown files | Open .md and .markdown files from your disk. No imports, sync step, or duplicate document format. |
| Claude & Codex terminal | Run CLI agents next to the document they are editing, with no copy-paste round trip. |
| Inline diffs | Review agent edits in the editor and accept or reject changes before they land. |
| Version history | Every edit becomes a checkpoint you can inspect and restore. |
| Markdown as source of truth | Keep lossless markdown that works with GitHub, ChatGPT, Discord, docs, and plain text tools. |
| Lix-powered version control | Built on the Lix SDK, an embeddable version control system for app-level history, branches, diffs, and change proposals. |
Download Flashtype for macOS at flashtype.com.
git clone https://github.com/opral/flashtype.git
cd flashtype
pnpm install
pnpm run devUseful commands:
| Command | Description |
|---|---|
pnpm run dev |
Start the Electron app with the Vite renderer. |
pnpm run dev:web |
Start the browser version. |
pnpm run build |
Build the app. |
pnpm test |
Run unit tests. |
pnpm run test:e2e |
Run Playwright end-to-end tests. |
pnpm run typecheck |
Check TypeScript. |
pnpm run lint |
Run oxlint. |
The marketing site lives in website.
Flashtype is also a real-world showcase for Lix: version control embedded directly into an application instead of bolted on outside it.
| Lix capability | How Flashtype uses it |
|---|---|
| History | Track every document edit and restore earlier versions. |
| Branches | Let agents work in isolated branches before changes are accepted. |
| Diffs | Show granular inline accept/reject UI for markdown changes. |
| Change proposals | Keep humans in control of what lands. |
| Filesystem backend | Persist desktop documents as real files in a Lix-backed workspace. |
Flashtype is released under the MIT License.