1. Open it — no Xcode needed
Claude and Codex spit out markdown files. Double-click one on a Mac and it wants to install Xcode (10 GB). FlashType just opens it like a normal app.
What happens in the demo
A markdown file Claude made, opened like a normal app, edited by Claude Code beside it — and every change reviewed before it lands.
2. Claude Code, right beside your doc
Run Claude Code or Codex next to your draft. Ask for a change — like adding a stop to a trip plan — and it edits the real file, not a copy in a chat window.
3. Review it as a diff
Every edit shows up as an inline diff. Accept the good ones, reject the rest. You see exactly what the AI changed before it lands.
Where FlashType is headed
FlashType started as a demo for Lix: bringing version control — accept, reject, and history — to everyone who works with AI-generated files, not just engineers.
Not just markdown files
The same 'how do I open this?' problem hits CSV, JSON, and LaTeX too. FlashType is built to open and diff those next.
The terminal is on its way out
Right now FlashType shows the native Claude Code terminal. Soon, non-technical users won't need a terminal at all.
Diffs your whole team gets
Developers call them diffs; lawyers call them redlines. FlashType makes AI changes reviewable for people who've never opened VS Code.
Version control beyond code
FlashType is a demo of Lix — version control for any file — bringing accept, reject, and history to knowledge work.
Review-first beats paste-first
Pasting into a chat tab gives you text with no diff and no history. FlashType puts the agents where your files already live — and nothing lands until you approve it.
| Capability | FlashType | Chat in a browser tab | Wiki / Confluence AI |
|---|---|---|---|
| Works on your real local .md files | — | — | |
| Claude Code & Codex inside the editor | — | — | |
| Agent edits shown as inline diffs | — | — | |
| Accept or reject each change | — | — | |
| Automatic version history & audit trail | — | Some | |
| Opens without Xcode or VS Code | — | ||
| Free & open source | — | — |
Free & open source
Built in the open. Issues, pull requests and stars welcome.
macOS · MIT license