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Your ideas. Multiple agents.
One fast workflow.

Download for Windows
Use it with your preferred LLM
ClaudeOpenAIGemini

One IDE for all your agents.

FileSettings
2localhost:3000
.gitignoreactions.tshero.tsx
testsrccomponentssectionshero.tsx
1import { IdeMock } from "../ide-mock";
2import { ButtonLink } from "@/components/ui/button";
3
4export function Hero() {
5  return (
6    <section className="relative">
7      <h1 className="text-display-xl">
8        Your ideas. Multiple agents.
9      </h1>
10    </section>
11  );
12}
TypeScript React12 linesUTF-8
TerminalRunnpm run dev · Running
▲ Next.js 16.4.2 (Turbopack)
- Local: http://localhost:3000
✓ Ready in 1.4s

Lead your team of agents.

Give each agent a role and let them work side by side. You stay in charge, they do the heavy lifting.

  • Prime

    Builds the interface: components, pages and styles, straight from your design.

  • Nova

    Writes the APIs, data models and tests that keep everything behind the UI solid.

  • Atlas

    Takes care of builds, CI and deployment, so the work actually ships.

  • Echo

    Designs the schema, writes the migrations and keeps queries fast as the data grows.

One workspace. Multiple agents.

Bring the AI you already use, run several agents in parallel, and keep the final say on everything they do.

Bring the AI you already use.

FAST runs the real coding agents right inside your workspace. Pick one per agent, and they all work side by side.

  • Claude Code
  • Codex
  • Gemini CLI

Every agent on its own branch.

Each agent codes in its own Git worktree, so they all run in parallel without overwriting each other. You don't need to know Git.

Nothing lands without you.

FAST collects each agent's work and merges it into your app, only once you've read the diff and said yes.

Your agents. Your rules.

  • AgentsPoint them at any task; each gets its own isolated space.
  • Configurable modelsPick the right model per agent depending on the job.
  • Token & session trackingSee what every agent consumes, session by session.
Agents work for you, not the other way around. You decide their role, their model and their priority.

An IDE that stays an IDE.

AI should make development richer, not the interface heavier. FAST keeps the essentials sharp and adds agents where they help.

actions.tspage.tsx
1import { Button } from "@/ui/button";
2import { save } from "./actions";
3
4export default function Page() {
5  return (
6    <form action={save}>
7      <Button type="submit">Save</Button>
8    </form>
9  );
10}
Simple, fast code editor
Opens instantly, types without lag, gets out of your way.
Smooth project navigation
Jump between files, symbols and sessions from the keyboard.
AI chat built into the workflow
Ask, edit and review next to your code, not in another tab.
Custom commands
Turn repetitive tasks into a short command you trigger in a few words.

Questions, answered.

A minimalist IDE built for developers who think faster than they code. Run multiple AI agents in parallel from one workspace.

No. Secondary agents get their own isolated branch automatically, and FAST handles the worktrees for you. You just review the diff and merge.

FAST runs the real coding agents right inside your workspace: Claude Code, Codex and Gemini CLI. You keep the tools you already know, pick one per agent, and run several side by side.

FAST runs on Windows today. macOS support is coming soon.

Download the Windows installer from the latest GitHub release. macOS builds are coming soon.

Start building faster.

FAST is available now. Download the latest release and open your first project in a minute.

Download for Windows