Sheet 00 / Arcwright / AI coding editor for Windows, macOS and Linux

The AI editor that asks first.

Arcwright is a desktop code editor with four ways to work with AI. Every edit arrives as a diff. Every agent action is checked by the app, not the model, and written to a log. One shortcut stops the agent dead.

Download for Windows v1.0.3 Start free, 5 minutes of AI Watch a session

01 / One session, drawn to scale

Watch it build the thing it just drew.

Phase 1 of 6: Blueprint

Illustrative session. Scroll to drive it.

api-service

Explorer

api-service
lib
auth.ts
limiter.ts
routes
login.ts
test
login.test.ts
package.json

1import { Router } from 'express';

+import { createLimiter } from '../lib/limiter';

2import { checkPassword } from '../lib/auth';

4const router = Router();

+const limiter = createLimiter(5, 60_000);

6router.post('/login', async (req, res) => {

+ if (!limiter(req.ip ?? 'x')) return res.status(429).end();

7 const ok = await checkPassword(req.body);

− res.status(ok ? 200 : 401).end();

+ res.status(ok ? 200 : 401).json({ ok });

8});

Agent Forge

READ routes/login.ts ok

Forge asks: create lib/limiter.tsDenyAllow

WRITE lib/limiter.ts +10

Forge asks: edit routes/login.tsDenyAllow

EDIT routes/login.ts +4 −1

WRITE test/login.test.ts +18

RUN npm test running

Done. 3 files changed, 4 tests pass. Halt is Ctrl Alt Shift H.

Terminal

FORGE Tokens 0 Cost $0.0000 Free time 5:00

A short animation: an AI agent in Arcwright's Forge mode reads a route, asks permission, writes a rate limiter, edits the login route as a diff, writes a test and runs it. Four tests pass.

02Four modes1 / 4

Ask, Forge, Blueprint and Sketch

Ask

Alt + 1

Chat about your code. The open file and your selection are attached automatically.

limiter.tsSelection attached

export function createLimiter(max, windowMs) {
  const hits = new Map();
  return function allow(key, now = Date.now()) {
    const recent = (hits.get(key) || []).filter((t) => now - t < windowMs);
    if (recent.length >= max) return false;
    recent.push(now);
    return true;

Forge activityasks first

READ src/routes/login.ts allowed
SEARCH "checkPassword" allowed
ASK delete src/old-auth.ts DenyAllow
DENIED by you. Nothing was deleted.
RUN npm test allowed

Halt: Ctrl Alt Shift H stops it at once.

Blueprint: add login rate limit4 tasks

Create lib/limiter.ts +10
Guard POST /login +4 −1
Add tests +18

Apply 3 tasks Undo all

Applied as one step. Undone as one step.

Pricing.tsxCtrl + J

export function Pricing() {
  return (
  > 
  );

+<section className="tiers">

+ <Tier name="Hobby" price="0" />

+ <Tier name="Team" price="15" featured />

+ <Tier name="Scale" price="49" />

+</section>

Accept Reject

03Signature featuresIn the web editor and the desktop app

Rewind it. Meter it. Show it.

Three things that make AI-written code safe to trust: a timeline you can walk backwards, a meter that never lets the bill surprise you, and a link that replays exactly how it was built.

01 / Time-travel rewind

Slide back to any moment.

Every AI change saves a checkpoint with the prompt that caused it. Drag the slider to preview the diff, then restore the whole project or a single file. A rewind is itself a checkpoint, so it can be undone too.

02 / Live cost meter

Watch the spend as it happens.

Tokens and credits for every request and every session, taken from Arcwright’s own usage data. Set a monthly budget: a warning at 80%, a hard stop at the cap, and a chart on your dashboard.

03 / Shareable replays

Show how it was built.

Share a private-by-default link that replays the build step by step, with animated typing and file changes. Secrets are removed automatically. Set an expiry, switch privacy, revoke any time, or list it in the gallery.

Try it free Watch shared replays

04What the app enforcesNot suggestions to the model

The model proposes. The app decides.

Permission: Forge asks before it acts by default. The check runs in the app, outside the model's reach, on every action it takes.
Record: Each action is written to an activity log you can read afterwards.
Stop: Ctrl Alt Shift H halts the agent immediately.
Undo: Sketch applies as one undoable edit. Blueprint applies in one step and has Undo all.
Secrets: Keys are stored by the main process, encrypted with DPAPI, Keychain or libsecret. Never in config.json. Never sent to the interface.
Hosted key: On Arcwright Cloud the provider key exists only on the server. Your app holds a short-lived token tied to your device.

05Backends and costPick under the chat box

Pay once, pay us, or pay nobody.

Switch backend any time. The editor, modes and diffs behave the same on all three.

A
Your own key
Hundreds of models, billed by your AI provider. Arcwright never sees the money.
B
Arcwright Cloud
5 minutes of hosted AI free, once. Pro is $15 a month with 1,500,000 tokens a day on included models.
C
Local models
Free and offline. Models unload after two minutes idle in light mode.

Open a file.
Ask it something.

Create a free account Read the pricing