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For Windows 10 and 11v0.2.7 · what's new →

Finally, an IDE built for the agent era.

Other editors added an agent. Codee3 is built around them: the project remembers, so Claude Code, Codex and Gemini CLI never start from zero. For Windows.

win10/11 · x6413.7 MByour own sign-inno usage data sentsha256 7bc5…12eb
You're on macOSLinux. Codee3 runs on Windows today; macOSLinux comes later.Email me when it's ready
Codee3 · Service Bay
The Codee3 IDE, Founder
Bring your own agent
Why it's different

Other IDEs remember in the chat. Codee3 remembers in the project.

Most AI IDEs are older editors with an agent added on. Close the chat or switch agents and you explain the project again. In Codee3 the project keeps a brain: what was decided, and why. Every agent reads it.

MEMORY IN THE CHAT
CodexNew chat
So, the project is a booking app. Bookings close at 5pm, no card payments online, deposits go through Polar, and last week we decided…explaining again · 3rd time this week
Re-explaining is where the tokens go, and where agents drift.
MEMORY IN THE PROJECT
Codexcontext carried
brain · read on startD-014 Bookings close at 5pmD-015 No card payments onlineD-016 Deposits through Polar
Picking up the booking form where it was left. Deposits stay on Polar (D-016).
Same project, any agent, any subscription. Nothing to explain again.
START FRESH, KEEP THE CONTEXTabout 70%fewer context tokens sent per call (median), in our own use: 39 handovers; about 55% by cost

Because the project holds the context, you can close a long chat and start fresh at any time. In our own use, across 39 handovers, starting a fresh session from a handover cut the context tokens sent per call by a median of about 70% over the 20 calls after it, against the 20 before (about 55% by cost).

How we measured
  • From 658 Claude Code sessions saved on the founder's own computer; the 39 handovers fall between 8 and 21 Oct 2026.
  • A handover: a fresh session whose first prompt is a handover, started within 6 hours of a session of 100+ calls in the same repository.
  • Median context tokens sent per call: the first 20 calls after the handover vs the last 20 before it.
  • Cost weighting: cache reads 0.1×, cache writes 1.25× (1-hour writes 2×), output 5×.
  • One developer (the founder), mostly large-context models. Results vary.
handoverbrain D-014…D-016 · booking form 80% · next: testsfresh session · call 1
context sent per callafter a fresh start −70%
How Founder works

Say it once. Helpers do the work. You decide.

One ask turns into several jobs running at once. You only step in when a decision is yours.

01 · YOUSay what you wantAdd online booking. Deposits through Polar.
02 · PLANPlans the jobsbooking formdeposit flowhelp page
03 · HELPERSWork at the same timeCodexClaude CodeGemini CLI
04 · NEEDS YOUAnswer one questionDeposits: Polar or Stripe?PolarStripe
05 · LANDMerge when happy14/14 checksc3/booking → main
What's inside

A normal IDE, with your agents beside the code.

Start free. When one agent isn't enough, Founder adds the parts that keep several of them in step.

FREE

Uses your own subscriptions

Sign in with the account you already pay for. Codee3 never resells AI and never sees a key or a password.

Claude CodeYour Claude planSigned in
CodexYour ChatGPT planSigned in
Gemini CLIYour Google AI planSigned in
keys seen by codee3: 0
FREE

A real IDE underneath

Code, terminal, search and extensions. Markdown and HTML open as source, preview, or both side by side.

DECISIONS.md
# Booking rules
- Bookings close at **5pm**
- No card payments online
- Deposits through Polar
Booking rules
  • Bookings close at 5pm
  • No card payments online
  • Deposits through Polar
FOUNDER

Helpers that work at the same time

Hand a job to several helpers at once. Each works in its own safe copy of your code, so they can't overwrite each other.

CodexBuilder · websitec3/booking-formWriting tests
Claude CodeFixer · appc3/fix-timezonesReady to land
Gemini CLIWriter · docsc3/help-pagesDrafting
FOUNDER

One list of what's waiting on you

Every question an agent is stuck on lands in one inbox, called Needs you, even on Free. Founder adds the orchestrator’s questions.

CodexBuilder · websiteDeposits: Polar or Stripe?PolarStripe
Claude CodeFixer · app asks to rename a table
FOUNDER

The brain, enforced

Every agent reads the brain, even on Free. Founder adds guards: a change that breaks a decision is stopped before it's written.

D-014Bookings close at 5pm
D-015No card payments online
D-016Deposits through Polar
guard stopped a change to checkout.ts · breaks D-015
FOUNDER

Finished work lands when you say

Look over what an agent changed, then land it: merge it into your main code in one step, even on Free. Founder lands its helpers’ work the same way.

c3/booking-form → main✓ 14/14 checks
src/booking/Form.tsx+86−12
src/booking/rules.ts+24−3
tests/booking.test.ts+41
ReviewLand
Extensions

Connect the services your project already uses.

Turn one on for a project and your agents can deploy, check errors, or read the ticket, with your own account.

arriving in the next release
GitHub
Vercel
Supabase
Stripe
Figma
Resend
Playwright
Google Calendar
Cloudflare
Netlify
Firebase
Clerk
Polar
Sentry
PostHog
Slack
Linear
Notion
Jira & Confluence
+ your own
Under the hood

Small, local, and yours.

Built for Windows first. Your agents run on your machine with your accounts. Codee3 keeps nothing about how you work, and the licence check works offline.

CtrlPfind any fileCtrlNnew agent
platform
Windows 10 / 11 · x64
installer
13.7 MB · .exe
agents
Claude Code · Codex · Gemini CLI
ai billing
your own plans · never resold
usage data
never sent
keys seen
0
licence
3 computers · offline · 14 days grace
Windows first

Built for the PC on your desk.

Most agent tools start on the Mac. Codee3 starts on Windows: native window controls, Windows paths, PowerShell in the terminal, and it pins to your taskbar like any other app.

Win↑ snapCtrlN new agent
Codee3 · Service Bay–□✕
srcbookingForm.tsxrules.tsREADME.md
export function BookingForm() {const slots = useSlots('5pm')+ const deposit = usePolar()}
Claude CodeAdded the deposit step. Tests pass.
RecentService Bayshop+ New agentCtrl N
Windows>_
Pricing

Free to start. One price for more.

FREEUS$0

The IDE, agent chats beside your code, the project brain and landing, for up to two projects open at a time. No time limit.

Download for Windows
FOUNDERUS$149a yearStandard: US$199 a year once the orchestration is complete

The brain, enforced. Guards stop drift, an orchestrator hands jobs to helpers working in parallel, and every step is recorded. Unlimited projects.

Get notified
FAQ

Questions

All questions →
What is the brain?+

The project’s own record of what was decided and why. Every agent reads it, whichever agent and whichever subscription, so you don’t explain the project again. In Founder, guards enforce it.

Is Codee3 free?+

Yes. The IDE, agent chats beside your code, the project brain and landing an agent’s finished work are free for up to two projects open at a time, with no time limit. Founder (US$149 a year) adds an orchestrator, helpers working in parallel and the brain’s checks.

Which AI agents does it work with?+

Claude Code, Codex and Gemini CLI. You sign in with your own Claude, ChatGPT or Google account, inside the agent, as you do today. Setting each up: Claude Code GUI for Windows, Codex CLI on Windows and Gemini CLI GUI for Windows.

Why does Windows warn me when I install?+

The installer isn’t code-signed yet, so Windows SmartScreen may say “Windows protected your PC”. Choose More info, then Run anyway. You can check the file’s fingerprint on the Download page first.

Is there a Mac or Linux version?+

Not yet. Both are planned. Leave your email on the Download page and we’ll write once when yours is ready.

Bring your agents. Start free.

Download for Windowsv0.2.7 · 13.7 MB · sha256 7bc5…12eb