Every build, one window
Keep Overwrite, Cooee and the next big idea in independent tabs. Switch projects without mixing terminals, memory, worktrees or approvals.
OVERWRITEOpen portal Built for people with an idea worth shipping
Turn the idea only you can see into software people can use.
Overwrite is a Mac-hosted AI development command centre for solo founders and startup teams. Plan, build, test and release across every project—then keep it moving from iPad or web.
Personal AI subscriptions Mac-owned code and credentials Approval-gated releases
One founder command centre for
Code
Git
Testing
Devices
TestFlight
The productNot another chat box.
Not another chat box.
A place where software gets finished.
Overwrite turns agents, terminals, branches, tests and releases into one visible mission. The product preview uses synthetic project data; every control shown maps to a verified Mac-host capability or the active web portal build.
Mission / Verification
Ship the next confident build
PlanArchitect
Build2 agents
TestIndependent
ReleaseApproval
Live activityMac host
iPhone build completeCodex personal account
Calendar journey replayedIndependent verification
Reviewer evidence readyOperator decision
Your call
Upload build 42 to TestFlight?
Signing passed. 8 evidence items. No unresolved failures.
A small team should not mean a small product.
Keep the speed of a solo builder without giving up separation, review, test evidence or release control.
Use the AI accounts you already pay for
Codex, Claude and compatible provider CLIs keep their own personal-account login. No surprise API meter and no credential handover.
Your Mac does the real work
Repositories, agents, Xcode, simulators, signing and uploads stay on your Mac. The web and iPad portals are secure control surfaces.
Proof before confidence
Independent testers and reviewers capture screenshots, traces, device results and failure capsules. A green badge must be earned.
Parallel, isolated agents
Builders work in owned Git worktrees. Review and integration are visible, bounded and recoverable instead of becoming branch chaos.
You keep the final say
Remote pushes, deployments, production changes and TestFlight uploads wait for a clear, recorded approval—at every autonomy level.
Persistent by designClose the portal.
Close the portal.
The Mac keeps building.
Overwrite is not remote desktop. Your Mac is the secure execution host. The iPad and website are native-resolution views into durable work that continues when your screen closes or your connection disappears.
End-to-end encrypted controlThe relay routes ciphertext. It cannot read project commands or results.
Credentials never leave the MacProvider logins, signing identities and repositories remain local.
Resume without reconstructionQueued work, project boundaries and approval state survive portal disconnects.
Studio MacHOST
Build running02:14 elapsed
Encrypted relay
iPadPORTAL
Connection pausedMac continues
WebPORTAL
Safe to close0 tasks cancelled
Keep momentum.
Add discipline.
Ship the real thing.
Describe the outcome
Give Overwrite the product goal, constraints and what success must look like.
Let the team build
Architect, Builder, Tester and Reviewer roles work in parallel on your Mac.
Inspect the evidence
See what changed, what ran, what failed and what was repaired—from anywhere.
Approve the release
When the proof is strong, send the current build to TestFlight without racing home.
Local authority, remote freedom
Your product stays yours.
Overwrite uses the accounts, repositories and Apple tooling on your Mac. Remote portals receive only the project access you grant. Destructive and external actions stay visible and approval-gated.
- No AI API keys
- No provider-cookie extraction
- No inbound Mac listener
- No silent TestFlight upload
For startup teams
Run more product bets without turning coordination into the job.
For unique-idea founders
Translate your product instinct into a buildable, testable mission.
Founder previewYou have the idea.
Now give it a build system.
Bring the AI subscriptions and Mac you already use. Overwrite brings the command centre, memory, isolation, evidence and release control.