Look first. Change second.
AI code that's almost right is the hardest kind to fix. cix is a desktop app that has your AI look up what a change will touch before it edits, and check the result after.
For Mac. Works with a ChatGPT plan (through Codex) or your own OpenAI or Anthropic API key.
Example, shortened. What each AI can do differs today: What each AI choice gets
Where AI coding goes wrong, and what cix does about it
It checks what a change will touch.
The usual way AI breaks things: it fixes one spot and changes another it never looked at. cix shows your AI every place that uses the code, and what that code depends on, before it edits. With Codex or an OpenAI key it also sees which tests and pages a change affects. What each AI choice gets
It looks things up instead of guessing.
An AI that only sees the files it happened to open fills the gaps with guesses. cix indexes your project, so your AI can search all of it and read the tables your code defines.
Done means the checks passed.
AI is quick to say "done". In cix, a plan step is finished when its checks pass, and small jobs skip the steps they don't need. What each AI choice gets
Nothing gets decided twice.
Start every conversation from zero and you explain it all again, and may get a different answer. Decisions, plans and research are saved with the work, so the next conversation starts from them. On paid plans.
New code goes where it belongs.
Left alone, AI invents new folders and names. Before a new file is written, cix checks its name and folder against how your project is already laid out.
Two agents never edit the same file.
Run two conversations at once and they can overwrite each other's work. In cix each file is claimed before it's edited, so the second one is told the file is in use.
The AI you already pay for.
A ChatGPT plan through Codex, or your own OpenAI or Anthropic API key. Every AI choice follows the same method.
See the idea before any code is written.
An example sign-in flow drawn in cix, including common failure paths. See the whole chart


Your code
What happens to it
The AI you choose sees your messages and the code it reads. cix keeps an index of your code in your account, so the AI can find its way around it. We don't train models on your code, and we don't sell it.
Plans
Free
The cix app with your own AI and one repository.
Paid plans
Everything in Free, more repositories, and saved research, designs and plans across every conversation and computer.