Build and change software
Describe the change you want. The agent explores your project, edits the files, and explains what it did.
Contenox · AI coding agent
What will you make?
The anti-YOLO harness. A policy engine decides what your agent may run, so you never have to switch approvals off.
Free and open sourceUse the AI you preferYou approve what runs
See every step
Every file it reads, every edit and every command shows up as it happens. Nothing runs behind your back.
Use the AI you prefer
ChatGPT, Claude, Gemini, DeepSeek, or models running on your own PC. Switch whenever you like.
Why Contenox
Your machine. Your models. Your policy.
Every way of paying for AI in one app: your ChatGPT plan, an API key, your company's cloud account or a model on your own machine, side by side and switchable per session.
What agents may do is a set of rules you can read: reading files, changing them, running commands. Allow it, ask first or block it, for every project or just one. Sessions and history are stored on your PC. There is no Contenox account and no Contenox server between you and your AI provider.
Download
Get Contenox for your PC.
Free, with no subscription and no hosted service. You pay your AI provider directly, or nothing at all if you run models locally.
Download for Linux Debian / Ubuntu · .deb
Also for Linux .rpm macOS .zip Windows .zip
Verify this download
Every installer is covered by SHA256SUMS and its detached GPG signature.
gpg --import contenox-release.asc
gpg --verify SHA256SUMS.asc SHA256SUMS
sha256sum -c SHA256SUMS
On macOS: shasum -a 256 -c SHA256SUMS
Start here
Set up, connect, learn.
Open source
Built in the open.
All of Contenox is public on GitHub. Read the code, change it, or build it yourself.
Windows 10 and 11
macOS Apple Silicon
Linux .deb and .rpm packages
Apache-2.0 free license
Contenox is free and open source under the Apache-2.0 license.
Phyllobates terribilis 