Coskey, our first product, is available now
Make your AI appsobey you
Cosk builds lightweight local tools for the AI desktop era. The first one, Coskey, lets ChatGPT.app / Codex.app switch between large models freely and smoothly.
Keys in the system keychain · relay bound to loopback · one-click return to stock behaviour
Products
One product, one problem solved
Each Cosk product ships and downloads on its own. What they share: local-first, lightweight, unobtrusive.
Coskey
v0.2.0
Model switching and key management for ChatGPT.app
Switch models in ChatGPT.app / Codex.app freely and smoothly.
The next product is on its way
Progress on new products shows up here
Why Cosk
Tools should be on your side
Local-first
API keys live in the system keychain and the relay listens on loopback only. Your keys and data never leave your machine.
Lightweight and legible
A single Rust core measured in megabytes; it does not patch the app or litter your config files.
Switch freely, leave cleanly
No app modification, no writes to config files; disable it for stock behaviour and uninstall back to a clean system.
Now put your own models behind ChatGPT.app / Codex.app
Install Coskey, add a provider and its key, then open ChatGPT.app / Codex.app as usual. The app itself is never modified.