CHYNJ builds software for work that does not belong inside one model, one cloud, or one machine. Start with the tools you need. Keep the ability to change the rest.
Local models, cloud APIs and the Claude Code and Codex CLIs in one picker, with one set of tools, one approval gate and a record of every step.
Linux
64-bit Linux on Intel, AMD or ARM, any distribution. If the installer asks, add Kaptain to your PATH, then run kaptain start; setup opens in your browser.
macOS
macOS 12 or later, Apple silicon or Intel. Run it in Terminal. If the installer asks, add Kaptain to your PATH, then run kaptain start; setup opens in your browser.
Windows
Download for WindowsWindows 10 or 11, 64-bit. Run the file and setup opens in your browser. If Windows SmartScreen warns, choose More info, then Run anyway.
Installing means you accept the Terms. Every step, for every platform: Kaptain Docs.
The dominant software model asks you to rent the workflow, accept the defaults, and stay inside the boundary. Agentic systems need the opposite: the freedom to route, connect, inspect, and change.
Agentic systems should be able to move: between models, between environments, and between the tools that make a workflow useful.
We build for that movement. Local where it helps. Cloud where it earns its place. Software that stays understandable when the workflow grows.
One product, built to build the rest.
Working apps, each built end to end with Kaptain — and each runs locally on your own devices, where Kaptain can drive it. A controllable ecosystem: Kaptain drives them over their local APIs. Every one is being prepared as a free, open release; repo and README links land on these cards as they ship.
We publish the reasoning behind the products: token economics, model routing, agent communication, secured interaction, and the systems required to make agentic development sustainable.
Build the workflow you need now. Keep the ability to change how it runs later.