DeepSeek-Reasonix

DeepSeek-Reasonix (Reasonix) is an open-source coding agent that runs on your own computer. You describe a task in plain language; it reads code, edits files and runs commands and tests inside the project folder you pick, and shows each step. The model is a service you configure: a DeepSeek preset is built in, and any OpenAI-compatible endpoint is one config entry. You pay the model provider directly, and the provider receives what the agent reads.

The README says the project ships on two lines. Reasonix 2.x (Go, on the `studio` branch, now the default) is in active development and is delivered mainly as the Reasonix Studio desktop app, with a `reasonix` CLI in the same release. Reasonix 1.x (`main-v2`) is in maintenance and installs with `npm i -g reasonix` or Homebrew. The older TypeScript line (0.x) is also in maintenance mode. The same engine can be used from the desktop app, a full-screen terminal UI, `reasonix web` in the browser, or an editor through ACP (Agent Client Protocol) and a VS Code extension.

Configuration is declarative: providers, the agent, enabled tools and plugins live in `reasonix.toml`. MCP servers can contribute tools, prompts and resources, and the extension protocol adds sidecars. You choose how much it may do alone, from asking before every step to working within limits you set, with a plan mode that starts work only after you approve. Files changed by its edit tools are saved first so you can rewind by conversation turn. This review is based on the project's README and repository data; we have not run it ourselves.