Reasonix

Reasonix is a local coding agent (a CLI/TUI, desktop app, browser UI and an editor ACP entry point, all sharing the same engine). It has no built-in aicentos provider, but you can add an OpenAI-compatible [[providers]] entry to ~/.reasonix/config.toml and route requests to aicentos.

PrerequisitesCopy anchor link

Create a dedicated key in the aicentos console (naming it reasonix-cli is recommended). Reasonix stores provider keys in its own global .env file and does not read shell environment variables.

Configuration to fill inCopy anchor link

Setup stepsCopy anchor link

• Install Reasonix (npm, or Homebrew on macOS):

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  npm i -g reasonix

• Put the key into Reasonix's global .env:

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  # macOS / Linux
  echo 'AICENTOS_API_KEY=your_api_key_here' >> ~/.reasonix/.env
  
  # Windows: %APPDATA%\reasonix\.env

• Edit ~/.reasonix/config.toml and merge in the following (do not remove your other existing providers):

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  default_model = "aicentos"
  
  [[providers]]
  name          = "aicentos"
  kind          = "openai"
  base_url      = "https://aicentos.com/v1"
  models        = ["claude-sonnet-5", "deepseek-v4-pro", "qwen3-coder-plus"]
  default       = "claude-sonnet-5"
  api_key_env   = "AICENTOS_API_KEY"
  context_window = 200000

• Start it from a project directory:

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  reasonix

  You can also verify with a one-off task first: reasonix run "Explain in one sentence what project the current directory is". On the desktop app, go through Settings → Model → Access → Add model service → Custom provider instead.

TestCopy anchor link

After starting, send a simple prompt and confirm responses stream back normally. Use /model inside the session to switch models.

NotesCopy anchor link

• base_url should only go up to /v1; Reasonix appends /chat/completions itself.
• The key must be written to ~/.reasonix/.env; export-ing it in the shell or putting it in a project .env will not be recognized as the provider key.
• Choose openai for kind; the native anthropic type maps to the Anthropic Messages endpoint and does not fit here.
• default_model takes the provider's name (aicentos), not a model name.
• If the desktop app's custom provider form asks for the full address, enter https://aicentos.com/v1/chat/completions.
• Project page: https://github.com/esengine/DeepSeek-Reasonix