Using Downsizing with Junie

Route Junie traffic through Downsizing in seconds using the CLI.

Prerequisites

Before linking Junie, either attach a credit card or connect your Anthropic subscription to Downsizing. We also recommend using the CLI — check the CLI guide to install.

Link Junie (Recommended)

With your Anthropic subscription connected, link Junie to route traffic through Downsizing:

bash

ds link junie

The CLI writes a model profile to ~/.junie/models/downsizing.json with your Inference ID and API key pre-filled.

The CLI also sets Downsizing as the default model in ~/.junie/config.json, so you can run Junie without any extra flags:

bash

junie --model custom:downsizing "your task"

Manual Setup

If you prefer to configure manually, create ~/.junie/models/downsizing.json:

json

{
  "baseUrl": "https://api.downsizing.dev/YOUR_INFERENCE_ID/anthropic/v1/messages",
  "id": "claude-sonnet-4-6",
  "apiType": "Anthropic",
  "apiKey": "dws_YOUR_API_KEY",
  "fasterModel": {
    "id": "claude-haiku-4-5"
  }
}

Find your Inference ID and API key in the Downsizing dashboard. Replace YOUR_INFERENCE_ID with the workspace UUID and dws_YOUR_API_KEY with your Downsizing API key.

Verify

Run a quick one-shot task to confirm traffic is routing through Downsizing:

bash

junie --model custom:downsizing "What is 2+2? Reply in one word."

If Junie responds, the proxy is correctly configured. You can also check your savings dashboard to see the request appear in your usage metrics.

Unlinking

To remove Downsizing from Junie and restore your original settings:

bash

ds unlink junie

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