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The GitHub Copilot desktop app keeps its built-in models and adds Fireworks alongside them. For the copilot command, see Copilot CLI. Preview OpenAI Chat Completions Nexus Auto with Provider Keys

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Quick start

Install and sign in

You need Node.js 22 or later, git, and bash. On Windows, run the installer from Git Bash. PowerShell breaks the script’s line endings.
Sign in with your browser, or paste a Fireworks API key (fw_...).Already set up? Skip to step 2.

Quit the app

Quit the app before you connect or run off. A running app overwrites the change from memory. If it’s open, Nexus CLI waits until you quit. --force writes anyway, which isn’t recommended.

Connect the Copilot App

Reopen and pick a model

Reopen the app and pick a model under Fireworks in the model picker. The default is auto. To change the default, run nexus copilot-app --model glm-latest.
nexus copilot-app status shows the provider, where the key comes from, and the configured model.
The app’s bring-your-own-key path does not support image input, the hover-card Context row, or AI-credits pricing.

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Use Nexus Auto

Nexus CLI registers auto in the app.
  • Anthropic and OpenAI model turns: connect a Provider Key. Nexus CLI doesn’t send keys saved with nexus auto from the app, and the app can’t send extra headers, so manual setup needs Provider Keys too. Without a Provider Key, Nexus Auto serves every turn with open models.
See Which harnesses can send provider keys.

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MCP and tools

Nexus CLI doesn’t touch MCP. Set up servers in the app as usual. Nexus CLI does not add web search to the Copilot App. See Web Search.

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Microsoft Foundry

Nexus CLI doesn’t connect the Copilot App to Microsoft Foundry. For other options, see Nexus for Microsoft Foundry.

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Troubleshooting

See Nexus Auto for issues that affect every harness.

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Manual setup (advanced)

In Settings → Model providers, add a provider with the values Nexus CLI uses: See what changes without the Nexus CLI.

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What the Nexus CLI writes

Nexus CLI writes to ~/.copilot/data.db (SQLite, movable with COPILOT_HOME):The file is saved with mode 0600. off deletes the provider and its models and leaves providers you added yourself. Use --db-path for a non-default database.