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Copilot CLI: Install, Update, Authenticate, and Launch/Authenticate with OAuth device flow

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Section: First-run and lifecycle commands

Authenticate with OAuth device flow

bash
bash
copilot login
Explanation

Use this outside the interactive slash-command flow when you want an explicit login step.

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Target a GitHub host explicitly during login.
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Download and install the latest version.
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Show help for commands, config, environment, logging, or permissions.
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