neptune login

Opens a browser for Anthropic OAuth authentication. Credentials are stored locally and used automatically by AI-powered commands.

Usage

neptune login

Credential resolution order

Neptune resolves Anthropic credentials in this order:

1. --api-key flag (per-command)
2. ANTHROPIC_API_KEY environment variable
3. Stored OAuth credentials (from neptune login)

Notes

• Credentials are saved to ~/.config/neptune/credentials.json (or platform equivalent)
• OAuth tokens are automatically refreshed when expired
• Use ANTHROPIC_API_KEY env var for CI/CD environments where browser login isn't possible