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Add Google Gemini CLI and Antigravity OAuth providers

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- Add google-gemini-cli provider: free Gemini 2.0/2.5 via Cloud Code Assist
- Add google-antigravity provider: free Gemini 3, Claude, GPT-OSS via sandbox
- Move OAuth infrastructure from coding-agent to ai package
- Fix thinking signature handling for cross-model handoff
- Fix OpenAI message ID length limit (max 64 chars)
- Add GitHub Copilot overflow pattern detection
- Add OAuth provider tests for context overflow and streaming
This commit is contained in:
Mario Zechner 2025-12-20 18:21:32 +01:00
parent 3266cac0f1
commit c359023c3f
25 changed files with 1392 additions and 413 deletions
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packages/coding-agent/README.md
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@ -117,25 +117,30 @@ Set the environment variable for your provider:
| OpenRouter | `OPENROUTER_API_KEY` |
| ZAI | `ZAI_API_KEY` |
**Anthropic OAuth (Claude Pro/Max):**
**OAuth Providers:**
Use `/login` to authenticate with subscription-based or free-tier providers:
| Provider | Models | Cost |
|----------|--------|------|
| Anthropic (Claude Pro/Max) | Claude models via your subscription | Subscription |
| GitHub Copilot | GPT-4o, Claude, Gemini via Copilot subscription | Subscription |
| Google Gemini CLI | Gemini 2.0/2.5 models | Free (Google account) |
| Google Antigravity | Gemini 3, Claude, GPT-OSS | Free (Google account) |
```bash
pi
/login # Select "Anthropic (Claude Pro/Max)", authorize in browser
/login # Select provider, authorize in browser
```
Tokens stored in `~/.pi/agent/oauth.json`. Use `/logout` to clear.
**GitHub Copilot notes:**
- Press Enter for github.com, or enter your GitHub Enterprise Server domain
- If you get "model not supported" error, enable it in VS Code: Copilot Chat → model selector → select model → "Enable"
**GitHub Copilot OAuth:**
```bash
pi
/login # Select "GitHub Copilot", authorize in browser
```
Press Enter to use github.com, or enter your GitHub Enterprise Server domain (e.g., `github.mycompany.com`).
If you get "The requested model is not supported" error, enable the model in VS Code: Copilot Chat → model selector → select model → "Enable".
**Google providers notes:**
- Gemini CLI uses the production Cloud Code Assist endpoint (standard Gemini models)
- Antigravity uses a sandbox endpoint with access to Gemini 3, Claude (sonnet/opus thinking), and GPT-OSS models
- Both are free with any Google account, subject to rate limits
Tokens stored in `~/.pi/agent/oauth.json`. Use `/logout` to clear.