feat(gemini_oauth): full Cloud Code API integration with project discovery

- Register gemini_oauth as a dedicated backend in config/llm.rs (skip
  registry fallback, preserve backend name, suppress unknown-backend warning)
- Fix app.rs credential guard to exclude backends with dedicated configs
  (gemini_oauth, bedrock) from the provider.is_none() check
- Auto-discover Cloud Code project_id via loadCodeAssist when credentials
  lack it (e.g. created by the original Gemini CLI)
- Persist discovered project_id to credentials file for subsequent runs
- Add safety settings (BLOCK_NONE), gated behind GEMINI_SAFETY_BLOCK_NONE env
- Add thinkingConfig: budget-based for Gemini 2.5, level-based for Gemini 3.x
  (without includeThoughts to avoid empty responses from reasoning.rs stripping)
- Add thought signature injection for Gemini 3.x preview APIs
- Add history curation to filter invalid model outputs before re-sending
- Add extended generationConfig env vars (topP, topK, seed, penalties,
  responseMimeType, responseJsonSchema, cachedContent)
- Add custom headers support via GEMINI_CLI_CUSTOM_HEADERS
- Add API key auth mode (GEMINI_API_KEY + GEMINI_API_KEY_AUTH_MECHANISM)
- Add SSE metadata extraction (modelVersion, credits, promptFeedback,
  groundingMetadata, citationMetadata, cachedContentTokenCount)
- Add countTokens API support
- Add new models to wizard (gemini-3.1-pro-preview-customtools,
  gemini-3-pro-preview, gemini-3.1-flash-lite-preview)
- Update docs/LLM_PROVIDERS.md with new models and routing rules
- Rewrite regression tests with comprehensive coverage (23 unit tests pass)
This commit is contained in:
Artem
2026-03-18 13:53:58 +03:00
parent 6e86f50bc5
commit d4bfc2db58
7 changed files with 947 additions and 68 deletions
+6 -2
View File
@@ -88,15 +88,19 @@ GEMINI_MODEL=gemini-2.5-flash
| Model | ID | Notes |
|---|---|---|
| Gemini 3.1 Pro | `gemini-3.1-pro-preview` | Latest, strongest reasoning |
| Gemini 3.1 Pro Custom Tools | `gemini-3.1-pro-preview-customtools` | Enhanced tool use |
| Gemini 3 Pro | `gemini-3-pro-preview` | Preview |
| Gemini 3 Flash | `gemini-3-flash-preview` | Fast preview with thinking |
| Gemini 3.1 Flash Lite | `gemini-3.1-flash-lite-preview` | Preview, lightweight |
| Gemini 2.5 Pro | `gemini-2.5-pro` | Stable, strong reasoning |
| Gemini 2.5 Flash | `gemini-2.5-flash` | Fast, good quality |
| Gemini 2.5 Flash Lite | `gemini-2.5-flash-lite` | Fastest, lightweight |
### Cloud Code API vs standard API
Models containing `preview` or `gemini-3` in the name route through the
Cloud Code API (`cloudcode-pa.googleapis.com`) which supports SSE streaming
Models containing `-preview` (with hyphen) or `gemini-3` in the name, as well
as any `gemini-` model with major version >= 2, route through the Cloud Code
API (`cloudcode-pa.googleapis.com`) which supports SSE streaming
and project-scoped access. Other models use the standard Generative Language
API (`generativelanguage.googleapis.com`).