feat: add native Google Gemini provider and new registry entries#10
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pacifio merged 1 commit intopacifio:mainfrom Apr 9, 2026
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…y entries Add a dedicated Gemini provider using Google's native generateContent API instead of the OpenAI-compatible shim. This enables proper support for Gemini-specific features like safety settings, native tool calling via functionCall/functionResponse, and systemInstruction. Also adds Cohere and SambaNova as OpenAI-compatible registry entries with auto-detect support for command-r model prefixes.
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These seem good, thanks for the contribution @renezander030 |
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Summary
gemini.rs) using Google'sgenerateContentAPI instead of routing through the OpenAI-compatible shim. Supports streaming, tool calling viafunctionCall/functionResponse,systemInstruction, safety settings, and usage token tracking.ApiFormat::Googlevariant in the registry and router so the Gemini provider is selected automatically when usinggoogle/gemini-*model strings.command-r*model prefixes.Details
The existing setup routed Google Gemini through their OpenAI-compat endpoint (
/v1beta/openai), which works but limits access to native Gemini features. The new provider talks directly to thegenerateContentstreaming API, following the sameProvidertrait pattern asAnthropicandOpenAi.Provider count goes from 13 to 15 (Cohere, SambaNova). All existing tests pass plus 3 new tests for the added providers.
Test plan
cargo checkpasses with no new warningscargo test -p cersei-provider-- all 9 tests pass (6 existing + 3 new)from_model_string("google/gemini-2.0-flash")returns aGeminiprovider (requiresGOOGLE_API_KEY)from_model_string("cohere/command-r-plus")returns an OpenAI-compat provider (requiresCOHERE_API_KEY)from_model_string("command-r-plus")auto-detects CohereAddresses #3