Files
gochat/backend/internal
rogee 8e1caa8f49 Replace hand-written LLM layer with CloudWeGo Eino framework
EinoProvider (eino_provider.go, new):
- Implements GoChat's llm.Provider interface by delegating to Eino's
  model.BaseChatModel (Generate + Stream) and embedding.Embedder
- Converts GoChat ChatMessage ↔ Eino schema.Message (role/content/tool_calls)
- Converts Eino ResponseMeta (FinishReason/Usage) → GoChat ChatResponse
- Converts Eino StreamReader → GoChat onChunk callback for SSE streaming
- Embedder type alias = eino's embedding.Embedder interface

NewProviderFromConfig factory:
- Uses eino-ext/components/model/openai.NewChatModel for chat model
- Uses eino-ext/components/embedding/openai.NewEmbedder for embeddings
- Works for all OpenAI-compatible providers (OpenAI/Azure/Ark/Doubao/Qwen)
  by setting llm_base_url in config
- Graceful fallback to hand-written OpenAIProvider if Eino init fails
- Removed previous Anthropic provider switch (Eino's OpenAI impl handles
  Claude via OpenAI-compat endpoint)

Dependencies added:
- github.com/cloudwego/eino v0.9.12 (core framework)
- github.com/cloudwego/eino-ext/components/model/openai v0.1.13
- github.com/cloudwego/eino-ext/components/embedding/openai

Verified:
- go build ./... passes
- go vet passes (llm + app packages)
- go test passes (llm + service, SQLite mode)
- Server starts with Eino provider initialized
- All existing routes work (assistants, auto-reply, RAG, conversation)
- RAG query reaches Eino provider (fails on LLM call without API key,
  confirming Eino is the active provider)
2026-07-08 15:38:08 +08:00
..