fe0dd038ee
- Langfuse SDK v4: fix prompt-to-trace linking (as_type=generation) - tracing: compile_prompt with Langfuse managed prompt fallback - journey: remove journey CLI subcommand (keep only interactive) - LLM: add service-specific llm modules for batch-agent and chat - gitignore: exclude eval private test data - config: add LANGFUSE settings to shared config
78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
"""LLM factory — centralised model instantiation via LiteLLM.
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Adapted from app/core/llm.py for the Chat Service.
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Uses shared.config.settings instead of app.config.settings.
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"""
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from __future__ import annotations
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import os
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import warnings
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from openai import AsyncOpenAI
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import litellm
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from langchain_openai import ChatOpenAI
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from langchain_litellm import ChatLiteLLM
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from shared.config import settings
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litellm.drop_params = True
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warnings.filterwarnings(
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"ignore",
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message=r"PydanticSerializationUnexpectedValue\(Expected `ResponseAPIUsage`",
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category=UserWarning,
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)
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def _api_key_for_model(model: str) -> str | None:
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if model.startswith("anthropic/"):
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return settings.ANTHROPIC_API_KEY or None
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if model.startswith("gemini/") or model.startswith("google/"):
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return settings.GOOGLE_API_KEY or None
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if model.startswith("cerebras/"):
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return settings.CEREBRAS_API_KEY or None
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if model.startswith("github/"):
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return settings.GITHUB_TOKEN or None
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if model.startswith("github_copilot/"):
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return None
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return settings.OPENAI_API_KEY or None
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def get_llm(
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*,
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model: str | None = None,
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temperature: float = 0,
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callbacks: list | None = None,
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) -> ChatOpenAI | ChatLiteLLM:
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model = model or settings.LLM_MODEL
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if settings.GITHUB_COPILOT_TOKEN_DIR:
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os.environ.setdefault("GITHUB_COPILOT_TOKEN_DIR", settings.GITHUB_COPILOT_TOKEN_DIR)
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if settings.GITHUB_TOKEN:
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os.environ.setdefault("GITHUB_TOKEN", settings.GITHUB_TOKEN)
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if "/" in model:
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return ChatLiteLLM(model=model, temperature=temperature, callbacks=callbacks)
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return ChatOpenAI(
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model=model,
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temperature=temperature,
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api_key=_api_key_for_model(model),
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callbacks=callbacks,
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)
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async def embed(text: str) -> list[float]:
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model = settings.LLM_EMBED_MODEL
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if model.startswith("github_copilot/") or "/" in model:
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response = await litellm.aembedding(model=model, input=[text])
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return response.data[0]["embedding"]
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client = AsyncOpenAI(api_key=settings.OPENAI_API_KEY)
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response = await client.embeddings.create(model=model, input=text)
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return response.data[0].embedding
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