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LLM provider factories + the LangGraph checkpoint/store registries. The chat-model and embedding factories cache per (provider, kwargs) and import their langchain provider package lazily inside the build; the registry accessors return the running event loop’s singletons that pool checkpoint/store connection resources. Importing this package pulls langchain_core / langgraph — that is the opt-in boundary (the tai42_kit top level stays vendor-free).

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checkpoint_registry

tai42_kit.llm.checkpoint.checkpoint_registry.checkpoint_registry
Return the CheckpointRegistry for the running event loop. One registry per loop; after close_all() the next call builds a fresh registry instead of returning the closed one.

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get_embedding

tai42_kit.llm.embedding.get_embedding
Parameters

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get_embedding_async

tai42_kit.llm.embedding.get_embedding_async
Parameters

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get_llm

tai42_kit.llm.models.get_llm
Parameters

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get_llm_async

tai42_kit.llm.models.get_llm_async
Parameters

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store_registry

tai42_kit.llm.store.store_registry.store_registry
Return the StoreRegistry for the running event loop. One registry per loop; after close_all() the next call builds a fresh registry instead of returning the closed one.