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Use the LangChain adapter when your agent is built as a LangChain chain, runnable, or agent object.

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Manifest

runtime:
  adapter:
    type: "langchain"
    entry_point: "src.main:chain"

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Runtime Behavior

Charm loads the entry point and forwards the user’s input payload into the LangChain object. The result is converted into a response the Store can display.

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Best For

  • Prompt chains.
  • Tool-using LangChain agents.
  • RAG workflows.
  • Existing LangChain projects you want to package for Charm.

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Notes

  • Declare required model and tool keys in runtime.adapter.environment_variables.
  • Keep outputs JSON-serializable when possible.
  • Use mode: "full" only if you need browser or multimedia dependencies.