Function langchainRegistration

langchainRegistration(agent): LangChainAgentRegistration
Validates a LangChain-style agent exposes tools (including required chat_tool) and returns a LangChainAgentRegistration for RemotePlayWorld.addAgent.
Parameters
- agent: unknown
  Return value from createAgent (or equivalent) with a tools array.
Returns LangChainAgentRegistration
Throws
Error if tools are missing or chat_tool is not present.

Remarks
Callers: user code before RemotePlayWorld.addAgent. Callees: internal validation helpers and agentPlayDebug.
- Defined in packages/sdk/src/platforms/langchain.ts:187