Class LangChainModelRunner

Runner implementation for LangChain chat models.

Implements the unified Runner protocol via run. Returned by LangChainRunnerFactory.createModel.

Hierarchy

LangChainModelRunner

Implements

Runner

Index

Constructors

Properties

_config _llm _logger?

Methods

_runCompletion _runStructured getChatModel run

Constructors

constructor

new LangChainModelRunner(llm, config, logger?): LangChainModelRunner
Parameters
- llm: BaseChatModel<BaseChatModelCallOptions, AIMessageChunk<MessageStructure<MessageToolSet>>>
- config: LDAICompletionConfig
- Optional logger: LDLogger
  Optional
Returns LangChainModelRunner
- Defined in ai-providers/server-ai-langchain/src/LangChainModelRunner.ts:25

Properties

`Private` _config

_config: LDAICompletionConfig

`Private` _llm

_llm: BaseChatModel<BaseChatModelCallOptions, AIMessageChunk<MessageStructure<MessageToolSet>>>

`Private` `Optional` _logger

_logger?: LDLogger

Methods

`Private` _runCompletion

_runCompletion(messages): Promise<RunnerResult>
Parameters
- messages: LDMessage[]
Returns Promise<RunnerResult>
- Defined in ai-providers/server-ai-langchain/src/LangChainModelRunner.ts:60

`Private` _runStructured

_runStructured(messages, outputType): Promise<RunnerResult>
Parameters
- messages: LDMessage[]
- outputType: Record<string, unknown>
Returns Promise<RunnerResult>
- Defined in ai-providers/server-ai-langchain/src/LangChainModelRunner.ts:87

getChatModel

getChatModel(): BaseChatModel<BaseChatModelCallOptions, AIMessageChunk<MessageStructure<MessageToolSet>>>
Get the underlying LangChain model instance.

Returns BaseChatModel<BaseChatModelCallOptions, AIMessageChunk<MessageStructure<MessageToolSet>>>
- Defined in ai-providers/server-ai-langchain/src/LangChainModelRunner.ts:56

run

run(input, outputType?): Promise<RunnerResult>
Run the LangChain model with the given user prompt.

Prepends any messages defined in the AI config (system prompt, etc.) before the user prompt.
Parameters
- input: string
  
  The user prompt string.
- Optional outputType: Record<string, unknown>
  
  Optional JSON schema for structured output. When provided, the parsed result is exposed via RunnerResult.parsed.
  
  Optional
Returns Promise<RunnerResult>
Implementation of Runner.run
- Defined in ai-providers/server-ai-langchain/src/LangChainModelRunner.ts:41

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