Class LangChainAdapter

LangChain adapter — wraps LangChain callbacks

Hierarchy

FrameworkAdapter
- LangChainAdapter

Index

Constructors

constructor

new LangChainAdapter(
    agentId: string,
    options?: Partial<Omit<AdapterConfig, "agentId" | "framework">>,
    callbacks?: AdapterCallbacks,
): LangChainAdapter
Parameters
- agentId: string
- Optionaloptions: Partial<Omit<AdapterConfig, "agentId" | "framework">>
- Optionalcallbacks: AdapterCallbacks
Returns LangChainAdapter
Overrides FrameworkAdapter.constructor
- Defined in src/sdk/frameworkAdapters.ts:257

Properties

`Protected`callbacks

callbacks: AdapterCallbacks

`Protected`config

config: AdapterConfig

`Protected`session

session: AdapterSession

Methods

endSession

endSession(): AdapterSession
End the session

Returns AdapterSession
Inherited from FrameworkAdapter.endSession
- Defined in src/sdk/frameworkAdapters.ts:205

getCallbackHandler

getCallbackHandler(): Record<string, (...args: unknown[]) => void>
Create a LangChain-compatible callback handler object

Returns Record<string, (...args: unknown[]) => void>
- Defined in src/sdk/frameworkAdapters.ts:271

getEventsByType

getEventsByType(
    type:
        | "error"
        | "decision"
        | "llm_call"
        | "tool_call"
        | "agent_step"
        | "chain_start"
        | "chain_end",
): AdapterEvent[]
Get events by type
Parameters
- type:
      | "error"
      | "decision"
      | "llm_call"
      | "tool_call"
      | "agent_step"
      | "chain_start"
      | "chain_end"
Returns AdapterEvent[]
Inherited from FrameworkAdapter.getEventsByType
- Defined in src/sdk/frameworkAdapters.ts:219

getSession

getSession(): AdapterSession
Get the current session

Returns AdapterSession
Inherited from FrameworkAdapter.getSession
- Defined in src/sdk/frameworkAdapters.ts:211

getSummary

getSummary(): {
    actionLimitReached: boolean;
    agentId: string;
    budgetExceeded: boolean;
    durationMs: number;
    framework: FrameworkType;
    sessionId: string;
    totalActions: number;
    totalCostUsd: number;
    totalErrors: number;
    totalEvents: number;
    totalTokens: number;
}
Get session summary

Returns {
    actionLimitReached: boolean;
    agentId: string;
    budgetExceeded: boolean;
    durationMs: number;
    framework: FrameworkType;
    sessionId: string;
    totalActions: number;
    totalCostUsd: number;
    totalErrors: number;
    totalEvents: number;
    totalTokens: number;
}
Inherited from FrameworkAdapter.getSummary
- Defined in src/sdk/frameworkAdapters.ts:224

recordAgentStep

recordAgentStep(step: number, action: string, reasoning: string): AdapterEvent
Record an agent reasoning step
Parameters
- step: number
- action: string
- reasoning: string
Returns AdapterEvent
Inherited from FrameworkAdapter.recordAgentStep
- Defined in src/sdk/frameworkAdapters.ts:158

recordError

recordError(error: Error): AdapterEvent
Record an error
Parameters
- error: Error
Returns AdapterEvent
Inherited from FrameworkAdapter.recordError
- Defined in src/sdk/frameworkAdapters.ts:175

recordLLMCall

recordLLMCall(
    name: string,
    input: unknown,
    output: unknown,
    tokens: { completion: number; prompt: number },
    costUsd: number,
    durationMs: number,
): AdapterEvent
Record an LLM call
Parameters
- name: string
- input: unknown
- output: unknown
- tokens: { completion: number; prompt: number }
- costUsd: number
- durationMs: number
Returns AdapterEvent
Inherited from FrameworkAdapter.recordLLMCall
- Defined in src/sdk/frameworkAdapters.ts:110

recordToolCall

recordToolCall(
    name: string,
    input: unknown,
    output: unknown,
    durationMs: number,
): AdapterEvent
Record a tool call
Parameters
- name: string
- input: unknown
- output: unknown
- durationMs: number
Returns AdapterEvent
Inherited from FrameworkAdapter.recordToolCall
- Defined in src/sdk/frameworkAdapters.ts:136

shouldStop

shouldStop(): boolean
Check if the agent should stop (budget exceeded or action limit)

Returns boolean
Inherited from FrameworkAdapter.shouldStop
- Defined in src/sdk/frameworkAdapters.ts:214

Class LangChainAdapter

Hierarchy

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

Returns LangChainAdapter

Properties

Protectedcallbacks

Protectedconfig

Protectedsession

Methods

endSession

Returns AdapterSession

getCallbackHandler

Returns Record<string, (...args: unknown[]) => void>

getEventsByType

Parameters

Returns AdapterEvent[]

getSession

Returns AdapterSession

getSummary

Returns { actionLimitReached: boolean; agentId: string; budgetExceeded: boolean; durationMs: number; framework: FrameworkType; sessionId: string; totalActions: number; totalCostUsd: number; totalErrors: number; totalEvents: number; totalTokens: number;}

recordAgentStep

Parameters

Returns AdapterEvent

recordError

Parameters

Returns AdapterEvent

recordLLMCall

Parameters

Returns AdapterEvent

recordToolCall

Parameters

Returns AdapterEvent

shouldStop

Returns boolean

Settings

On This Page

`Protected`callbacks

`Protected`config

`Protected`session

Returns {
actionLimitReached: boolean;
agentId: string;
budgetExceeded: boolean;
durationMs: number;
framework: FrameworkType;
sessionId: string;
totalActions: number;
totalCostUsd: number;
totalErrors: number;
totalEvents: number;
totalTokens: number;
}