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Class: ContextChatEngine

ContextChatEngine uses the Index to get the appropriate context for each query. The context is stored in the system prompt, and the chat history is chunk: ChatResponseChunk, nodes?: NodeWithScore<import("/Users/marcus/code/llamaindex/LlamaIndexTS/packages/core/src/Node").Metadata>[], nodes?: NodeWithScore<import("/Users/marcus/code/llamaindex/LlamaIndexTS/packages/core/src/Node").Metadata>[]lowing the appropriate context to be surfaced for each query.

Extends​

Implements​

Constructors​

new ContextChatEngine()​

new ContextChatEngine(init): ContextChatEngine

Parameters​

• init

• init.chatHistory?: ChatMessage[]

• init.chatModel?: LLM<object, object>

• init.contextRole?: MessageType

• init.contextSystemPrompt?

• init.nodePostprocessors?: BaseNodePostprocessor[]

• init.retriever: BaseRetriever

• init.systemPrompt?: string

Returns​

ContextChatEngine

Overrides​

PromptMixin . constructor

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:35

Properties​

chatHistory​

chatHistory: ChatHistory<object>

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:31

chatModel​

chatModel: LLM<object, object>

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:30

contextGenerator​

contextGenerator: ContextGenerator

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:32

systemPrompt?​

optional systemPrompt: string

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:33

Methods​

_getPromptModules()​

protected _getPromptModules(): Record<string, ContextGenerator>

Returns​

Record<string, ContextGenerator>

Overrides​

PromptMixin . _getPromptModules

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:56

_getPrompts()​

protected _getPrompts(): PromptsDict

Returns​

PromptsDict

Inherited from​

PromptMixin . _getPrompts

Source​

packages/llamaindex/src/prompts/Mixin.ts:78

_updatePrompts()​

protected _updatePrompts(promptsDict): void

Parameters​

• promptsDict: PromptsDict

Returns​

void

Inherited from​

PromptMixin . _updatePrompts

Source​

packages/llamaindex/src/prompts/Mixin.ts:86

chat()​

chat(params)​

chat(params): Promise<AsyncIterable <EngineResponse>>

Send message along with the class's current chat history to the LLM.

Parameters​

• params: ChatEngineParamsStreaming

Returns​

Promise<AsyncIterable <EngineResponse>>

Implementation of​

ChatEngine . chat

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:62

chat(params)​

chat(params): Promise <EngineResponse>

Parameters​

• params: ChatEngineParamsNonStreaming

Returns​

Promise <EngineResponse>

Implementation of​

ChatEngine . chat

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:65

getPrompts()​

getPrompts(): PromptsDict

Returns all prompts from the mixin and its modules

Returns​

PromptsDict

Inherited from​

PromptMixin . getPrompts

Source​

packages/llamaindex/src/prompts/Mixin.ts:27

prepareRequestMessages()​

private prepareRequestMessages(message, chatHistory): Promise<object>

Parameters​

• message: MessageContent

• chatHistory: ChatHistory<object>

Returns​

Promise<object>

messages​

messages: ChatMessage<object>[]

nodes​

nodes: NodeWithScore <Metadata>[] = context.nodes

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:106

prependSystemPrompt()​

private prependSystemPrompt(message): ChatMessage

Parameters​

• message: ChatMessage

Returns​

ChatMessage

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:121

reset()​

reset(): void

Resets the chat history so that it's empty.

Returns​

void

Implementation of​

ChatEngine . reset

Source​

packages/llamaindex/src/engines/chat/ContextChatEngine.ts:102

updatePrompts()​

updatePrompts(promptsDict): void

Updates the prompts in the mixin and its modules

Parameters​

• promptsDict: PromptsDict

Returns​

void

Inherited from​

PromptMixin . updatePrompts

Source​

packages/llamaindex/src/prompts/Mixin.ts:48

validatePrompts()​

validatePrompts(promptsDict, moduleDict): void

Validates the prompt keys and module keys

Parameters​

• promptsDict: PromptsDict

• moduleDict: ModuleDict

Returns​

void

Inherited from​

PromptMixin . validatePrompts

Source​

packages/llamaindex/src/prompts/Mixin.ts:10