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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 preserved, ideally allowing 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/core/src/engines/chat/ContextChatEngine.ts:36

Properties​

chatHistory​

chatHistory: ChatHistory<object>

Source​

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

chatModel​

chatModel: LLM<object, object>

Source​

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

contextGenerator​

contextGenerator: ContextGenerator

Source​

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

systemPrompt?​

optional systemPrompt: string

Source​

packages/core/src/engines/chat/ContextChatEngine.ts:34

Methods​

_getPromptModules()​

protected _getPromptModules(): Record<string, ContextGenerator>

Returns​

Record<string, ContextGenerator>

Overrides​

PromptMixin . _getPromptModules

Source​

packages/core/src/engines/chat/ContextChatEngine.ts:57

_getPrompts()​

protected _getPrompts(): PromptsDict

Returns​

PromptsDict

Inherited from​

PromptMixin . _getPrompts

Source​

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

_updatePrompts()​

protected _updatePrompts(promptsDict): void

Parameters​

• promptsDict: PromptsDict

Returns​

void

Inherited from​

PromptMixin . _updatePrompts

Source​

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

chat()​

chat(params)​

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

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

Parameters​

• params: ChatEngineParamsStreaming

Returns​

Promise<AsyncIterable <Response>>

Implementation of​

ChatEngine . chat

Source​

packages/core/src/engines/chat/ContextChatEngine.ts:63

chat(params)​

chat(params): Promise <Response>

Parameters​

• params: ChatEngineParamsNonStreaming

Returns​

Promise <Response>

Implementation of​

ChatEngine . chat

Source​

packages/core/src/engines/chat/ContextChatEngine.ts:64

getPrompts()​

getPrompts(): PromptsDict

Returns all prompts from the mixin and its modules

Returns​

PromptsDict

Inherited from​

PromptMixin . getPrompts

Source​

packages/core/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/core/src/engines/chat/ContextChatEngine.ts:108

prependSystemPrompt()​

private prependSystemPrompt(message): ChatMessage

Parameters​

• message: ChatMessage

Returns​

ChatMessage

Source​

packages/core/src/engines/chat/ContextChatEngine.ts:123

reset()​

reset(): void

Resets the chat history so that it's empty.

Returns​

void

Implementation of​

ChatEngine . reset

Source​

packages/core/src/engines/chat/ContextChatEngine.ts:104

updatePrompts()​

updatePrompts(promptsDict): void

Updates the prompts in the mixin and its modules

Parameters​

• promptsDict: PromptsDict

Returns​

void

Inherited from​

PromptMixin . updatePrompts

Source​

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