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tools.ts
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tools.ts
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import { CallbackManagerForToolRun } from "@langchain/core/callbacks/manager";
import { Tool, type ToolParams } from "@langchain/core/tools";
import Exa, { ContentsOptions, RegularSearchOptions } from "exa-js";
/**
* Options for the ExaSearchResults tool.
*/
export type ExaSearchRetrieverFields<
T extends ContentsOptions = { text: true }
> = ToolParams & {
client: Exa.default;
searchArgs?: RegularSearchOptions & T;
};
/**
* Tool for the Exa search API.
*/
export class ExaSearchResults<
T extends ContentsOptions = { text: true }
> extends Tool {
static lc_name(): string {
return "ExaSearchResults";
}
description =
"A wrapper around Exa Search. Input should be an Exa-optimized query. Output is a JSON array of the query results";
name = "exa_search_results_json";
private client: Exa.default;
searchArgs?: RegularSearchOptions & T;
constructor(fields: ExaSearchRetrieverFields<T>) {
super(fields);
this.client = fields.client;
this.searchArgs = fields.searchArgs;
}
protected async _call(
input: string,
_runManager?: CallbackManagerForToolRun
): Promise<string> {
return JSON.stringify(
await this.client.searchAndContents<T>(input, this.searchArgs)
);
}
}
export class ExaFindSimilarResults<
T extends ContentsOptions = { text: true }
> extends Tool {
static lc_name(): string {
return "ExaFindSimilarResults";
}
description =
"A wrapper around Exa Find Similar. Input should be an Exa-optimized query. Output is a JSON array of the query results";
name = "exa_find_similar_results_json";
private client: Exa.default;
searchArgs?: RegularSearchOptions & T;
constructor(fields: ExaSearchRetrieverFields<T>) {
super(fields);
this.client = fields.client;
this.searchArgs = fields.searchArgs;
}
protected async _call(
url: string,
_runManager?: CallbackManagerForToolRun
): Promise<string> {
return JSON.stringify(
await this.client.findSimilarAndContents<T>(url, this.searchArgs)
);
}
}