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fix(langchain): Prevent exception when using plan & execute agent with no tools #6744

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merged 3 commits into from
Sep 12, 2024
Merged

fix(langchain): Prevent exception when using plan & execute agent with no tools #6744

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2ece692
fix: Prevent exception when using plan & execute agent with no tools
OlegIvaniv Sep 12, 2024
c4bfd76
Merge branch 'main' into fix_plan_and_execute_agent_crashing
bracesproul Sep 12, 2024
3181144
Update langchain/src/experimental/plan_and_execute/tests/plan_and_exe…
bracesproul Sep 12, 2024
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2 changes: 1 addition & 1 deletion langchain/src/experimental/plan_and_execute/agent_executor.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ export class PlanAndExecuteAgentExecutor extends BaseChain {
}) {
let agent;

if (isDynamicStructuredTool(tools[0])) {
if (tools.length > 0 && isDynamicStructuredTool(tools[0])) {
agent = StructuredChatAgent.fromLLMAndTools(llm, tools, {
humanMessageTemplate,
inputVariables: ["previous_steps", "current_step", "agent_scratchpad"],
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18 changes: 18 additions & 0 deletions langchain/src/experimental/plan_and_execute/tests/plan_and_execute.int.test.ts
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Expand Up @@ -67,3 +67,21 @@ test.skip("Run agent with a sequential math problem", async () => {

// console.log(result);
});

test.skip("Should run agent with no tools", async () => {
const model = new ChatOpenAI({
temperature: 0,
modelName: "gpt-3.5-turbo",
verbose: true,
});
const executor = await PlanAndExecuteAgentExecutor.fromLLMAndTools({
llm: model,
tools: [],
});

// @eslint-disable-next-line/@typescript-eslint/ban-ts-comment
// @ts-expect-error unused var
const result = await executor.call({
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input: `Who is the current president of the United States? What is their current age raised to the second power?`,
});
});
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