langchain/dist/agents/annotation.cjs

Typescript bindings for langchain

const require_rolldown_runtime = require('../_virtual/rolldown_runtime.cjs');
const __langchain_langgraph = require_rolldown_runtime.__toESM(require("@langchain/langgraph"));
const zod_v3 = require_rolldown_runtime.__toESM(require("zod/v3"));
const __langchain_langgraph_zod = require_rolldown_runtime.__toESM(require("@langchain/langgraph/zod"));

//#region src/agents/annotation.ts
function createAgentAnnotationConditional(hasStructuredResponse = true, stateSchema, middlewareList = []) {
	/**
	* Create Zod schema object to preserve jsonSchemaExtra
	* metadata for LangGraph Studio using v3-compatible withLangGraph
	*/
	const zodSchema = {
		messages: (0, __langchain_langgraph_zod.withLangGraph)(zod_v3.z.custom(), __langchain_langgraph.MessagesZodMeta),
		jumpTo: zod_v3.z.union([
			zod_v3.z.literal("model_request"),
			zod_v3.z.literal("tools"),
			zod_v3.z.undefined()
		]).optional()
	};
	const applySchema = (schema) => {
		const { shape } = schema;
		for (const [key, schema$1] of Object.entries(shape)) {
			/**
			* Skip private state properties
			*/
			if (key.startsWith("_")) continue;
			if (!(key in zodSchema)) zodSchema[key] = schema$1;
		}
	};
	if (stateSchema && "shape" in stateSchema) applySchema(stateSchema);
	for (const middleware of middlewareList) if (middleware.stateSchema) applySchema(middleware.stateSchema);
	if (hasStructuredResponse) zodSchema.structuredResponse = zod_v3.z.any().optional();
	return zod_v3.z.object(zodSchema);
}
const PreHookAnnotation = zod_v3.z.object({
	llmInputMessages: (0, __langchain_langgraph_zod.withLangGraph)(zod_v3.z.custom(), {
		reducer: { fn: (_x, update) => __langchain_langgraph.MessagesZodMeta.reducer.fn([], update) },
		default: () => []
	}),
	messages: (0, __langchain_langgraph_zod.withLangGraph)(zod_v3.z.custom(), __langchain_langgraph.MessagesZodMeta)
});

//#endregion
exports.createAgentAnnotationConditional = createAgentAnnotationConditional;
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