wip(confidence-engine): checkpoint open-question presentation work

lib/llm/provider.js

@@ -546,10 +546,15 @@ class OpenAIReconstructionProvider {
     this.fetchImpl = fetchImpl;
   }
 
-  async generateReconstruction(prompt, modelName = "gpt-5.6-terra", outputSchema, { signal } = {}) {
+  async generateReconstruction(
+    prompt,
+    modelName = "gpt-5.6-terra",
+    outputSchema,
+    { signal, outputZodSchema } = {},
+  ) {
     if (!this.apiKey) throw new Error("OPENAI_API_KEY is not set");
     const structuredOutputSchema = outputSchema
-      ? createOpenAIStrictSchema(outputSchema, null)
+      ? createOpenAIStrictSchema(outputSchema, outputZodSchema ?? null)
       : openAIReconstructionJsonSchema;
 
     const format = {
@@ -594,10 +599,17 @@ class OpenAIReconstructionProvider {
       throw error;
     }
 
+    const recoveredResponse = recoverJson(outputText);
+    const normalisedResponse = outputSchema && !outputZodSchema
+      ? recoveredResponse
+      : normaliseOpenAITransportResponse(
+          recoveredResponse,
+          outputZodSchema ?? reconstructionV2Schema,
+          outputSchema ?? reconstructionJsonSchema,
+        );
+
     return {
-      response: outputSchema
-        ? recoverJson(outputText)
-        : normaliseOpenAITransportResponse(recoverJson(outputText)),
+      response: normalisedResponse,
       providerApiPath: "/v1/responses",
     };
   }