feat: remove search rerank

app/utils/tool-rendering.ts

@@ -27,7 +27,25 @@ export interface SearchSource {
     snippet: string;
 }
 
+export const readSearchWarnings = (value: unknown): { engine: string; reason: string }[] => {
+    if (typeof value !== "object" || value === null || !("warnings" in value) || !Array.isArray(value.warnings)) {
+        return [];
+    }
+    return value.warnings.flatMap((warning: unknown) => {
+        if (typeof warning !== "object" || warning === null
+            || !("engine" in warning) || typeof warning.engine !== "string"
+            || !("reason" in warning) || typeof warning.reason !== "string") {
+            return [];
+        }
+        return [{ engine: warning.engine, reason: warning.reason }];
+    });
+};
+
 export const readSearchSources = (value: unknown): SearchSource[] | null => {
+    // Older tool calls stored the results array directly.
+    if (typeof value === "object" && value !== null && "results" in value) {
+        value = value.results;
+    }
     if (!Array.isArray(value)) {
         return null;
     }