Upgrade to Zod v4 (#2605)

Co-authored-by: GitHub Action <action@github.com>

packages/opencode/src/provider/transform.ts

@@ -1,5 +1,6 @@
 import type { ModelMessage } from "ai"
 import { unique } from "remeda"
+import type { JSONSchema } from "zod/v4/core"
 
 export namespace ProviderTransform {
   function normalizeToolCallIds(msgs: ModelMessage[]): ModelMessage[] {
@@ -112,4 +113,29 @@ export namespace ProviderTransform {
     }
     return outputLimit
   }
+
+  export function schema(_providerID: string, _modelID: string, schema: JSONSchema.BaseSchema) {
+    /*
+    if (["openai", "azure"].includes(providerID)) {
+      if (schema.type === "object" && schema.properties) {
+        for (const [key, value] of Object.entries(schema.properties)) {
+          if (schema.required?.includes(key)) continue
+          schema.properties[key] = {
+            anyOf: [
+              value as JSONSchema.JSONSchema,
+              {
+                type: "null",
+              },
+            ],
+          }
+        }
+      }
+    }
+
+    if (providerID === "google") {
+    }
+    */
+
+    return schema
+  }
 }