Remove internal Zod schemas (#26974)

packages/opencode/src/provider/transform.ts

@@ -1,7 +1,6 @@
 import type { ModelMessage, ToolResultPart } from "ai"
 import { mergeDeep, unique } from "remeda"
 import type { JSONSchema7 } from "@ai-sdk/provider"
-import type { JSONSchema } from "zod/v4/core"
 import type * as Provider from "./provider"
 import type * as ModelsDev from "./models"
 import { iife } from "@/util/iife"
@@ -1281,7 +1280,7 @@ export function maxOutputTokens(model: Provider.Model): number {
   return Math.min(model.limit.output, OUTPUT_TOKEN_MAX) || OUTPUT_TOKEN_MAX
 }
 
-export function schema(model: Provider.Model, schema: JSONSchema.BaseSchema | JSONSchema7): JSONSchema7 {
+export function schema(model: Provider.Model, schema: JSONSchema7): JSONSchema7 {
   /*
   if (["openai", "azure"].includes(providerID)) {
     if (schema.type === "object" && schema.properties) {
@@ -1312,7 +1311,10 @@ export function schema(model: Provider.Model, schema: JSONSchema.BaseSchema | JS
       return result
     }
 
-    schema = sanitizeMoonshot(schema) as JSONSchema.BaseSchema | JSONSchema7
+    const sanitized = sanitizeMoonshot(schema)
+    if (typeof sanitized === "object" && sanitized !== null && !Array.isArray(sanitized)) {
+      schema = sanitized
+    }
   }
 
   // Convert integer enums to string enums for Google/Gemini
@@ -1394,7 +1396,7 @@ export function schema(model: Provider.Model, schema: JSONSchema.BaseSchema | JS
     schema = sanitizeGemini(schema)
   }
 
-  return schema as JSONSchema7
+  return schema
 }
 
 export * as ProviderTransform from "./transform"