fix(code-mode): generalize failures and bound diagnostics

packages/core/tools/src/code-mode.ts

@@ -351,7 +351,11 @@ export function createRunCodeTool(registry: ToolRegistry, requireRuntime: () =>
         try {
           result = await runtime.run({
             program: args.code,
-            bindings: [{ global: 'tools', functions }],
+            bindings: [{
+              global: 'tools',
+              functions,
+              errorClass: { name: 'ToolCallError', memberNameProperty: 'toolName' },
+            }],
             signal: runController.signal,
           })
         } finally {

packages/core/tools/tests/code-mode.spec.ts

@@ -296,6 +296,10 @@ describe('mode-aware wire contribution', () => {
     const { ctx, runtime } = await setup({ mode: 'both' })
     registerEcho(ctx)
     runtime.behavior = (request) => {
+      expect(request.bindings[0]!.errorClass).toEqual({
+        name: 'ToolCallError',
+        memberNameProperty: 'toolName',
+      })
       const functions = request.bindings[0]!.functions
       return Promise.resolve({
         logs: [],