Fix: Properly extend ToolHandler abstract class

- Use super() constructor with options and schema
- Implement protected handle() method instead of execute()
- Define proper TypeScript types with z.infer
- Fixes compilation errors with ToolHandler interface

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/tools/builtin/messaging.ts

@@ -1,4 +1,4 @@
-import { ToolHandler } from '../base/ToolHandler';
+import { ToolHandler, ToolContext } from '../base/ToolHandler';
 import { NatsClient } from '../../nats/NatsClient';
 import { z } from 'zod';
 
@@ -11,22 +11,33 @@ function detectRole(): string {
   return 'unknown';
 }
 
-export class SendMessageTool extends ToolHandler {
-  name = 'send_message';
-  description = 'Send real-time message to another developer via NATS';
-
-  schema = z.object({
-    to: z.enum(['admin-dev', 'api-dev', 'web-dev']).describe('Recipient role'),
-    subject: z.string().describe('Message subject/title'),
-    message: z.string().describe('Message content'),
-    data: z.record(z.any()).optional().describe('Optional structured data'),
+// Schemas
+const SendMessageSchema = z.object({
+  to: z.enum(['admin-dev', 'api-dev', 'web-dev']),
+  subject: z.string(),
+  message: z.string(),
+  data: z.record(z.any()).optional(),
 });
 
+const ReceiveMessagesSchema = z.object({
+  limit: z.number().default(10),
+});
+
+type SendMessageInput = z.infer<typeof SendMessageSchema>;
+type ReceiveMessagesInput = z.infer<typeof ReceiveMessagesSchema>;
+
+export class SendMessageTool extends ToolHandler<SendMessageInput, any> {
   constructor(private natsClient: NatsClient) {
-    super();
+    super(
+      {
+        name: 'send_message',
+        description: 'Send real-time message to another developer via NATS',
+      },
+      SendMessageSchema,
+    );
   }
 
-  async execute(input: any): Promise<any> {
+  protected async handle(input: SendMessageInput, _context: ToolContext): Promise<any> {
     const { to, subject, message, data } = input;
     const from = detectRole();
 
@@ -52,18 +63,17 @@ export class SendMessageTool extends ToolHandler {
   }
 }
 
-export class ReceiveMessagesTool extends ToolHandler {
-  name = 'receive_messages';
-  description = 'Receive real-time messages from other developers via NATS';
-
-  schema = z.object({
-    limit: z.number().default(10).describe('Maximum number of messages to return'),
-  });
-
+export class ReceiveMessagesTool extends ToolHandler<ReceiveMessagesInput, any> {
   private messages: any[] = [];
 
   constructor(private natsClient: NatsClient) {
-    super();
+    super(
+      {
+        name: 'receive_messages',
+        description: 'Receive real-time messages from other developers via NATS',
+      },
+      ReceiveMessagesSchema,
+    );
     this.setupSubscription();
   }
 
@@ -77,7 +87,7 @@ export class ReceiveMessagesTool extends ToolHandler {
     });
   }
 
-  async execute(input: any): Promise<any> {
+  protected async handle(input: ReceiveMessagesInput, _context: ToolContext): Promise<any> {
     const limit = input.limit || 10;
     const recentMessages = this.messages.slice(-limit);