Build extensible agent harness with interactive chat loop

src/tools/registry.ts

@@ -0,0 +1,24 @@
+import type { ToolDefinition } from "../types.js";
+import type { EventBus } from "../events.js";
+
+export class ToolRegistry {
+  private readonly tools = new Map<string, ToolDefinition<any>>();
+
+  constructor(private readonly events: EventBus) {}
+
+  async register(tool: ToolDefinition<any>): Promise<void> {
+    if (this.tools.has(tool.name)) {
+      throw new Error(`Tool already registered: ${tool.name}`);
+    }
+    this.tools.set(tool.name, tool);
+    await this.events.emit("tool.registered", { tool: tool.name });
+  }
+
+  list(): ToolDefinition<any>[] {
+    return [...this.tools.values()];
+  }
+
+  get(name: string): ToolDefinition<any> | undefined {
+    return this.tools.get(name);
+  }
+}