Wire agent.delegate into TUI tool registry

src/tools/builtin/agent-delegate.test.ts

@@ -2,7 +2,6 @@ import { describe, it, expect, vi, beforeEach } from 'vitest';
 import { createAgentDelegateTool } from './agent-delegate.js';
 import type { AgentDelegateDeps } from './agent-delegate.js';
 import type { AgentConfigRegistry } from '../../agents/registry.js';
-import type { AgentOrchestrator } from '../../backends/native/orchestrator.js';
 
 function createMockRegistry(configs: Record<string, { systemPrompt?: string; modelTier?: string }>): AgentConfigRegistry {
   const entries = Object.entries(configs).map(([name, cfg]) => ({
@@ -17,19 +16,21 @@ function createMockRegistry(configs: Record<string, { systemPrompt?: string; mod
   } as unknown as AgentConfigRegistry;
 }
 
-function createMockOrchestrator(response?: { content: string; usage: { inputTokens: number; outputTokens: number }; tier: string }): AgentOrchestrator {
+function createMockOrchestrator(
+  response?: { content: string; usage: { inputTokens: number; outputTokens: number }; tier: 'fast' | 'default' | 'complex' | 'local' },
+): AgentDelegateDeps['orchestrator'] {
   return {
     delegate: vi.fn().mockResolvedValue(response ?? {
       content: 'Mock agent response',
       usage: { inputTokens: 100, outputTokens: 50 },
       tier: 'default',
     }),
-  } as unknown as AgentOrchestrator;
+  };
 }
 
 describe('agent.delegate tool', () => {
   let deps: AgentDelegateDeps;
-  let mockOrchestrator: AgentOrchestrator;
+  let mockOrchestrator: AgentDelegateDeps['orchestrator'];
 
   beforeEach(() => {
     mockOrchestrator = createMockOrchestrator();
@@ -127,7 +128,7 @@ describe('agent.delegate tool', () => {
   it('handles orchestrator errors gracefully', async () => {
     const failingOrchestrator = {
       delegate: vi.fn().mockRejectedValue(new Error('Model provider unavailable')),
-    } as unknown as AgentOrchestrator;
+    } as AgentDelegateDeps['orchestrator'];
 
     const tool = createAgentDelegateTool({ ...deps, orchestrator: failingOrchestrator });
     const result = await tool.execute({ agent: 'research', task: 'This will fail' });

src/tools/builtin/agent-delegate.ts

@@ -1,11 +1,24 @@
 import type { Tool, ToolResult } from '../types.js';
 import type { AgentConfigRegistry } from '../../agents/registry.js';
-import type { AgentOrchestrator } from '../../backends/native/orchestrator.js';
 import type { ModelTier } from '../../models/router.js';
+import type { TokenUsage } from '../../models/types.js';
+
+interface AgentDelegateRunner {
+  delegate(request: {
+    tier: ModelTier;
+    systemPrompt: string;
+    message: string;
+    maxTokens?: number;
+  }): Promise<{
+    content: string;
+    usage: TokenUsage;
+    tier: ModelTier;
+  }>;
+}
 
 export interface AgentDelegateDeps {
   registry: AgentConfigRegistry;
-  orchestrator: AgentOrchestrator;
+  orchestrator: AgentDelegateRunner;
 }
 
 /**