feat: add /research command with sub-agent delegation

src/daemon/routing.ts

@@ -590,6 +590,35 @@ export function createMessageRouter(deps: {
             return '';
           },
 
+          delegateAgent: async (agentName: string, task: string) => {
+            const target = agentName.trim();
+            const message = task.trim();
+            if (!target || !message) {
+              return 'Usage: /research <question or task>';
+            }
+            if (!deps.agentConfigRegistry) {
+              return 'No agent configurations are registered. Add agent_configs.research in config.';
+            }
+            const agentConfig = deps.agentConfigRegistry.get(target);
+            if (!agentConfig) {
+              const available = deps.agentConfigRegistry.list().map((c) => c.name);
+              return `Agent "${target}" not found. Available agents: ${available.length > 0 ? available.join(', ') : 'none'}`;
+            }
+
+            const tier: ModelTier = agentConfig.modelTier ?? 'default';
+            const systemPrompt = agentConfig.systemPrompt
+              ?? `You are a sub-agent named "${target}". Complete the assigned task concisely and accurately.`;
+
+            const result = await agent.delegate({
+              tier,
+              systemPrompt,
+              message,
+              maxTokens: 4096,
+            });
+
+            return `[Agent: ${target} | Tier: ${result.tier} | Tokens: ${result.usage.inputTokens}+${result.usage.outputTokens}]\n\n${result.content}`;
+          },
+
           getElevation: () => {
             const untilRaw = session.getConfig('elevation.until_ms');
             const reason = session.getConfig('elevation.reason') ?? '';