feat: enable permission-aware subagents

pi-tool-search/extensions/bundle-groups.ts

@@ -121,6 +121,15 @@ export const BUNDLE_GROUP_DEFINITIONS: BundleGroupDefinition[] = [
     keywords: ["remember", "outcome", "lesson", "error", "记住", "反馈", "项目经验"],
     tools: ["hippo_remember", "hippo_outcome"],
   },
+  {
+    id: "subagents",
+    title: "Subagent orchestration",
+    summary: "Launch isolated subagents, collect background results, and steer running delegated work.",
+    useWhen: ["A bounded task benefits from an isolated specialist, background execution, or delegated follow-up"],
+    avoidWhen: ["The current agent can complete a small direct task without delegation overhead"],
+    keywords: ["subagent", "agent", "delegate", "background", "steer", "子代理", "委派", "后台"],
+    tools: ["Agent", "get_subagent_result", "steer_subagent"],
+  },
   {
     id: "mcp-management",
     title: "MCP management",