feat: add interactive ask-user extension

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

@@ -157,6 +157,15 @@ 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: "user-interaction",
+    title: "Interactive user questions",
+    summary: "Pause the agent and collect one or more structured decisions from the user in the TUI.",
+    useWhen: ["A missing requirement, preference, confirmation, or choice must come directly from the user before continuing"],
+    avoidWhen: ["The user's direct messages already provide the answer, or the task can proceed without another decision"],
+    keywords: ["ask", "question", "clarify", "choice", "preference", "提问", "澄清", "选择", "确认"],
+    tools: ["ask_user_question"],
+  },
   {
     id: "mcp-management",
     title: "MCP management",