feat(cli): add response guardrails and grounded followup re-anchoring

tests/test_ai.py

@@ -4,7 +4,7 @@ from unittest.mock import MagicMock, patch
 
 from tai.ai_client import DEFAULT_AI_HOST, DEFAULT_MODEL, AIClient, AIConfig
 from tai.collectors import CollectedItem, CollectionReport
-from tai.prompt_builder import build_system_prompt, build_user_message
+from tai.prompt_builder import build_followup_message, build_system_prompt, build_user_message
 from tai.ssh_client import SSHCommandResult
 
 # ---------------------------------------------------------------------------
@@ -218,3 +218,16 @@ def test_build_user_message_handles_no_output() -> None:
     report = _make_report([("empty", "cat /nonexistent", 1, "", "")])
     msg = build_user_message("test", report)
     assert "no output" in msg
+
+
+def test_build_followup_message_includes_question_context() -> None:
+    report = _make_report([("kernel", "uname -a", 0, "Linux web01", "")])
+    msg = build_followup_message(
+        "nginx is failing",
+        report,
+        "what should I check next?",
+        ["is nginx running?", "show me logs"],
+    )
+    assert "Current follow-up question" in msg
+    assert "what should I check next?" in msg
+    assert "Recent user follow-up questions" in msg