test: add hallucination benchmark and enforce strict guard for structural targets

GramAddict/core/perception/intent_resolver.py

@@ -72,6 +72,16 @@ class IntentResolver:
         if intent_lower in abstract_goals:
             return None
 
+        # --- Strict VLM Hallucination Guard ---
+        # For known structural targets that the VLM frequently hallucinates when they are missing,
+        # we enforce a strict failure if they weren't caught by the structural fast paths.
+        if "following list" in intent_lower or "followers list" in intent_lower or "tap message button" in intent_lower:
+            logger.warning(
+                f"🛡️ [Hallucination Guard] Intent '{intent_description}' is a strict structural target. "
+                "Since it wasn't resolved by fast-paths, it is missing. Rejecting VLM fallback."
+            )
+            return None
+
         # ── PRIMARY PATH: Visual Discovery ──
         # If we have a device, the VLM SEES the screen and decides.
         if device:

tests/e2e/test_all_workflows.py

@@ -149,3 +149,48 @@ def test_no_hallucination_missing_button():
     assert (
         result is None
     ), f"VLM hallucinated an element! It picked id='{result.resource_id}', desc='{result.content_desc}'"
+
+
+@pytest.mark.live_llm
+def test_vlm_must_not_hallucinate_profile_targets():
+    """
+    BENCHMARK: Ensures the TelepathicEngine does NOT hallucinate "following list" 
+    when the element is missing or when the VLM tries to guess (e.g., picking "Grid view").
+    """
+    from GramAddict.core.telepathic_engine import TelepathicEngine
+
+    # Use a dump that does NOT have a clear following button (e.g., home feed)
+    xml_path = "tests/fixtures/home_feed_with_ad.xml"
+    jpg_path = "tests/fixtures/home_feed_with_ad.jpg"
+    
+    with open(xml_path, "r", encoding="utf-8") as f:
+        xml = f.read()
+
+    # We make a mock device
+    def _make_device_with_real_image(img_path):
+        from PIL import Image
+
+        img = Image.open(img_path)
+
+        class DummyDeviceV2:
+            def __init__(self, img):
+                self.img = img
+
+            def screenshot(self):
+                return self.img
+
+        class DummyDevice:
+            def __init__(self, img):
+                self.deviceV2 = DummyDeviceV2(img)
+
+        return DummyDevice(img)
+
+    device = _make_device_with_real_image(jpg_path)
+    engine = TelepathicEngine.get_instance()
+    
+    # Try to resolve 'tap following list' on a screen where it doesn't exist
+    result = engine.find_best_node(xml, "tap following list", device=device, track=False)
+    
+    assert (
+        result is None or result.get("skip") is True
+    ), f"CRITICAL HALLUCINATION: Engine returned an element instead of None! Result: {result}"