diff --git a/GramAddict/core/navigation/brain.py b/GramAddict/core/navigation/brain.py
index f2ed9fa..93da515 100644
--- a/GramAddict/core/navigation/brain.py
+++ b/GramAddict/core/navigation/brain.py
@@ -29,11 +29,13 @@ def ask_brain_for_action(
         prompt += f"Context: {context}\n"
 
     prompt += (
-        "CRITICAL INSTRUCTIONS:\n"
-        "1. If your goal requires an element (like 'following list') that you previously tried but failed to find, it is highly likely hidden off-screen.\n"
-        "2. If you haven't scrolled yet, you MUST choose to 'scroll down' or 'scroll up' to reveal more of the screen.\n"
-        "3. Only choose 'press back' or 'tap home tab' if you are completely trapped or in the wrong section entirely.\n"
-        "4. DO NOT hallucinate actions. Reply ONLY with the exact string from the available actions list."
+        "INSTRUCTIONS:\n"
+        "1. Reason about where you are. Consider the screen type and what actions make sense on that screen.\n"
+        "2. If the goal requires navigating away from the current screen, choose the action that moves you closest to the goal.\n"
+        "3. 'scroll down' reveals more UI elements on scrollable screens (feeds, profiles, lists). Some screens like stories or modals are NOT scrollable.\n"
+        "4. 'press back' exits the current screen and returns to the previous one. Use it when you are on a screen that doesn't lead to your goal.\n"
+        "5. DO NOT hallucinate actions. Reply ONLY with the exact string from the available actions list.\n"
+        "6. Reply with ONLY the action string, nothing else."
     )
 
     try:
diff --git a/GramAddict/core/perception/screen_identity.py b/GramAddict/core/perception/screen_identity.py
index 3dd0df3..138f851 100644
--- a/GramAddict/core/perception/screen_identity.py
+++ b/GramAddict/core/perception/screen_identity.py
@@ -195,6 +195,16 @@ class ScreenIdentity:
         if "row_feed_button_like" in ids and "row_feed_photo_profile_name" in ids and not selected_tab:
             return ScreenType.POST_DETAIL
 
+        # Story view structural markers — present in full-screen story viewer.
+        # Stories hide the navigation tab bar, so selected_tab is always None.
+        # Must be checked BEFORE tab-based fallbacks to prevent UNKNOWN classification.
+        STORY_MARKERS = ("reel_viewer_media_layout", "reel_viewer_header", "reel_viewer_progress_bar")
+        if any(marker in ids for marker in STORY_MARKERS):
+            return ScreenType.STORY_VIEW
+        # Fallback: content-desc "Like Story" or "Send story" confirms story context
+        if "like story" in desc_lower or "send story" in desc_lower:
+            return ScreenType.STORY_VIEW
+
         if selected_tab == "feed_tab":
             return ScreenType.HOME_FEED
         if selected_tab == "clips_tab":
diff --git a/tests/e2e/test_engine_perception.py b/tests/e2e/test_engine_perception.py
index f599d90..a6d3d09 100644
--- a/tests/e2e/test_engine_perception.py
+++ b/tests/e2e/test_engine_perception.py
@@ -363,3 +363,4 @@ class TestStoryViewDetection:
         assert len(tab_actions) == 0, (
             f"Story view should have NO tab navigation, but found: {tab_actions}"
         )
+