diff --git a/fix_activity37.py b/fix_activity37.py
deleted file mode 100644
index aefd95f..0000000
--- a/fix_activity37.py
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/usr/bin/env python3
-"""
-Fix activity37:
-1. Change 'close' bucket to NOT advance (retry same step)
-2. Keep 'off_topic' looping on final step, remove next_section_and_step from completion buckets
-"""
-import yaml
-
-def fix_activity37():
-    file_path = "research/activity37-programming-languages.yaml"
-
-    # Read original file
-    with open(file_path, 'r') as f:
-        activity = yaml.safe_load(f)
-
-    # Fix 1: Change ALL "close" transitions to stay on same step
-    for section in activity['sections']:
-        section_id = section['section_id']
-        for step in section['steps']:
-            step_id = step['step_id']
-            if 'transitions' in step and 'close' in step.get('buckets', []):
-                # Change 'close' to stay on same step (don't advance)
-                if 'close' in step['transitions']:
-                    step['transitions']['close']['next_section_and_step'] = f"{section_id}:{step_id}"
-
-    # Fix 2: For final step (conclusion:step_1), keep ONLY 'off_topic' looping
-    # Remove next_section_and_step from all other transitions to allow completion
-    for section in activity['sections']:
-        if section['section_id'] == 'conclusion':
-            for step in section['steps']:
-                if step['step_id'] == 'step_1':
-                    for bucket, transition in step['transitions'].items():
-                        # Remove next_section_and_step from all except off_topic
-                        if bucket != 'off_topic' and 'next_section_and_step' in transition:
-                            del transition['next_section_and_step']
-                    # Ensure off_topic loops (for validator to not consider it terminal)
-                    if 'off_topic' in step['transitions']:
-                        step['transitions']['off_topic']['next_section_and_step'] = 'conclusion:step_1'
-
-    # Write back with minimal formatting changes
-    with open(file_path, 'w') as f:
-        yaml.dump(activity, f, default_flow_style=False, sort_keys=False, width=1000, allow_unicode=True)
-
-    print(f"✅ Fixed {file_path}")
-    print("  - 'close' buckets now retry same step (don't advance)")
-    print("  - Final step can now complete (off_topic loops, others complete)")
-
-if __name__ == '__main__':
-    fix_activity37()