diff --git a/misc/scripts/compile-models.py b/misc/scripts/compile-models.py
new file mode 100755
index 00000000000..4e80703df98
--- /dev/null
+++ b/misc/scripts/compile-models.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+
+import sys
+from pathlib import Path
+import yaml
+
+def find_and_load_models(basedir, globs):
+    """Find and load all .yml files under the given directory."""
+    models = {}
+    for glob in globs:
+        for file_path in Path(basedir).rglob(glob):
+            with open(file_path, 'r') as f:
+                data = yaml.safe_load(f)
+                models[file_path] = data
+    return models
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: compile-models.py <output.yml>", file=sys.stderr)
+        sys.exit(1)
+    
+    # TODO: don't hard-code these
+    basedir = 'java/ql/lib'
+    globs = [
+        'ext/*.model.yml',
+        'ext/generated/**/*.model.yml',
+        'ext/experimental/*.model.yml',
+    ]
+    models = find_and_load_models(basedir, globs)
+
+    collected = {}
+    
+    print(f"Loaded {len(models)} .yml files")
+    for (file_path, data) in models.items():
+        for extension in data['extensions']:
+            pack = extension['addsTo']['pack']
+            extensible = extension['addsTo']['extensible']
+            if (pack, extensible) not in collected:
+                collected[(pack, extensible)] = []
+            collected[(pack, extensible)].extend(extension['data'])
+
+    print(f"Compiling")
+    compiled_model = {}
+    compiled_model['extensions'] = []
+    for (pack, extensible), data in collected.items():
+        extension = {
+            'addsTo': {
+                'pack': pack,
+                'extensible': extensible
+            },
+            'data': sorted(data)
+        }
+        compiled_model['extensions'].append(extension)       
+
+    output_file = sys.argv[1]
+    print(f"Writing compiled model to {output_file}")
+    with open(output_file, 'w') as f:
+        yaml.dump(compiled_model, f, encoding='utf-8', width=10000, default_flow_style=None)
+
+if __name__ == '__main__':
+    main()