diff --git a/scripts/sync_tandem_events.py b/scripts/sync_tandem_events.py
new file mode 100755
index 0000000..063a7d0
--- /dev/null
+++ b/scripts/sync_tandem_events.py
@@ -0,0 +1,225 @@
+#!/usr/bin/env python3
+"""
+Sync event definitions from Tandem's official webapp and regenerate event classes.
+
+Extracts the complete events.json from the JSON.parse() statement embedded in
+Tandem's reports module JavaScript, updates local events.json, and regenerates
+events.py with all event class definitions.
+
+Usage:
+    python3 scripts/sync_tandem_events.py [--output FILE] <URL>
+
+Example:
+    python3 scripts/sync_tandem_events.py \\
+      https://modules.us.tandemdiabetes.com/webapp/modules/reports-module/v1.8.0/2451.97042bc1.chunk.js
+"""
+
+import sys
+import json
+import subprocess
+import requests
+from pathlib import Path
+
+
+DEFAULT_EVENTS_FILE = "tconnectsync/eventparser/events.json"
+DEFAULT_GENERATOR = "build_events.py"
+
+
+def fetch_module(url):
+    """Fetch the minified JavaScript module from Tandem."""
+    print(f"Fetching Tandem module...", file=sys.stderr)
+    response = requests.get(url, timeout=30)
+    response.raise_for_status()
+    content = response.text
+    print(f"Fetched {len(content):,} bytes", file=sys.stderr)
+    return content
+
+
+def extract_events_json_from_parse(js_content):
+    """
+    Extract the complete events.json from the JSON.parse() statement.
+
+    Finds: JSON.parse('{"events":{...}}')
+    And returns the parsed events dictionary.
+    """
+    start = js_content.find("JSON.parse('")
+    if start < 0:
+        return None
+
+    start += len("JSON.parse('")
+
+    # Find the matching closing brace
+    brace_count = 0
+    end = start
+    escape_next = False
+
+    for i in range(start, len(js_content)):
+        char = js_content[i]
+
+        if escape_next:
+            escape_next = False
+            continue
+
+        if char == '\\':
+            escape_next = True
+            continue
+
+        if char == '{':
+            brace_count += 1
+        elif char == '}':
+            brace_count -= 1
+            if brace_count == 0:
+                end = i + 1
+                break
+
+    if brace_count != 0:
+        return None
+
+    json_str = js_content[start:end]
+
+    # Unescape the string
+    json_str = json_str.replace('\\"', '"')
+
+    try:
+        return json.loads(json_str)
+    except json.JSONDecodeError:
+        return None
+
+
+def load_existing_events(filepath):
+    """Load the existing events.json file."""
+    if not Path(filepath).exists():
+        return {"events": {}}
+
+    try:
+        with open(filepath, 'r') as f:
+            data = json.load(f)
+            print(f"Loaded {len(data.get('events', {}))} existing events", file=sys.stderr)
+            return data
+    except Exception as e:
+        print(f"Warning: Could not load existing events.json: {e}", file=sys.stderr)
+        return {"events": {}}
+
+
+def merge_events(existing_data, extracted_data):
+    """
+    Merge extracted events with existing events.
+
+    Keeps all existing events and updates/adds with extracted ones.
+    """
+    existing = existing_data.get('events', {})
+    extracted = extracted_data.get('events', {})
+
+    before_count = len(existing)
+
+    # Add/update extracted events
+    existing.update(extracted)
+
+    after_count = len(existing)
+    added = after_count - before_count
+
+    if added > 0:
+        print(f"Added {added} new events from Tandem module", file=sys.stderr)
+    else:
+        print(f"Updated {len(extracted)} events from Tandem module", file=sys.stderr)
+
+    return existing_data
+
+
+def write_events_file(filepath, data):
+    """Write events.json with proper formatting."""
+    if 'events' in data:
+        data['events'] = {
+            k: data['events'][k]
+            for k in sorted(data['events'].keys(), key=lambda x: int(x))
+        }
+
+    filepath = Path(filepath)
+    filepath.parent.mkdir(parents=True, exist_ok=True)
+
+    with open(filepath, 'w') as f:
+        json.dump(data, f, indent=2)
+
+    print(f"Wrote {len(data.get('events', {}))} events to {filepath}", file=sys.stderr)
+
+
+def regenerate_events_py(events_json_path, generator_name):
+    """Regenerate events.py from updated events.json."""
+    events_dir = Path(events_json_path).parent
+    generator_path = events_dir / generator_name
+
+    if not generator_path.exists():
+        print(f"⚠ Generator not found at {generator_path}", file=sys.stderr)
+        return False
+
+    print(f"Regenerating events.py...", file=sys.stderr)
+
+    try:
+        result = subprocess.run(
+            [sys.executable, generator_name],
+            cwd=str(events_dir),
+            capture_output=True,
+            text=True,
+            timeout=30
+        )
+
+        if result.returncode == 0:
+            # Write generated code to events.py
+            events_py = events_dir / 'events.py'
+            events_py.write_text(result.stdout)
+            print(f"✓ events.py regenerated ({len(result.stdout):,} bytes)", file=sys.stderr)
+            return True
+        else:
+            print(f"✗ Generator failed: {result.stderr}", file=sys.stderr)
+            return False
+
+    except subprocess.TimeoutExpired:
+        print("✗ Generator timed out", file=sys.stderr)
+        return False
+    except Exception as e:
+        print(f"✗ Error running generator: {e}", file=sys.stderr)
+        return False
+
+
+def main():
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        description='Sync event definitions from Tandem and regenerate events.py'
+    )
+    parser.add_argument('url', help='URL to Tandem JavaScript module')
+    parser.add_argument('--output', default=DEFAULT_EVENTS_FILE, help='Output events.json path')
+    parser.add_argument('--no-generate', action='store_true', help='Skip events.py regeneration')
+
+    args = parser.parse_args()
+
+    try:
+        js_content = fetch_module(args.url)
+
+        extracted_data = extract_events_json_from_parse(js_content)
+        if not extracted_data:
+            print("✗ Could not extract events.json from Tandem module", file=sys.stderr)
+            sys.exit(1)
+
+        extracted_events = extracted_data.get('events', {})
+        print(f"✓ Extracted {len(extracted_events)} events from Tandem module", file=sys.stderr)
+
+        existing_data = load_existing_events(args.output)
+        merged_data = merge_events(existing_data, extracted_data)
+        write_events_file(args.output, merged_data)
+
+        if not args.no_generate:
+            regenerate_events_py(args.output, DEFAULT_GENERATOR)
+
+        print(f"\n✓ Done", file=sys.stderr)
+
+    except requests.exceptions.RequestException as e:
+        print(f"✗ Network error: {e}", file=sys.stderr)
+        sys.exit(1)
+    except Exception as e:
+        print(f"✗ Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/tconnectsync/eventparser/events.json b/tconnectsync/eventparser/events.json
index f937768..15e0290 100644
--- a/tconnectsync/eventparser/events.json
+++ b/tconnectsync/eventparser/events.json
@@ -2263,8 +2263,8 @@
                 "8": "EGV was successfully added to CGM subsystem array (e.g., not a duplicate)",
                 "9": "OMR reading type",
                 "11": "Sensor Type (see CGMTxType enum)",
-                "12": "Sensor Type (see CGMTxType enum) 2",
-                "13": "Sensor Type (see CGMTxType enum) 3"
+                "12": "Sensor Type (see CGMTxType enum)",
+                "13": "Sensor Type (see CGMTxType enum)"
               }
             ]
           ]
diff --git a/tconnectsync/eventparser/events.py b/tconnectsync/eventparser/events.py
index 71348c5..e567d24 100644
--- a/tconnectsync/eventparser/events.py
+++ b/tconnectsync/eventparser/events.py
@@ -5413,8 +5413,8 @@ class LidCgmDataFsl3(BaseEvent):
         "8": "EGV was successfully added to CGM subsystem array (e.g., not a duplicate)",
         "9": "OMR reading type",
         "11": "Sensor Type (see CGMTxType enum)",
-        "12": "Sensor Type (see CGMTxType enum) 2",
-        "13": "Sensor Type (see CGMTxType enum) 3"
+        "12": "Sensor Type (see CGMTxType enum)",
+        "13": "Sensor Type (see CGMTxType enum)"
     }
 
     class EgvinfobitmaskBitmask(IntFlag):
@@ -5426,9 +5426,9 @@ class LidCgmDataFsl3(BaseEvent):
         ValidAlgstateAlgstateIs100 = 2**7
         EgvWasSuccessfullyAddedToCgmSubsystemArrayE = 2**8
         OmrReadingType = 2**9
-        SensorTypeSeeCgmtxtypeEnum = 2**11
-        SensorTypeSeeCgmtxtypeEnum2 = 2**12
-        SensorTypeSeeCgmtxtypeEnum3 = 2**13
+        SensorTypeSeeCgmtxtypeEnum_11 = 2**11
+        SensorTypeSeeCgmtxtypeEnum_12 = 2**12
+        SensorTypeSeeCgmtxtypeEnum_13 = 2**13
 
     @property
     def egvInfoBitmask(self):