diff --git a/checks.py b/checks.py
new file mode 100644
index 0000000..cb3d9c7
--- /dev/null
+++ b/checks.py
@@ -0,0 +1,146 @@
+import os
+import re
+import json
+import subprocess
+import sys
+from datetime import datetime, timezone
+from copy import deepcopy
+
+# Regular expression pattern to match the lines in SUPPORTED.md
+regex = re.compile(r"\| ([^|]*) \| ([^|]*) \| ([^|]*) \| \[.*?\]\((.*?)\) \|")
+
+# Get a list of files for a given git command
+def git_files(command):
+    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    files = result.stdout.decode('utf-8').splitlines()
+    return [file for file in files if file.endswith('.json')]
+
+# Get a list of changes json files using git
+def get_changed_jsons():
+    commands = [
+        # ['git', 'diff', '--name-only'], # changed files
+        ['git', 'diff', '--cached', '--name-only'], # staged files
+        ['git', 'log', 'origin/main..HEAD', '--name-only', '--pretty=format:'] # comitted files
+    ]
+    changed_files = set()
+    for command in commands:
+        changed_files.update(git_files(command))
+    return list(changed_files)
+
+# Update header for a given json file
+def update_header(json_path, date_code):
+    try:
+        with open(json_path, "r", encoding="utf-8") as json_file:
+            data = json.load(json_file)
+
+        if isinstance(data, list) and data:
+            if "name" not in data[0]:
+                data.pop(0)
+
+            if data:
+                first_entry = data[0]
+                game_code = first_entry.get("gameCode", "")
+                last_updated = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M:%S")
+                new_entry = {
+                    "gameCode": game_code,
+                    "version": date_code,
+                    "lastUpdated": last_updated,
+                    "source": 'https://sp2x.two-torial.xyz/',
+                }
+                data.insert(0, new_entry)
+
+                for entry in data[1:]:
+                    entry.pop("dateCode", None)
+
+        with open(json_path, "w", encoding="utf-8") as json_file:
+            json.dump(data, json_file, indent=4, ensure_ascii=False)
+
+        print(f"'{os.path.relpath(json_path, 'patches/')}' - Updated header")
+    except Exception as e:
+        exit(e)
+
+# Cleanup all json files by batch-running jobs 
+def clean_json_files():
+    json_files = []
+    for filename in os.listdir("patches/"):
+        if filename.endswith('.json'):
+            filepath = os.path.join("patches/", filename)
+            with open(filepath, "r", encoding="utf-8") as json_file:
+                json_data = json.load(json_file)
+
+            # Remove redundance union entries
+            new_json_data = deepcopy(json_data)
+            for item in new_json_data:
+                if "type" in item:
+                    if item["type"] == "union":
+                        for patch in item["patches"]:
+                            if "type" in patch:
+                                del patch["type"]
+
+            if json_data != new_json_data:
+                # Only save changes and print if something was done
+                with open(filepath, "w", encoding="utf-8") as json_file:
+                    json.dump(new_json_data, json_file, indent=4)
+                print(f"'{filename}' - Cleaned up")
+                json_files.append(filepath)
+    return json_files
+
+# Run checks for json_files if specified, otherwise all changes files
+def check(json_files=None):
+    # if json_files is none: run clean_json_files and set json_files to its return value
+    json_files = json_files or clean_json_files()
+    # if there are still no json files, get changed jsons instead
+    if not json_files:
+        json_files = get_changed_jsons()
+        # exit if there's no changed files
+        if not json_files:
+            exit("Nothing to do")
+
+    count = 0
+    try:
+        # Open SUPPORTED.md
+        with open("SUPPORTED.md", "r", encoding="utf-8") as file:
+            # For each line
+            for line in file:
+                match = regex.search(line)
+                # If it matches a game info line 
+                if match:
+                    # Get the last group of the regex (json path) 
+                    json_path = match.group(4).strip()
+                    # For each path in json_files check if it matches the current line's json path
+                    if any(j_path in json_path for j_path in json_files):
+                        # if that's the case update its header and add 1 to count
+                        variant = match.group(1).strip()
+                        date_code = match.group(3).strip()
+                        # Add variant (ex 010) to datecode if present, otherwise keep datecode as is
+                        if "-" in variant:
+                            date_code = f"{date_code} ({variant.split('-')[1]})" 
+                        update_header(json_path, date_code)
+                        count += 1
+
+        # If nothing was done, exit early
+        if count == 0:
+            exit("Nothing to do")
+        return count
+    except Exception as e:
+        exit(f"Error processing files: {e}")
+
+if __name__ == "__main__":
+    if not os.path.exists('./SUPPORTED.md'):
+        exit("File 'SUPPORTED.md' not found")
+
+    if not os.path.exists('patches/'):
+        exit("Folder 'patches' not found")
+
+    len_args = len(sys.argv)
+    if len_args == 1:
+        count = check()
+    elif len_args == 2:
+        filepath = sys.argv[1]
+        if not os.path.exists(filepath):
+            exit(f"Invalid path '{filepath}'")
+        count = check([filepath])
+    else:
+        exit("Usage: python checks.py <(optional)json_name>")
+
+    print(f"\nUpdated {count} file(s)")
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