diff --git a/rewind/clip.py b/rewind/clip.py
index d7831ce..0d18b55 100755
--- a/rewind/clip.py
+++ b/rewind/clip.py
@@ -4,20 +4,12 @@ from rewind.video import combine_last_x_ts_files
 import obsws_python as obs
 import sys, argparse
 
-def start_recording(con):
-    con.start_record()
-    print("Started recording")
-
-def stop_recording(con):
-    con.stop_record()
-    print("Stopped recording")
-
-def create_recording(seconds):
+def create_recording(seconds: int) -> None:
     output_file_name = f"{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}.mp4"
     combine_last_x_ts_files(seconds, output_file_name)
     print(f"Created clip: {output_file_name}")
 
-def build_parser():
+def build_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(
         prog="rewind",
         description="Control OBS recording and create instant clips",
@@ -25,8 +17,6 @@ def build_parser():
 
     sub = parser.add_subparsers(dest="command", required=True)
 
-    sub.add_parser("start", help="Start OBS recording")
-    sub.add_parser("stop", help="Stop OBS recording")
     save = sub.add_parser("save", help="Save a section from the current recording")
     save.add_argument(
         "-s", "--seconds",
@@ -37,7 +27,7 @@ def build_parser():
 
     return parser
 
-def main(argv=None):
+def main(argv=None) -> int:
     parser = build_parser()
     args = parser.parse_args(argv)
 
@@ -46,7 +36,7 @@ def main(argv=None):
     else:
         parser.error("Unknown command")
 
-
+    return 0
 
 if __name__ == "__main__":
     sys.exit(main())
\ No newline at end of file
diff --git a/rewind/paths.py b/rewind/paths.py
index a4c42f0..c681755 100644
--- a/rewind/paths.py
+++ b/rewind/paths.py
@@ -18,7 +18,7 @@ def load_state() -> dict:
     with get_state_file_path().open() as f:
         return json.load(f)
 
-def write_state(state: dict):
+def write_state(state: dict) -> None:
     tmp = get_state_file_path().with_suffix(".tmp")
     with tmp.open("w") as f:
         json.dump(state, f, indent=2)
diff --git a/rewind/service.py b/rewind/service.py
index c911ec2..f597a6a 100755
--- a/rewind/service.py
+++ b/rewind/service.py
@@ -4,7 +4,6 @@ import datetime
 import time
 import obsws_python as obs
 import subprocess
-import json
 
 from rewind.video import get_duration
 from rewind.paths import load_state, write_state
@@ -23,15 +22,15 @@ def open_obs_connection() -> obs.ReqClient | None:
         print("Could not connect to OBS. Is it running and is the WebSocket server enabled?")
         return None
 
-def start_recording(con):
+def start_recording(con: obs.ReqClient) -> None:
     con.start_record()
     print("Started recording")
 
-def stop_recording(con):
+def stop_recording(con: obs.ReqClient) -> None:
     con.stop_record()
     print("Stopped recording")
 
-def cleanup_old_files(directory, max_age_seconds):
+def cleanup_old_files(directory: str, max_age_seconds: int) -> None:
     for filename in os.listdir(directory):
         file_path = os.path.join(directory, filename)
         if os.path.isfile(file_path):
@@ -41,11 +40,11 @@ def cleanup_old_files(directory, max_age_seconds):
                 print(f"Removed old file: {file_path}")
 
 
-def create_state_file():
+def create_state_file() -> None:
     state = {"files": []}
     write_state(state)
 
-def add_file_to_state(file_path):
+def add_file_to_state(file_path: str) -> None:
     state = load_state()
     files = state.get("files", [])
 
@@ -62,7 +61,7 @@ def add_file_to_state(file_path):
     state["files"] = files
     write_state(state)
 
-def main():
+def main() -> None:
     open_obs()
     time.sleep(5)
     con = open_obs_connection()