diff --git a/release-management/scripts/git-local-merge.py b/release-management/scripts/git-local-merge.py
index 3333f36..7d6bdeb 100644
--- a/release-management/scripts/git-local-merge.py
+++ b/release-management/scripts/git-local-merge.py
@@ -1,9 +1,14 @@
 #!/usr/bin/env python3
 from __future__ import annotations
 
+if __name__ != "__main__":
+    raise ImportError(f"{__name__} should not be used as a module.")
+
 import argparse
 import json
+import os
 import shutil
+import signal
 import subprocess
 import sys
 from typing import NoReturn
@@ -38,10 +43,25 @@ Merge pull request #{id} from {branch}
 
 
 def main() -> NoReturn:
-    parser = argparse.ArgumentParser(description="Locally merge multiple GitHub PRs.")
-    parser.add_argument("ids", nargs="+", help="PR ids to merge.")
+    parser = argparse.ArgumentParser(prog="git-local-merge", description="Locally merge multiple GitHub PRs.")
+    parser.add_argument("ids", nargs="*", help="PR ids to merge.", type=int)
+    parser.add_argument(
+        "-f",
+        "--file",
+        help="Path to a file containing PR ids.",
+        type=argparse.FileType(encoding="utf-8"),
+    )
     args = parser.parse_args()
 
+    ids: set[int] = set(args.ids)
+    if args.file:
+        try:
+            ids.update(int(id) for id in args.file.read().split())
+        except ValueError:
+            parser.error("File contained invalid int values.")
+    if not ids:
+        parser.error("No ids provided.")
+
     if subprocess.run(["git", "checkout"], stdout=subprocess.PIPE).returncode != 0:
         sys.exit(1)
 
@@ -61,14 +81,11 @@ def main() -> NoReturn:
     out = subprocess.run(["gh", "repo", "set-default", "--view"], capture_output=True)
     if out.stderr:
         subprocess.run(["gh", "repo", "set-default"])
-        out = subprocess.run(
-            ["gh", "repo", "set-default", "--view"], capture_output=True
-        )
+        out = subprocess.run(["gh", "repo", "set-default", "--view"], capture_output=True)
         if out.stderr:
             print("Failed to setup default remote repository!", file=sys.stderr)
             sys.exit(1)
 
-    ids = set([int(id) for id in args.ids])
     failed: set[int] = set()
     prs: list[PullRequestInfo] = []
 
@@ -81,9 +98,7 @@ def main() -> NoReturn:
             failed.add(id)
 
     for pr in prs:
-        subprocess.run(
-            ["gh", "pr", "checkout", str(pr.id), "--branch", pr.branch, "--force"]
-        )
+        subprocess.run(["gh", "pr", "checkout", str(pr.id), "--branch", pr.branch, "--force"])
     subprocess.run(["git", "checkout", BASE_BRANCH])
 
     for pr in prs:
@@ -98,5 +113,8 @@ def main() -> NoReturn:
     sys.exit(len(failed))
 
 
-if __name__ == "__main__":
+try:
     main()
+except KeyboardInterrupt:
+    signal.signal(signal.SIGINT, signal.SIG_DFL)
+    os.kill(os.getpid(), signal.SIGINT)