diff --git a/api/analyzers/csharp/__init__.py b/api/analyzers/csharp/__init__.py
index e69de29..8b13789 100644
--- a/api/analyzers/csharp/__init__.py
+++ b/api/analyzers/csharp/__init__.py
@@ -0,0 +1 @@
+
diff --git a/api/entities/entity.py b/api/entities/entity.py
index 77f1cc9..fd4948b 100644
--- a/api/entities/entity.py
+++ b/api/entities/entity.py
@@ -28,4 +28,4 @@ def resolved_symbol(self, f: Callable[[str, Node], list[Self]]):
         for key, symbols in self.symbols.items():
             for symbol in symbols:
                 for resolved_symbol in f(key, symbol.symbol):
-                    symbol.add_resolve_symbol(resolved_symbol)
\ No newline at end of file
+                    symbol.add_resolve_symbol(resolved_symbol)
diff --git a/api/index.py b/api/index.py
index 354f5c6..16fc57e 100644
--- a/api/index.py
+++ b/api/index.py
@@ -517,4 +517,4 @@ def list_commits():
         'commits': commits
     }
 
-    return jsonify(response), 200
\ No newline at end of file
+    return jsonify(response), 200
diff --git a/api/llm.py b/api/llm.py
index 8c3330e..f324eca 100644
--- a/api/llm.py
+++ b/api/llm.py
@@ -264,4 +264,4 @@ def ask(repo_name: str, question: str) -> str:
     response = chat.send_message(question)
     logging.debug(f"Response: {response}")
     print(f"Response: {response['response']}")
-    return response['response']
\ No newline at end of file
+    return response['response']
diff --git a/api/prompts.py b/api/prompts.py
index aeaaf50..e8b4b3c 100644
--- a/api/prompts.py
+++ b/api/prompts.py
@@ -110,4 +110,4 @@
 
 **Question:** {question}
 
-**Your helpful answer:**"""
\ No newline at end of file
+**Your helpful answer:**"""
diff --git a/tests/test_api_trailing_newlines.py b/tests/test_api_trailing_newlines.py
new file mode 100644
index 0000000..c4464a3
--- /dev/null
+++ b/tests/test_api_trailing_newlines.py
@@ -0,0 +1,20 @@
+from pathlib import Path
+
+
+API_FILES_WITH_REQUIRED_TRAILING_NEWLINE = [
+    "api/analyzers/csharp/__init__.py",
+    "api/entities/entity.py",
+    "api/index.py",
+    "api/llm.py",
+    "api/prompts.py",
+]
+
+
+def test_reported_api_files_end_with_trailing_newlines():
+    repo_root = Path(__file__).resolve().parent.parent
+
+    for relative_path in API_FILES_WITH_REQUIRED_TRAILING_NEWLINE:
+        file_path = repo_root / relative_path
+        assert file_path.read_bytes().endswith(b"\n"), (
+            f"{relative_path} must end with a trailing newline"
+        )