diff --git a/graphify/detect.py b/graphify/detect.py
index e9dc701f0..d30b4918b 100644
--- a/graphify/detect.py
+++ b/graphify/detect.py
@@ -18,7 +18,7 @@ class FileType(str, Enum):
 
 _MANIFEST_PATH = "graphify-out/manifest.json"
 
-CODE_EXTENSIONS = {'.py', '.ts', '.js', '.jsx', '.tsx', '.go', '.rs', '.java', '.cpp', '.cc', '.cxx', '.c', '.h', '.hpp', '.rb', '.swift', '.kt', '.kts', '.cs', '.scala', '.php', '.lua', '.toc', '.zig', '.ps1', '.ex', '.exs', '.m', '.mm', '.jl'}
+CODE_EXTENSIONS = {'.py', '.ts', '.js', '.jsx', '.tsx', '.go', '.rs', '.java', '.cpp', '.cc', '.cxx', '.c', '.h', '.hpp', '.rb', '.swift', '.kt', '.kts', '.cs', '.scala', '.php', '.lua', '.toc', '.zig', '.ps1', '.ex', '.exs', '.m', '.mm', '.jl', '.gd'}
 DOC_EXTENSIONS = {'.md', '.txt', '.rst'}
 PAPER_EXTENSIONS = {'.pdf'}
 IMAGE_EXTENSIONS = {'.png', '.jpg', '.jpeg', '.gif', '.webp', '.svg'}
diff --git a/graphify/extract.py b/graphify/extract.py
index 65e62c646..1ddc36245 100644
--- a/graphify/extract.py
+++ b/graphify/extract.py
@@ -2677,6 +2677,7 @@ def collect_files(target: Path, *, follow_symlinks: bool = False) -> list[Path]:
         ".rb", ".cs", ".kt", ".kts", ".scala", ".php", ".swift",
         ".lua", ".toc", ".zig", ".ps1",
         ".m", ".mm",
+        ".gd",
     }
     if not follow_symlinks:
         results: list[Path] = []
diff --git a/tests/test_detect.py b/tests/test_detect.py
index ed43fea2b..fb6c85904 100644
--- a/tests/test_detect.py
+++ b/tests/test_detect.py
@@ -9,6 +9,11 @@ def test_classify_python():
 def test_classify_typescript():
     assert classify_file(Path("bar.ts")) == FileType.CODE
 
+def test_classify_godot_gd():
+    # GDScript files (.gd) are Godot engine scripts and should be treated as code
+    assert classify_file(Path("Player.gd")) == FileType.CODE
+    assert classify_file(Path("scenes/Enemy.gd")) == FileType.CODE
+
 def test_classify_markdown():
     assert classify_file(Path("README.md")) == FileType.DOCUMENT
 
diff --git a/tests/test_extract.py b/tests/test_extract.py
index 3d5b9f530..9e22285b3 100644
--- a/tests/test_extract.py
+++ b/tests/test_extract.py
@@ -62,7 +62,7 @@ def test_collect_files_from_dir():
                  ".java", ".c", ".cpp", ".cc", ".cxx", ".rb",
                  ".cs", ".kt", ".kts", ".scala", ".php", ".h", ".hpp",
                  ".swift", ".lua", ".toc", ".zig", ".ps1", ".ex", ".exs",
-                 ".m", ".mm"}
+                 ".m", ".mm", ".gd"}
     assert all(f.suffix in supported for f in files)
     assert len(files) > 0
 
@@ -73,6 +73,15 @@ def test_collect_files_skips_hidden():
         assert not any(part.startswith(".") for part in f.parts)
 
 
+def test_collect_files_picks_up_godot_gd(tmp_path):
+    # Regression test for #535 - Godot .gd script files were not being
+    # picked up by collect_files() after v0.50.0 upgrade.
+    gd_file = tmp_path / "Player.gd"
+    gd_file.write_text("extends Node\n\nfunc _ready():\n    pass\n")
+    files = collect_files(tmp_path)
+    assert gd_file in files
+
+
 def test_collect_files_follows_symlinked_directory(tmp_path):
     real_dir = tmp_path / "real_src"
     real_dir.mkdir()