initial

app/filters/__init__.py

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+from .gitignore import GitignoreFilter, DEFAULT_PATTERNS
+
+__all__ = ['GitignoreFilter', 'DEFAULT_PATTERNS']

app/filters/gitignore.py

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+from pathlib import Path
+from typing import Set
+import fnmatch
+
+DEFAULT_PATTERNS = {
+    'node_modules/**', '__pycache__/**', '.git/**', 'build/**', 'dist/**',
+    '.cache/**', 'target/**', 'vendor/**', '.venv/**', 'venv/**',
+    '*.pyc', '*.pyo', '*.so', '*.dll', '*.dylib', '*.o', '*.a',
+    '.DS_Store', 'Thumbs.db', '.pytest_cache/**', '.tox/**',
+    '*.egg-info/**', '.mypy_cache/**', '.coverage', 'htmlcov/**',
+    '.gradle/**', 'bin/**', 'obj/**', '.vs/**', '.idea/**'
+}
+
+class GitignoreFilter:
+    def __init__(self, patterns: Set[str] = None):
+        self.patterns = patterns or DEFAULT_PATTERNS
+
+    def should_exclude(self, path: str) -> bool:
+        path_obj = Path(path)
+        for pattern in self.patterns:
+            if '**' in pattern:
+                clean_pattern = pattern.replace('/**', '').replace('**/', '')
+                if clean_pattern in path_obj.parts:
+                    return True
+            elif fnmatch.fnmatch(path, pattern) or fnmatch.fnmatch(path_obj.name, pattern):
+                return True
+        return False
+
+    def filter_files(self, files: list) -> list:
+        return [f for f in files if not self.should_exclude(f)]