fix: add misisng validation.py module

Author: shadowfax92

packages/browseros/build/modules/feature/validation.py

@@ -0,0 +1,55 @@
+"""
+Feature validation utilities.
+
+Shared validation functions for feature names and descriptions.
+"""
+
+import re
+from typing import Tuple
+
+
+# Valid description prefixes (conventional commits style)
+VALID_PREFIXES = ("feat:", "fix:", "build:", "chore:", "series:")
+
+
+def validate_description(description: str) -> Tuple[bool, str]:
+    """Validate description has required prefix.
+
+    Returns:
+        Tuple of (is_valid, error_message)
+    """
+    description = description.strip()
+    if not description:
+        return False, "Description cannot be empty"
+
+    if not any(description.startswith(prefix) for prefix in VALID_PREFIXES):
+        return False, f"Description must start with one of: {', '.join(VALID_PREFIXES)}"
+
+    return True, ""
+
+
+def validate_feature_name(name: str) -> Tuple[bool, str]:
+    """Validate feature name format.
+
+    Feature names should be lowercase kebab-case identifiers.
+
+    Returns:
+        Tuple of (is_valid, error_message)
+    """
+    if not name:
+        return False, "Feature name cannot be empty"
+
+    if " " in name:
+        return False, "Feature name cannot contain spaces (use hyphens instead)"
+
+    if ":" in name:
+        return False, "Feature name cannot contain ':' (did you pass a description as the name?)"
+
+    if name != name.lower():
+        return False, f"Feature name must be lowercase (got '{name}', use '{name.lower()}')"
+
+    # Check for valid characters (alphanumeric, hyphens, underscores)
+    if not re.match(r'^[a-z0-9][a-z0-9_-]*$', name):
+        return False, "Feature name must start with a letter/number and contain only lowercase letters, numbers, hyphens, and underscores"
+
+    return True, ""