653 lines
28 KiB
Python
653 lines
28 KiB
Python
#!/usr/bin/env python3
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"""
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Skill Validator - Validates skill directories against quality standards
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This script validates a skill directory structure, documentation, and Python scripts
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against the claude-skills ecosystem standards. It checks for required files, proper
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formatting, and compliance with tier-specific requirements.
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Usage:
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python skill_validator.py <skill_path> [--tier TIER] [--json] [--verbose]
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Author: Claude Skills Engineering Team
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Version: 1.0.0
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Dependencies: Python Standard Library Only
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"""
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import argparse
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import ast
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import json
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import re
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import sys
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import yaml
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import datetime as dt
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from pathlib import Path
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from typing import Dict, List, Any, Optional, Tuple
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class ValidationError(Exception):
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"""Custom exception for validation errors"""
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pass
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class ValidationReport:
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"""Container for validation results"""
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def __init__(self, skill_path: str):
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self.skill_path = skill_path
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self.timestamp = dt.datetime.now(dt.timezone.utc).isoformat().replace("+00:00", "Z")
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self.checks = {}
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self.warnings = []
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self.errors = []
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self.suggestions = []
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self.overall_score = 0.0
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self.compliance_level = "FAIL"
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def add_check(self, check_name: str, passed: bool, message: str = "", score: float = 0.0):
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"""Add a validation check result"""
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self.checks[check_name] = {
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"passed": passed,
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"message": message,
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"score": score
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}
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def add_warning(self, message: str):
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"""Add a warning message"""
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self.warnings.append(message)
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def add_error(self, message: str):
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"""Add an error message"""
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self.errors.append(message)
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def add_suggestion(self, message: str):
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"""Add an improvement suggestion"""
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self.suggestions.append(message)
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def calculate_overall_score(self):
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"""Calculate overall compliance score"""
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if not self.checks:
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self.overall_score = 0.0
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return
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total_score = sum(check["score"] for check in self.checks.values())
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max_score = len(self.checks) * 1.0
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self.overall_score = (total_score / max_score) * 100 if max_score > 0 else 0.0
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# Determine compliance level
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if self.overall_score >= 90:
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self.compliance_level = "EXCELLENT"
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elif self.overall_score >= 75:
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self.compliance_level = "GOOD"
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elif self.overall_score >= 60:
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self.compliance_level = "ACCEPTABLE"
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elif self.overall_score >= 40:
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self.compliance_level = "NEEDS_IMPROVEMENT"
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else:
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self.compliance_level = "POOR"
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class SkillValidator:
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"""Main skill validation engine"""
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# Tier requirements
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TIER_REQUIREMENTS = {
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"BASIC": {
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"min_skill_md_lines": 100,
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"min_scripts": 1,
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"script_size_range": (100, 300),
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"required_dirs": ["scripts"],
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"optional_dirs": ["assets", "references", "expected_outputs"],
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"features_required": ["argparse", "main_guard"]
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},
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"STANDARD": {
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"min_skill_md_lines": 200,
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"min_scripts": 1,
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"script_size_range": (300, 500),
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"required_dirs": ["scripts", "assets", "references"],
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"optional_dirs": ["expected_outputs"],
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"features_required": ["argparse", "main_guard", "json_output", "help_text"]
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},
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"POWERFUL": {
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"min_skill_md_lines": 300,
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"min_scripts": 2,
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"script_size_range": (500, 800),
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"required_dirs": ["scripts", "assets", "references", "expected_outputs"],
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"optional_dirs": [],
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"features_required": ["argparse", "main_guard", "json_output", "help_text", "error_handling"]
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}
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}
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REQUIRED_SKILL_MD_SECTIONS = [
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"Name", "Description", "Features", "Usage", "Examples"
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]
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FRONTMATTER_REQUIRED_FIELDS = [
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"Name", "Tier", "Category", "Dependencies", "Author", "Version"
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]
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def __init__(self, skill_path: str, target_tier: Optional[str] = None, verbose: bool = False):
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self.skill_path = Path(skill_path).resolve()
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self.target_tier = target_tier
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self.verbose = verbose
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self.report = ValidationReport(str(self.skill_path))
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def log_verbose(self, message: str):
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"""Log verbose message if verbose mode enabled"""
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if self.verbose:
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print(f"[VERBOSE] {message}", file=sys.stderr)
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def validate_skill_structure(self) -> ValidationReport:
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"""Main validation entry point"""
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try:
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self.log_verbose(f"Starting validation of {self.skill_path}")
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# Check if path exists
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if not self.skill_path.exists():
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self.report.add_error(f"Skill path does not exist: {self.skill_path}")
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return self.report
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if not self.skill_path.is_dir():
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self.report.add_error(f"Skill path is not a directory: {self.skill_path}")
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return self.report
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# Run all validation checks
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self._validate_required_files()
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self._validate_skill_md()
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self._validate_readme()
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self._validate_directory_structure()
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self._validate_python_scripts()
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self._validate_tier_compliance()
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# Calculate overall score
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self.report.calculate_overall_score()
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self.log_verbose(f"Validation completed. Score: {self.report.overall_score:.1f}")
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except Exception as e:
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self.report.add_error(f"Validation failed with exception: {str(e)}")
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return self.report
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def _validate_required_files(self):
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"""Validate presence of required files"""
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self.log_verbose("Checking required files...")
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# Check SKILL.md
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skill_md_path = self.skill_path / "SKILL.md"
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if skill_md_path.exists():
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self.report.add_check("skill_md_exists", True, "SKILL.md found", 1.0)
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else:
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self.report.add_check("skill_md_exists", False, "SKILL.md missing", 0.0)
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self.report.add_error("SKILL.md is required but missing")
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# Check README.md
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readme_path = self.skill_path / "README.md"
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if readme_path.exists():
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self.report.add_check("readme_exists", True, "README.md found", 1.0)
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else:
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self.report.add_check("readme_exists", False, "README.md missing", 0.0)
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self.report.add_warning("README.md is recommended but missing")
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self.report.add_suggestion("Add README.md with usage instructions and examples")
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def _validate_skill_md(self):
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"""Validate SKILL.md content and format"""
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self.log_verbose("Validating SKILL.md...")
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skill_md_path = self.skill_path / "SKILL.md"
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if not skill_md_path.exists():
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return
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try:
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content = skill_md_path.read_text(encoding='utf-8')
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lines = content.split('\n')
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line_count = len([line for line in lines if line.strip()])
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# Check line count
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min_lines = self._get_tier_requirement("min_skill_md_lines", 100)
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if line_count >= min_lines:
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self.report.add_check("skill_md_length", True,
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f"SKILL.md has {line_count} lines (≥{min_lines})", 1.0)
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else:
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self.report.add_check("skill_md_length", False,
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f"SKILL.md has {line_count} lines (<{min_lines})", 0.0)
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self.report.add_error(f"SKILL.md too short: {line_count} lines, minimum {min_lines}")
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# Validate frontmatter
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self._validate_frontmatter(content)
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# Check required sections
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self._validate_required_sections(content)
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except Exception as e:
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self.report.add_check("skill_md_readable", False, f"Error reading SKILL.md: {str(e)}", 0.0)
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self.report.add_error(f"Cannot read SKILL.md: {str(e)}")
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def _validate_frontmatter(self, content: str):
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"""Validate SKILL.md frontmatter"""
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self.log_verbose("Validating frontmatter...")
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# Extract frontmatter
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if content.startswith('---'):
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try:
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end_marker = content.find('---', 3)
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if end_marker == -1:
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self.report.add_check("frontmatter_format", False,
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"Frontmatter closing marker not found", 0.0)
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return
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frontmatter_text = content[3:end_marker].strip()
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frontmatter = yaml.safe_load(frontmatter_text)
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if not isinstance(frontmatter, dict):
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self.report.add_check("frontmatter_format", False,
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"Frontmatter is not a valid dictionary", 0.0)
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return
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# Check required fields
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missing_fields = []
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for field in self.FRONTMATTER_REQUIRED_FIELDS:
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if field not in frontmatter:
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missing_fields.append(field)
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if not missing_fields:
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self.report.add_check("frontmatter_complete", True,
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"All required frontmatter fields present", 1.0)
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else:
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self.report.add_check("frontmatter_complete", False,
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f"Missing fields: {', '.join(missing_fields)}", 0.0)
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self.report.add_error(f"Missing frontmatter fields: {', '.join(missing_fields)}")
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except yaml.YAMLError as e:
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self.report.add_check("frontmatter_format", False,
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f"Invalid YAML frontmatter: {str(e)}", 0.0)
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self.report.add_error(f"Invalid YAML frontmatter: {str(e)}")
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else:
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self.report.add_check("frontmatter_exists", False,
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"No frontmatter found", 0.0)
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self.report.add_error("SKILL.md must start with YAML frontmatter")
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def _validate_required_sections(self, content: str):
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"""Validate required sections in SKILL.md"""
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self.log_verbose("Checking required sections...")
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missing_sections = []
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for section in self.REQUIRED_SKILL_MD_SECTIONS:
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pattern = rf'^#+\s*{re.escape(section)}\s*$'
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if not re.search(pattern, content, re.MULTILINE | re.IGNORECASE):
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missing_sections.append(section)
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if not missing_sections:
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self.report.add_check("required_sections", True,
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"All required sections present", 1.0)
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else:
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self.report.add_check("required_sections", False,
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f"Missing sections: {', '.join(missing_sections)}", 0.0)
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self.report.add_error(f"Missing required sections: {', '.join(missing_sections)}")
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def _validate_readme(self):
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"""Validate README.md content"""
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self.log_verbose("Validating README.md...")
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readme_path = self.skill_path / "README.md"
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if not readme_path.exists():
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return
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try:
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content = readme_path.read_text(encoding='utf-8')
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# Check minimum content length
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if len(content.strip()) >= 200:
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self.report.add_check("readme_substantial", True,
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"README.md has substantial content", 1.0)
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else:
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self.report.add_check("readme_substantial", False,
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"README.md content is too brief", 0.5)
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self.report.add_suggestion("Expand README.md with more detailed usage instructions")
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except Exception as e:
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self.report.add_check("readme_readable", False,
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f"Error reading README.md: {str(e)}", 0.0)
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def _validate_directory_structure(self):
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"""Validate directory structure against tier requirements"""
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self.log_verbose("Validating directory structure...")
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required_dirs = self._get_tier_requirement("required_dirs", ["scripts"])
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optional_dirs = self._get_tier_requirement("optional_dirs", [])
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# Check required directories
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missing_required = []
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for dir_name in required_dirs:
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dir_path = self.skill_path / dir_name
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if dir_path.exists() and dir_path.is_dir():
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self.report.add_check(f"dir_{dir_name}_exists", True,
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f"{dir_name}/ directory found", 1.0)
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else:
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missing_required.append(dir_name)
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self.report.add_check(f"dir_{dir_name}_exists", False,
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f"{dir_name}/ directory missing", 0.0)
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if missing_required:
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self.report.add_error(f"Missing required directories: {', '.join(missing_required)}")
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# Check optional directories and provide suggestions
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missing_optional = []
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for dir_name in optional_dirs:
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dir_path = self.skill_path / dir_name
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if not (dir_path.exists() and dir_path.is_dir()):
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missing_optional.append(dir_name)
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if missing_optional:
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self.report.add_suggestion(f"Consider adding optional directories: {', '.join(missing_optional)}")
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def _validate_python_scripts(self):
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"""Validate Python scripts in the scripts directory"""
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self.log_verbose("Validating Python scripts...")
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scripts_dir = self.skill_path / "scripts"
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if not scripts_dir.exists():
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return
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python_files = list(scripts_dir.glob("*.py"))
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min_scripts = self._get_tier_requirement("min_scripts", 1)
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# Check minimum number of scripts
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if len(python_files) >= min_scripts:
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self.report.add_check("min_scripts_count", True,
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f"Found {len(python_files)} Python scripts (≥{min_scripts})", 1.0)
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else:
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self.report.add_check("min_scripts_count", False,
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f"Found {len(python_files)} Python scripts (<{min_scripts})", 0.0)
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self.report.add_error(f"Insufficient scripts: {len(python_files)}, minimum {min_scripts}")
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# Validate each script
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for script_path in python_files:
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self._validate_single_script(script_path)
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def _validate_single_script(self, script_path: Path):
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"""Validate a single Python script"""
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script_name = script_path.name
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self.log_verbose(f"Validating script: {script_name}")
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try:
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content = script_path.read_text(encoding='utf-8')
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# Count lines of code (excluding empty lines and comments)
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lines = content.split('\n')
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loc = len([line for line in lines if line.strip() and not line.strip().startswith('#')])
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# Check script size against tier requirements
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size_range = self._get_tier_requirement("script_size_range", (100, 1000))
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min_size, max_size = size_range
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if min_size <= loc <= max_size:
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self.report.add_check(f"script_size_{script_name}", True,
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f"{script_name} has {loc} LOC (within {min_size}-{max_size})", 1.0)
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else:
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self.report.add_check(f"script_size_{script_name}", False,
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f"{script_name} has {loc} LOC (outside {min_size}-{max_size})", 0.5)
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if loc < min_size:
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self.report.add_suggestion(f"Consider expanding {script_name} (currently {loc} LOC)")
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else:
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self.report.add_suggestion(f"Consider refactoring {script_name} (currently {loc} LOC)")
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# Parse and validate Python syntax
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try:
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tree = ast.parse(content)
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self.report.add_check(f"script_syntax_{script_name}", True,
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f"{script_name} has valid Python syntax", 1.0)
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# Check for required features
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self._validate_script_features(tree, script_name, content)
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except SyntaxError as e:
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self.report.add_check(f"script_syntax_{script_name}", False,
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f"{script_name} has syntax error: {str(e)}", 0.0)
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self.report.add_error(f"Syntax error in {script_name}: {str(e)}")
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except Exception as e:
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self.report.add_check(f"script_readable_{script_name}", False,
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f"Cannot read {script_name}: {str(e)}", 0.0)
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self.report.add_error(f"Cannot read {script_name}: {str(e)}")
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def _validate_script_features(self, tree: ast.AST, script_name: str, content: str):
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"""Validate required script features"""
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required_features = self._get_tier_requirement("features_required", ["argparse", "main_guard"])
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# Check for argparse usage
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if "argparse" in required_features:
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has_argparse = self._check_argparse_usage(tree)
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self.report.add_check(f"script_argparse_{script_name}", has_argparse,
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f"{'Uses' if has_argparse else 'Missing'} argparse in {script_name}", 1.0 if has_argparse else 0.0)
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if not has_argparse:
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self.report.add_error(f"{script_name} must use argparse for command-line arguments")
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# Check for main guard
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if "main_guard" in required_features:
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has_main_guard = 'if __name__ == "__main__"' in content
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self.report.add_check(f"script_main_guard_{script_name}", has_main_guard,
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f"{'Has' if has_main_guard else 'Missing'} main guard in {script_name}", 1.0 if has_main_guard else 0.0)
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if not has_main_guard:
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self.report.add_error(f"{script_name} must have 'if __name__ == \"__main__\"' guard")
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# Check for external imports (should only use stdlib)
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external_imports = self._check_external_imports(tree)
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if not external_imports:
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self.report.add_check(f"script_imports_{script_name}", True,
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f"{script_name} uses only standard library", 1.0)
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else:
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self.report.add_check(f"script_imports_{script_name}", False,
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f"{script_name} uses external imports: {', '.join(external_imports)}", 0.0)
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self.report.add_error(f"{script_name} uses external imports: {', '.join(external_imports)}")
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def _check_argparse_usage(self, tree: ast.AST) -> bool:
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"""Check if the script uses argparse"""
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for node in ast.walk(tree):
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if isinstance(node, ast.Import):
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for alias in node.names:
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if alias.name == 'argparse':
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return True
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elif isinstance(node, ast.ImportFrom):
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if node.module == 'argparse':
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return True
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return False
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def _check_external_imports(self, tree: ast.AST) -> List[str]:
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"""Check for external (non-stdlib) imports"""
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# Simplified check - a more comprehensive solution would use a stdlib module list
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stdlib_modules = {
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'argparse', 'ast', 'json', 'os', 'sys', 'pathlib', 'datetime', 'typing',
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'collections', 're', 'math', 'random', 'itertools', 'functools', 'operator',
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'csv', 'sqlite3', 'urllib', 'http', 'html', 'xml', 'email', 'base64',
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'hashlib', 'hmac', 'secrets', 'tempfile', 'shutil', 'glob', 'fnmatch',
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'subprocess', 'threading', 'multiprocessing', 'queue', 'time', 'calendar',
|
|
'zoneinfo', 'locale', 'gettext', 'logging', 'warnings', 'unittest',
|
|
'doctest', 'pickle', 'copy', 'pprint', 'reprlib', 'enum', 'dataclasses',
|
|
'contextlib', 'abc', 'atexit', 'traceback', 'gc', 'weakref', 'types',
|
|
'copy', 'pprint', 'reprlib', 'enum', 'decimal', 'fractions', 'statistics',
|
|
'cmath', 'platform', 'errno', 'io', 'codecs', 'unicodedata', 'stringprep',
|
|
'textwrap', 'string', 'struct', 'difflib', 'heapq', 'bisect', 'array',
|
|
'weakref', 'types', 'copyreg', 'uuid', 'mmap', 'ctypes'
|
|
}
|
|
|
|
external_imports = []
|
|
for node in ast.walk(tree):
|
|
if isinstance(node, ast.Import):
|
|
for alias in node.names:
|
|
module_name = alias.name.split('.')[0]
|
|
if module_name not in stdlib_modules:
|
|
external_imports.append(alias.name)
|
|
elif isinstance(node, ast.ImportFrom) and node.module:
|
|
module_name = node.module.split('.')[0]
|
|
if module_name not in stdlib_modules:
|
|
external_imports.append(node.module)
|
|
|
|
return list(set(external_imports))
|
|
|
|
def _validate_tier_compliance(self):
|
|
"""Validate overall tier compliance"""
|
|
if not self.target_tier:
|
|
return
|
|
|
|
self.log_verbose(f"Validating {self.target_tier} tier compliance...")
|
|
|
|
# This is a summary check - individual checks are done in other methods
|
|
critical_checks = ["skill_md_exists", "min_scripts_count", "skill_md_length"]
|
|
failed_critical = [check for check in critical_checks
|
|
if check in self.report.checks and not self.report.checks[check]["passed"]]
|
|
|
|
if not failed_critical:
|
|
self.report.add_check("tier_compliance", True,
|
|
f"Meets {self.target_tier} tier requirements", 1.0)
|
|
else:
|
|
self.report.add_check("tier_compliance", False,
|
|
f"Does not meet {self.target_tier} tier requirements", 0.0)
|
|
self.report.add_error(f"Failed critical checks for {self.target_tier} tier: {', '.join(failed_critical)}")
|
|
|
|
def _get_tier_requirement(self, requirement: str, default: Any) -> Any:
|
|
"""Get tier-specific requirement value"""
|
|
if self.target_tier and self.target_tier in self.TIER_REQUIREMENTS:
|
|
return self.TIER_REQUIREMENTS[self.target_tier].get(requirement, default)
|
|
return default
|
|
|
|
|
|
class ReportFormatter:
|
|
"""Formats validation reports for output"""
|
|
|
|
@staticmethod
|
|
def format_json(report: ValidationReport) -> str:
|
|
"""Format report as JSON"""
|
|
return json.dumps({
|
|
"skill_path": report.skill_path,
|
|
"timestamp": report.timestamp,
|
|
"overall_score": round(report.overall_score, 1),
|
|
"compliance_level": report.compliance_level,
|
|
"checks": report.checks,
|
|
"warnings": report.warnings,
|
|
"errors": report.errors,
|
|
"suggestions": report.suggestions
|
|
}, indent=2)
|
|
|
|
@staticmethod
|
|
def format_human_readable(report: ValidationReport) -> str:
|
|
"""Format report as human-readable text"""
|
|
lines = []
|
|
lines.append("=" * 60)
|
|
lines.append("SKILL VALIDATION REPORT")
|
|
lines.append("=" * 60)
|
|
lines.append(f"Skill: {report.skill_path}")
|
|
lines.append(f"Timestamp: {report.timestamp}")
|
|
lines.append(f"Overall Score: {report.overall_score:.1f}/100 ({report.compliance_level})")
|
|
lines.append("")
|
|
|
|
# Group checks by category
|
|
structure_checks = {k: v for k, v in report.checks.items() if k.startswith(('skill_md', 'readme', 'dir_'))}
|
|
script_checks = {k: v for k, v in report.checks.items() if k.startswith('script_')}
|
|
other_checks = {k: v for k, v in report.checks.items() if k not in structure_checks and k not in script_checks}
|
|
|
|
if structure_checks:
|
|
lines.append("STRUCTURE VALIDATION:")
|
|
for check_name, result in structure_checks.items():
|
|
status = "✓ PASS" if result["passed"] else "✗ FAIL"
|
|
lines.append(f" {status}: {result['message']}")
|
|
lines.append("")
|
|
|
|
if script_checks:
|
|
lines.append("SCRIPT VALIDATION:")
|
|
for check_name, result in script_checks.items():
|
|
status = "✓ PASS" if result["passed"] else "✗ FAIL"
|
|
lines.append(f" {status}: {result['message']}")
|
|
lines.append("")
|
|
|
|
if other_checks:
|
|
lines.append("OTHER CHECKS:")
|
|
for check_name, result in other_checks.items():
|
|
status = "✓ PASS" if result["passed"] else "✗ FAIL"
|
|
lines.append(f" {status}: {result['message']}")
|
|
lines.append("")
|
|
|
|
if report.errors:
|
|
lines.append("ERRORS:")
|
|
for error in report.errors:
|
|
lines.append(f" • {error}")
|
|
lines.append("")
|
|
|
|
if report.warnings:
|
|
lines.append("WARNINGS:")
|
|
for warning in report.warnings:
|
|
lines.append(f" • {warning}")
|
|
lines.append("")
|
|
|
|
if report.suggestions:
|
|
lines.append("SUGGESTIONS:")
|
|
for suggestion in report.suggestions:
|
|
lines.append(f" • {suggestion}")
|
|
lines.append("")
|
|
|
|
return "\n".join(lines)
|
|
|
|
|
|
def main():
|
|
"""Main entry point"""
|
|
parser = argparse.ArgumentParser(
|
|
description="Validate skill directories against quality standards",
|
|
formatter_class=argparse.RawDescriptionHelpFormatter,
|
|
epilog="""
|
|
Examples:
|
|
python skill_validator.py engineering/my-skill
|
|
python skill_validator.py engineering/my-skill --tier POWERFUL --json
|
|
python skill_validator.py engineering/my-skill --verbose
|
|
|
|
Tier Options:
|
|
BASIC - Basic skill requirements (100+ lines SKILL.md, 1+ script)
|
|
STANDARD - Standard skill requirements (200+ lines, advanced features)
|
|
POWERFUL - Powerful skill requirements (300+ lines, comprehensive features)
|
|
"""
|
|
)
|
|
|
|
parser.add_argument("skill_path",
|
|
help="Path to the skill directory to validate")
|
|
parser.add_argument("--tier",
|
|
choices=["BASIC", "STANDARD", "POWERFUL"],
|
|
help="Target tier for validation (optional)")
|
|
parser.add_argument("--json",
|
|
action="store_true",
|
|
help="Output results in JSON format")
|
|
parser.add_argument("--verbose",
|
|
action="store_true",
|
|
help="Enable verbose logging")
|
|
|
|
args = parser.parse_args()
|
|
|
|
try:
|
|
# Create validator and run validation
|
|
validator = SkillValidator(args.skill_path, args.tier, args.verbose)
|
|
report = validator.validate_skill_structure()
|
|
|
|
# Format and output report
|
|
if args.json:
|
|
print(ReportFormatter.format_json(report))
|
|
else:
|
|
print(ReportFormatter.format_human_readable(report))
|
|
|
|
# Exit with error code if validation failed
|
|
if report.errors or report.overall_score < 60:
|
|
sys.exit(1)
|
|
else:
|
|
sys.exit(0)
|
|
|
|
except KeyboardInterrupt:
|
|
print("\nValidation interrupted by user", file=sys.stderr)
|
|
sys.exit(130)
|
|
except Exception as e:
|
|
print(f"Validation failed: {str(e)}", file=sys.stderr)
|
|
if args.verbose:
|
|
import traceback
|
|
traceback.print_exc()
|
|
sys.exit(1)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|