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api_endpoint_validator_openapi_and_code_best_practices.py
pythonGenerated for task: api-patterns: API design principles and decision-making. REST vs GraphQL vs tRPC selection, response
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api_endpoint_validator_openapi_and_code_best_practices.py
1# SKILL.md
2
3---
4name: api-patterns
5description: API design principles and decision-making. REST vs GraphQL vs tRPC selection, response formats, versioning, pagination.
6allowed-tools: Read, Write, Edit, Glob, Grep
7---
8
9# API Patterns
10
11> API design principles and decision-making for 2025.
12> **Learn to THINK, not copy fixed patterns.**
13
14## 🎯 Selective Reading Rule
15
16**Read ONLY files relevant to the request!** Check the content map, find what you need.
17
18---
19
20## 📑 Content Map
21
22| File | Description | When to Read |
23|------|-------------|--------------|
24| `api-style.md` | REST vs GraphQL vs tRPC decision tree | Choosing API type |
25| `rest.md` | Resource naming, HTTP methods, status codes | Designing REST API |
26| `response.md` | Envelope pattern, error format, pagination | Response structure |
27| `graphql.md` | Schema design, when to use, security | Considering GraphQL |
28| `trpc.md` | TypeScript monorepo, type safety | TS fullstack projects |
29| `versioning.md` | URI/Header/Query versioning | API evolution planning |
30| `auth.md` | JWT, OAuth, Passkey, API Keys | Auth pattern selection |
31| `rate-limiting.md` | Token bucket, sliding window | API protection |
32| `documentation.md` | OpenAPI/Swagger best practices | Documentation |
33| `security-testing.md` | OWASP API Top 10, auth/authz testing | Security audits |
34
35---
36
37## 🔗 Related Skills
38
39| Need | Skill |
40|------|-------|
41| API implementation | `@[skills/backend-development]` |
42| Data structure | `@[skills/database-design]` |
43| Security details | `@[skills/security-hardening]` |
44
45---
46
47## ✅ Decision Checklist
48
49Before designing an API:
50
51- [ ] **Asked user about API consumers?**
52- [ ] **Chosen API style for THIS context?** (REST/GraphQL/tRPC)
53- [ ] **Defined consistent response format?**
54- [ ] **Planned versioning strategy?**
55- [ ] **Considered authentication needs?**
56- [ ] **Planned rate limiting?**
57- [ ] **Documentation approach defined?**
58
59---
60
61## ❌ Anti-Patterns
62
63**DON'T:**
64- Default to REST for everything
65- Use verbs in REST endpoints (/getUsers)
66- Return inconsistent response formats
67- Expose internal errors to clients
68- Skip rate limiting
69
70**DO:**
71- Choose API style based on context
72- Ask about client requirements
73- Document thoroughly
74- Use appropriate status codes
75
76---
77
78## Script
79
80| Script | Purpose | Command |
81|--------|---------|---------|
82| `scripts/api_validator.py` | API endpoint validation | `python scripts/api_validator.py <project_path>` |
83
84
85
86
87# api_validator.py
88
89```python
90#!/usr/bin/env python3
91"""
92API Validator - Checks API endpoints for best practices.
93Validates OpenAPI specs, response formats, and common issues.
94"""
95import sys
96import json
97import re
98from pathlib import Path
99
100# Fix Windows console encoding for Unicode output
101try:
102 sys.stdout.reconfigure(encoding='utf-8', errors='replace')
103 sys.stderr.reconfigure(encoding='utf-8', errors='replace')
104except AttributeError:
105 pass # Python < 3.7
106
107def find_api_files(project_path: Path) -> list:
108 """Find API-related files."""
109 patterns = [
110 "**/*api*.ts", "**/*api*.js", "**/*api*.py",
111 "**/routes/*.ts", "**/routes/*.js", "**/routes/*.py",
112 "**/controllers/*.ts", "**/controllers/*.js",
113 "**/endpoints/*.ts", "**/endpoints/*.py",
114 "**/*.openapi.json", "**/*.openapi.yaml",
115 "**/swagger.json", "**/swagger.yaml",
116 "**/openapi.json", "**/openapi.yaml"
117 ]
118
119 files = []
120 for pattern in patterns:
121 files.extend(project_path.glob(pattern))
122
123 # Exclude node_modules, etc.
124 return [f for f in files if not any(x in str(f) for x in ['node_modules', '.git', 'dist', 'build', '__pycache__'])]
125
126def check_openapi_spec(file_path: Path) -> dict:
127 """Check OpenAPI/Swagger specification."""
128 issues = []
129 passed = []
130
131 try:
132 content = file_path.read_text(encoding='utf-8')
133
134 if file_path.suffix == '.json':
135 spec = json.loads(content)
136 else:
137 # Basic YAML check
138 if 'openapi:' in content or 'swagger:' in content:
139 passed.append("[OK] OpenAPI/Swagger version defined")
140 else:
141 issues.append("[X] No OpenAPI version found")
142
143 if 'paths:' in content:
144 passed.append("[OK] Paths section exists")
145 else:
146 issues.append("[X] No paths defined")
147
148 if 'components:' in content or 'definitions:' in content:
149 passed.append("[OK] Schema components defined")
150
151 return {'file': str(file_path), 'passed': passed, 'issues': issues, 'type': 'openapi'}
152
153 # JSON OpenAPI checks
154 if 'openapi' in spec or 'swagger' in spec:
155 passed.append("[OK] OpenAPI version defined")
156
157 if 'info' in spec:
158 if 'title' in spec['info']:
159 passed.append("[OK] API title defined")
160 if 'version' in spec['info']:
161 passed.append("[OK] API version defined")
162 if 'description' not in spec['info']:
163 issues.append("[!] API description missing")
164
165 if 'paths' in spec:
166 path_count = len(spec['paths'])
167 passed.append(f"[OK] {path_count} endpoints defined")
168
169 # Check each path
170 for path, methods in spec['paths'].items():
171 for method, details in methods.items():
172 if method in ['get', 'post', 'put', 'patch', 'delete']:
173 if 'responses' not in details:
174 issues.append(f"[X] {method.upper()} {path}: No responses defined")
175 if 'summary' not in details and 'description' not in details:
176 issues.append(f"[!] {method.upper()} {path}: No description")
177
178 except Exception as e:
179 issues.append(f"[X] Parse error: {e}")
180
181 return {'file': str(file_path), 'passed': passed, 'issues': issues, 'type': 'openapi'}
182
183def check_api_code(file_path: Path) -> dict:
184 """Check API code for common issues."""
185 issues = []
186 passed = []
187
188 try:
189 content = file_path.read_text(encoding='utf-8')
190
191 # Check for error handling
192 error_patterns = [
193 r'try\s*{', r'try:', r'\.catch\(',
194 r'except\s+', r'catch\s*\('
195 ]
196 has_error_handling = any(re.search(p, content) for p in error_patterns)
197 if has_error_handling:
198 passed.append("[OK] Error handling present")
199 else:
200 issues.append("[X] No error handling found")
201
202 # Check for status codes
203 status_patterns = [
204 r'status\s*\(\s*\d{3}\s*\)', r'statusCode\s*[=:]\s*\d{3}',
205 r'HttpStatus\.', r'status_code\s*=\s*\d{3}',
206 r'\.status\(\d{3}\)', r'res\.status\('
207 ]
208 has_status = any(re.search(p, content) for p in status_patterns)
209 if has_status:
210 passed.append("[OK] HTTP status codes used")
211 else:
212 issues.append("[!] No explicit HTTP status codes")
213
214 # Check for validation
215 validation_patterns = [
216 r'validate', r'schema', r'zod', r'joi', r'yup',
217 r'pydantic', r'@Body\(', r'@Query\('
218 ]
219 has_validation = any(re.search(p, content, re.I) for p in validation_patterns)
220 if has_validation:
221 passed.append("[OK] Input validation present")
222 else:
223 issues.append("[!] No input validation detected")
224
225 # Check for auth middleware
226 auth_patterns = [
227 r'auth', r'jwt', r'bearer', r'token',
228 r'middleware', r'guard', r'@Authenticated'
229 ]
230 has_auth = any(re.search(p, content, re.I) for p in auth_patterns)
231 if has_auth:
232 passed.append("[OK] Authentication/authorization detected")
233
234 # Check for rate limiting
235 rate_patterns = [r'rateLimit', r'throttle', r'rate.?limit']
236 has_rate = any(re.search(p, content, re.I) for p in rate_patterns)
237 if has_rate:
238 passed.append("[OK] Rate limiting present")
239
240 # Check for logging
241 log_patterns = [r'console\.log', r'logger\.', r'logging\.', r'log\.']
242 has_logging = any(re.search(p, content) for p in log_patterns)
243 if has_logging:
244 passed.append("[OK] Logging present")
245
246 except Exception as e:
247 issues.append(f"[X] Read error: {e}")
248
249 return {'file': str(file_path), 'passed': passed, 'issues': issues, 'type': 'code'}
250
251def main():
252 target = sys.argv[1] if len(sys.argv) > 1 else "."
253 project_path = Path(target)
254
255 print("\n" + "=" * 60)
256 print(" API VALIDATOR - Endpoint Best Practices Check")
257 print("=" * 60 + "\n")
258
259 api_files = find_api_files(project_path)
260
261 if not api_files:
262 print("[!] No API files found.")
263 print(" Looking for: routes/, controllers/, api/, openapi.json/yaml")
264 sys.exit(0)
265
266 results = []
267 for file_path in api_files[:15]: # Limit
268 if 'openapi' in file_path.name.lower() or 'swagger' in file_path.name.lower():
269 result = check_openapi_spec(file_path)
270 else:
271 result = check_api_code(file_path)
272 results.append(result)
273
274 # Print results
275 total_issues = 0
276 total_passed = 0
277
278 for result in results:
279 print(f"\n[FILE] {result['file']} [{result['type']}]")
280 for item in result['passed']:
281 print(f" {item}")
282 total_passed += 1
283 for item in result['issues']:
284 print(f" {item}")
285 if item.startswith("[X]"):
286 total_issues += 1
287
288 print("\n" + "=" * 60)
289 print(f"[RESULTS] {total_passed} passed, {total_issues} critical issues")
290 print("=" * 60)
291
292 if total_issues == 0:
293 print("[OK] API validation passed")
294 sys.exit(0)
295 else:
296 print("[X] Fix critical issues before deployment")
297 sys.exit(1)
298
299if __name__ == "__main__":
300 main()
301
302```