| Name | Lines of code | Maintainability | Test coverage |
| src/Middlewares/CookiesMiddleware.php | 82 | A 3 hrs | |
| src/Factory/Psr17Factory.php | 83 | A 35 mins | |
| src/Traits/MessageDecoratorTrait.php | 84 | A 0 mins | |
| src/Middlewares/HttpAuthMiddleware.php | 85 | A 3 hrs | |
| src/Middlewares/HttpPolicyMiddleware.php | 91 | B 5 hrs | |
| src/Request.php | 93 | A 1 hr | |
| src/ServerRequest.php | 102 | A 45 mins | |
| src/Sessions/CookieSessionHandler.php | 104 | A 25 mins | |
| src/Middlewares/SessionMiddleware.php | 112 | B 5 hrs | |
| src/Middlewares/ContentSecurityPolicyMiddleware.php | 136 | B 6 hrs | |
| src/Middlewares/HttpCorsMiddleware.php | 145 | C 1 day | |
| src/Response.php | 146 | A 35 mins | |
| src/Stream.php | 179 | A 25 mins | |
| src/Middlewares/CacheControlMiddleware.php | 197 | A 3 hrs | |
| src/Factory/Psr7Bridge.php | 212 | B 6 hrs | |
| src/Uri.php | 217 | B 6 hrs |