| C | ↘ | F | UrlGenerator got worse |
| ⇢ | A | ResponseTrait::streamDownload() added | |
| ⇢ | A | ResponseTrait::file() added | |
| ⇢ | A | ResponseTrait::withHeaders() added | |
| ⇢ | A | Redirection::action() added | |
| ⇢ | A | RouterException::actionNotDefined() added | |
| ⇢ | A | UrlGenerator::action() added | |
| ⇢ | A | HttpException::unkownStatusCode() added | |
| A | ↘ | B | Response::_setStatus() got worse |
| A | ↛ | Redirection::withHeaders() removed |