| Name | Lines of code | Maintainability | Test coverage |
| lib/roma/routing/cb_rttable.rb | 331 | D 2 days | |
| lib/roma/command/command_definition.rb | 391 | F 6 days | |
| lib/roma/tools/mkconfig.rb | 519 | D 2 days | |
| lib/roma/storage/basic_storage.rb | 615 | F 1 wk | |
| lib/roma/plugin/plugin_storage.rb | 623 | F 1 wk | |
| lib/roma/romad.rb | 692 | F 1 wk | |
| lib/roma/async_process.rb | 926 | F 1 wk | |
| lib/roma/plugin/plugin_alist.rb | 1,085 | F 2 wks | |
| lib/roma/command/sys_command_receiver.rb | 1,149 | F 1 wk |