| ⇢ | C | InstallerBase added | |
| ⇢ | A | GroupRatingCalculator added | |
| ⇢ | A | GroupAnalysisExport added | |
| ⇢ | A | Crawler added | |
| ⇢ | A | OJModel added | |
| ⇢ | A | Installer added | |
| ⇢ | A | AccountExport added | |
| ⇢ | A | JudgeClient added | |
| ⇢ | A | Uninstall added | |
| ⇢ | A | Update added | |
| ⋮ | view more | ||
| A | ↘ | F | GroupController got worse |
| A | ↘ | F | GroupModel got worse |
| F | ↛ | Judge removed | |
| F | ↛ | Judge removed | |
| A | ↛ | Vijos removed | |
| A | ↛ | ContestHunter removed | |
| A | ↛ | CodeForces removed | |
| A | ↛ | Vijos removed | |
| A | ↛ | Core removed | |
| A | ↛ | HDU removed | |
| A | ↛ | Crawler removed | |
| A | ↛ | ContestHunter removed | |
| ⋮ | view more | ||