| # Chart versions | |
| `r2a-auroc.png` and `r2a-pdfs.png` describe the current R2a checkpoint. | |
| The existing numbered charts (`1_hero.png`, `2_auroc.png`, `3_roc.png`, `4_latency.png`) are retained historical artifacts for the pre-R2a checkpoint. Their scores and timings do not describe R2a. | |