One Qwen3-VL-8B checkpoint improves all three streaming spatial benchmarks at once: OST-Bench 50.52 to 63.93 (+13.41), UCS-Bench +7.44, OVO-S-Bench +4.91. The change is in the supervision, with no new memory module or annotation.
The ChronoReplay paper calls the failure mode interface lock-in: post-train on one answer format and that readout improves while others stall. A categorical-only control hits 58.03 on OVO-S but drops OST from 50.52 to 47.48.
š The recipe ⢠Keep targets in native formats (option, metric value with units, timestamp) ⢠Replay episodes in source order, each target attached to its causal prefix ⢠Loss mass: 2/3 on 33,180 single-turn examples, 1/3 on 6,381 episodes (alpha = 0.5)
š The numbers ⢠Three-benchmark mean 56.86, against 50.74 (categorical-only) and 50.76 (trajectory-only) ⢠Chronological order beats a shifted-order control by about 2.41 OST points on two seeds; the 13.41 belongs to the whole recipe ⢠Adaptive frame selection adds +4.09 on OVO-S (57.98) with 80.50 frames instead of 128
ā ļø Caveats ⢠One backbone, indoor scenes only; the single-family comparison is confounded by data coverage ⢠The repo has a CPU smoke test and a --dry-run training command, but no license and no fine-tuned weights