LIBERO offline: TinyVLA v1 (2.5GB) ratio 0.092 vs pi0.5-libero-finetuned (13.8GB) ratio 0.057; GR00T not loadable

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DAgger iter0 checkpoint: first closed-loop STABLE behavior (sitstand 8s), loss 0.001-0.004

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VLA closed-loop driver (fixed head camera + auto-gain): falls <1s all behaviors — BC covariate shift on unstable system

closed-loop MicroDuck harness: obs.rs 61D builder validated by ONNX teacher (stands 8s @10Hz replan)

duck FT eval (fixed expert): 13/21 better than zero-baseline

sim renders: GT vs duck-FT policy (FIXED expert), external camera

microduck fine-tune ckpt (8k steps on duck v2 data), expert keys fixed

fix expert keys (_orig_mod stripped)

fix expert keys (_orig_mod stripped): prior file had a random flow head on load

CRITICAL fix: torch.compile'd expert saved as expert._orig_mod.* -> from_pretrained silently dropped it (random flow head at eval). Save the uncompiled module

lekiwi zero-shot eval harness (hub streaming, 2x2 demo/descriptor grid)

zero-shot LeKiwi eval of final v4 ckpt: ratio 1.64 all conditions (demos and descriptor both inert)

FINAL v4-allchannels checkpoint @ 60k global steps (11.5M samples, 163-dataset physical-ai stream)

microduck sim renders, external MuJoCo camera: GT teacher vs v4@20k side by side, offset-from-STAND action convention

v4-allchannels intermediate checkpoint @ ~20k global steps (3.8M samples over 163-dataset physical-ai stream) + README

fix: HubEpisodeStream.set_epoch was missing — first worker-recycle epoch boundary crashed the run

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eval_microduck: zero-shot eval+render harness (v4 mode: demos from same behavior, duck descriptor)

train_fast: non-persistent hub workers (recycle each epoch to reset leaks)

streaming: episodes_per_epoch worker lifetime cap (dataloader workers leaked to OOM-kill on multi-hour runs twice)

microduck zero-shot renders + metrics (v4 ckpt step_10000): all combos worse than zero-baseline, honest negative

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