Who contributed to Hugging Face on July 18, 2026?

6 developers shipped this update, including yzhautouskay, sayakpaul, YiYi Xu, Albert Villanova del Moral, Quentin Gallouédec, and imstevenpmwork.

What were the notable Hugging Face updates?

Cosmos3 Distilled support, [tests] Pipeline test refactor, and Add not_params to ModularPipelineTesterMixin (#14207).

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The Wire · Showcase

DIFFUSERS SHIPS COSMOS3 FEW-STEP INFERENCE, LEROBOT STRIPS 3K LINES OF VENDORED CODE

By RepoJournal · Filed 07:00 UTC on July 18, 2026 · About Hugging Face

6 people shipped this

imstevenpmwork @imstevenpmwork 4 cited

Albert Villanova del Moral @albertvillanova 3 cited

yzhautouskay @yzhautouskay 1 cited

sayakpaul @sayakpaul 1 cited

YiYi Xu @yiyixuxu 1 cited

Quentin Gallouédec @qgallouedec

Cosmos3 distilled checkpoints hit diffusers with 4-step T2I and I2V support, while lerobot kills its Qwen2.5-VL fork and rebases onto native transformers.

In brief

Diffusers now supports Cosmos3 Distilled for few-step inference. fewer forward passes, same quality. the distillation game is real.
LeRobot refactored wall-x to subclass native Transformers Qwen2.5-VL instead of vendoring it. killed 3k lines of duplicate code in one go.
TRL removed redundant torch.tensor wrapping in KTO batch labels. small fix, but these paper-cuts add up fast in training loops.
TRL now documents max_steps requirement for iterable datasets in GRPO and RLOO. classic footgun. docs probably save someone a week of debugging.

The diffusers pipeline now supports nvidia's Cosmos3-Super distilled variants [1], both 4-step checkpoints shipping with fixed sigma schedules already baked in for immediate inference without tuning. Parallel to that, diffusers is gutting its test layer [2] and adding granular control over pipeline signatures [3], letting test classes declare which canonical parameters a pipeline deliberately drops (like guidance-distilled models skipping negative_prompt) so regressions fail hard. Over in lerobot, the Wall-X policy got a major haircut [7]: the team ripped out 2.8k lines of vendored Qwen2.5-VL code and subclassed the native transformers version instead, killing the hand-sync tax every time transformers updates. That refactor is part of a broader policy cleanup [8] [9] [10] extracting shared model components and standardizing how policies register themselves by convention rather than boilerplate. trl moved fast on housekeeping: KTO trainer got redundant tensor re-wrapping removed [4] [6], and both GRPO and RLOO trainers now document the max_steps requirement for iterable datasets [5], closing the docs gap that already existed in DPO and SFT.

Action items

→ Review lerobot Wall-X rebase for compatibility before next deployment huggingface/lerobot [plan]
→ Adopt Cosmos3 distilled checkpoints in downstream diffusers workflows huggingface/diffusers [monitor]
→ Update any custom KTO trainers to remove redundant torch.tensor wraps huggingface/trl [plan]

References

[1] Cosmos3 Distilled support ↗ huggingface/diffusers
[2] [tests] Pipeline test refactor ↗ huggingface/diffusers
[3] Add not_params to ModularPipelineTesterMixin (#14207) huggingface/diffusers
[4] Remove redundant torch.tensor re-wrapping of batch labels in KTO (#6431) huggingface/trl
[5] Document max_steps requirement for iterable datasets in GRPO and RLOO ↗ huggingface/trl
[6] Remove redundant torch.tensor re-wrapping of batch labels in KTO ↗ huggingface/trl
[7] refactor(wall-x): subclass native Transformers Qwen2.5-VL instead of vendoring it ↗ huggingface/lerobot
[8] refactor(policies): extract shared model components ↗ huggingface/lerobot
[9] refactor(processors): share policy pipeline builders ↗ huggingface/lerobot
[10] refactor(policies): resolve policy components by convention ↗ huggingface/lerobot

Quick answers

What shipped in Hugging Face on July 18, 2026?: Cosmos3 distilled checkpoints hit diffusers with 4-step T2I and I2V support, while lerobot kills its Qwen2.5-VL fork and rebases onto native transformers. In total, 20 commits and 20 pull requests landed.
Who contributed to Hugging Face on July 18, 2026?: 6 developers shipped this update, including yzhautouskay, sayakpaul, YiYi Xu, Albert Villanova del Moral, Quentin Gallouédec, and imstevenpmwork.
What were the notable Hugging Face updates?: Cosmos3 Distilled support, [tests] Pipeline test refactor, and Add not_params to ModularPipelineTesterMixin (#14207).

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