Who contributed to Hugging Face on June 17, 2026?

2 developers shipped this update, including qgallouedec and albertvillanova.

What were the notable Hugging Face updates?

Padding-free training in AsyncGRPO, Add PRXPixelPipeline: pixel-space PRX text-to-image pipeline (#13928), and Add Sound Encoder to Cosmos3 (#13911).

@huggingface

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The Wire · Showcase

TRAINING GOES PADDING-FREE WHILE DIFFUSERS EXPANDS TO SOUND AND PIXEL SPACE

By RepoJournal · Filed 06:04 UTC on June 17, 2026 · About Hugging Face

2 people shipped this

qgallouedec @qgallouedec 1 cited

albertvillanova @albertvillanova 1 cited

AsyncGRPO just ditched padding overhead entirely, diffusers shipped pixel-space PRX and audio synthesis to Cosmos3, and LeRobot fixed a critical parquet row-group bug that was tanking episode fetch performance.

The training stack got leaner overnight. TRL's AsyncGRPOTrainer [1] now runs padding-free by default, unpacking each rank's padded slice into concatenated sequences and letting FlashAttention derive `cu_seq_lens` from position resets. This eliminates the memory tax of padded forward passes without changing the collator, so your existing dataloaders stay compatible. On the diffusers front, PRXPixelPipeline [2] adds pixel-space denoising (raw RGB, no VAE) conditioned on Qwen3-VL, while Cosmos3 [3] gained sound encoder support, expanding into multimodal generation territory. LeRobot fixed a nasty data layer bug [4] where aggregate and annotation re-write paths were collapsing multiple episodes into single row groups, tanking performance when fetching individual episodes. The fix enforces one row group per episode so reads hit a single byte range instead of scanning the whole shard. Security-wise, TRL [5] deleted the pr_style_bot workflow entirely after it proved repeatedly exploitable, consolidating style enforcement into the existing check_code_quality pipeline. transformers.js [6] refactored to the new singular COS API, switching from the deprecated plural `requestFileHandles()` to `requestFileHandle()`, and huggingface.js extended download metrics [7] to include `.zst` JAX weights in IntelliFold queries.

Action items

→ Update to AsyncGRPOTrainer to leverage padding-free training in your next training run huggingface/trl [plan]
→ Rebuild LeRobot datasets using the fixed parquet writer to restore per-episode fetch efficiency huggingface/lerobot [plan]
→ Update transformers.js to the singular COS API if you use cross-origin storage huggingface/transformers.js [monitor]

References

[1] Padding-free training in AsyncGRPO ↗ huggingface/trl
[2] Add PRXPixelPipeline: pixel-space PRX text-to-image pipeline (#13928) huggingface/diffusers
[3] Add Sound Encoder to Cosmos3 (#13911) huggingface/diffusers
[4] fix(datasets): enforce one parquet row group per episode in v3 data writes (#3807) huggingface/lerobot
[5] Delete CI pr_style_bot workflow ↗ huggingface/trl
[6] refactor(cos): use singular requestFileHandle() instead of requestFileHandles() (#1709) huggingface/transformers.js
[7] Update countDownloads filter for intellifold to include 'zst' extension (#2229) huggingface/huggingface.js

Quick answers

What shipped in Hugging Face on June 17, 2026?: AsyncGRPO just ditched padding overhead entirely, diffusers shipped pixel-space PRX and audio synthesis to Cosmos3, and LeRobot fixed a critical parquet row-group bug that was tanking episode fetch performance. In total, 23 commits, 20 pull requests, and 1 releases landed.
Who contributed to Hugging Face on June 17, 2026?: 2 developers shipped this update, including qgallouedec and albertvillanova.
What were the notable Hugging Face updates?: Padding-free training in AsyncGRPO, Add PRXPixelPipeline: pixel-space PRX text-to-image pipeline (#13928), and Add Sound Encoder to Cosmos3 (#13911).

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