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wire 2026-09-20
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Flash and sage varlen prep work under torch.compile dynamic shapes

By RepoJournal · Filed · About Hugging Face · Composed from the cited sources · methodology

The varlen attention paths in diffusers and the Metal flash SDPA path in kernels-community both landed fixes for failures that only showed up under real execution conditions, and nothing in the day obliges an upgrade.

Fix flash/sage varlen prep under torch.compile with dynamic shapes (#14568) huggingface/diffusers

by Shivam Shrirao

The no-mask varlen prep path no longer calls `.item()` at all, removing the graph break that Flux hit because it passes no attention mask, so the flash-attn and sage varlen backends are usable under `torch.compile` with dynamic shapes. Zero-length sequences are now handled in the varlen offsets, and a dynamic-compile test was added; masked varlen keeps one `.item()` for the data-dependent key l...

[MPS] Fix metal flash sdpa encoder handoff huggingface/kernels-community

by Isalia20

Rather than creating a new compute encoder on the command buffer Torch created, which fails when another encoder is already active, the Metal flash SDPA path reuses Torch's compute encoder directly; the blit path ends compute coalescing before opening its own encoder. That is what made the encoder handoff fail on MPS.

[Bot] Update Inference Providers documentation huggingface/hub-docs

by HuggingFaceInfra

The Inference Providers docs were regenerated by bumping `@huggingface/tasks` and `@huggingface/inference` to latest and re-running the generator, then merged automatically by the documentation workflow. Expect the published provider list to track the current SDK output.

Quick answers

What shipped in Hugging Face on September 20, 2026?
The varlen attention paths in diffusers and the Metal flash SDPA path in kernels-community both landed fixes for failures that only showed up under real execution conditions, and nothing in the day obliges an upgrade. In total, 3 commits and 3 pull requests landed.
Who contributed to Hugging Face on September 20, 2026?
3 developers shipped this update, including Shivam Shrirao, HuggingFaceInfra, and Isalia20.
What were the notable Hugging Face updates?
Fix flash/sage varlen prep under torch.compile with dynamic shapes (#14568), [MPS] Fix metal flash sdpa encoder handoff, and [Bot] Update Inference Providers documentation.