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[Docs] Add non-causal support to attention backend docs - #41643

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noooop merged 2 commits into
vllm-project:mainfrom
MatthewBonanni:non_causal_docs
May 4, 2026
Merged

noooop merged 2 commits into
vllm-project:mainfrom
MatthewBonanni:non_causal_docs

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@MatthewBonanni

@MatthewBonanni MatthewBonanni commented May 4, 2026

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Purpose

Given the popularity of DFlash, we should report non-causal support in the attention backend documentation. This PR adds this column.

Test Plan

Docs build should succeed (docs-only PR)

Test Result

TBD


Essential Elements of an Effective PR Description Checklist
  • The purpose of the PR, such as "Fix some issue (link existing issues this PR will resolve)".
  • The test plan, such as providing test command.
  • The test results, such as pasting the results comparison before and after, or e2e results
  • (Optional) The necessary documentation update, such as updating supported_models.md and examples for a new model.

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>
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MatthewBonanni requested a review from hmellor as a code owner May 4, 2026 15:33

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Claude Code Review

This pull request is from a fork — automated review is disabled. A repository maintainer can comment @claude review to run a one-time review.

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mergify Bot commented May 4, 2026

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Documentation preview: https://vllm--41643.org.readthedocs.build/en/41643/

@mergify mergify Bot added the documentation Improvements or additions to documentation label May 4, 2026
@MatthewBonanni MatthewBonanni added the ready ONLY add when PR is ready to merge/full CI is needed label May 4, 2026

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Code Review

This pull request adds a "Non-Causal" (bidirectional) attention support column to the attention backend documentation and updates the generation script to populate this field. Review feedback suggests clarifying the definition of non-causal attention for decoder models and improving code formatting consistency in the script.

Comment thread docs/design/attention_backends.md
Comment thread tools/pre_commit/generate_attention_backend_docs.py
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noooop enabled auto-merge (squash) May 4, 2026 18:27

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Thanks!

@noooop
noooop merged commit be5983b into vllm-project:main May 4, 2026
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@MatthewBonanni
MatthewBonanni deleted the non_causal_docs branch May 5, 2026 20:01
Copilot AI pushed a commit to hongbolv/vllm that referenced this pull request May 7, 2026
…#41643)

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>
Co-authored-by: hongbolv <33214277+hongbolv@users.noreply.github.com>
weifang231 pushed a commit to weifang231/eb-vllm that referenced this pull request May 13, 2026
…#41643)

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>
mfylcek pushed a commit to mfylcek/vllm that referenced this pull request May 19, 2026
…#41643)

Signed-off-by: Matthew Bonanni <mbonanni@redhat.com>
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3 participants