---
id: pr-vllm-26315
repo: vllm-project/vllm
pr: 26315
title: '[Attention][UX][1/N] Add AttentionConfig and change attention env vars to CLI arguments'
author: MatthewBonanni
date: '2025-12-05'
url: https://github.com/vllm-project/vllm/pull/26315
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 66e674cdd549e89b341fb33405a2c02ec5f5ae8d
inclusion_reason: defer
changed_paths:
- tests/compile/test_fusion_attn.py
- tests/v1/kv_connector/unit/test_nixl_connector.py
- tests/v1/worker/test_gpu_model_runner.py
- vllm/attention/backends/abstract.py
- vllm/attention/layer.py
- vllm/attention/selector.py
- vllm/attention/utils/fa_utils.py
- vllm/config/__init__.py
- vllm/config/attention.py
- vllm/config/model.py
- vllm/config/vllm.py
- vllm/engine/arg_utils.py
- vllm/model_executor/models/config.py
- vllm/model_executor/models/vision.py
- vllm/platforms/cuda.py
- vllm/utils/flashinfer.py
- vllm/v1/attention/backends/flash_attn.py
- vllm/v1/attention/backends/flashinfer.py
- vllm/v1/attention/backends/mla/common.py
- vllm/v1/attention/backends/mla/flashattn_mla.py
- vllm/v1/attention/backends/rocm_attn.py
- vllm/v1/attention/backends/triton_attn.py
artifact_dir: evidence/pull-bundles/vllm/gh-26315
head_ref_oid: 99544358904cc6de54871277ea63dc3ee44f6c8d
---
# [Attention][UX][1/N] Add AttentionConfig and change attention env vars to CLI arguments

- Repository: `vllm-project/vllm`
- PR: [26315](https://github.com/vllm-project/vllm/pull/26315)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `tests/compile/test_fusion_attn.py`
- `tests/v1/kv_connector/unit/test_nixl_connector.py`
- `tests/v1/worker/test_gpu_model_runner.py`
- `vllm/attention/backends/abstract.py`
- `vllm/attention/layer.py`
- `vllm/attention/selector.py`
- `vllm/attention/utils/fa_utils.py`
- `vllm/config/__init__.py`
- `vllm/config/attention.py`
- `vllm/config/model.py`
- `vllm/config/vllm.py`
- `vllm/engine/arg_utils.py`
- `vllm/model_executor/models/config.py`
- `vllm/model_executor/models/vision.py`
- `vllm/platforms/cuda.py`
- `vllm/utils/flashinfer.py`
- `vllm/v1/attention/backends/flash_attn.py`
- `vllm/v1/attention/backends/flashinfer.py`
- `vllm/v1/attention/backends/mla/common.py`
- `vllm/v1/attention/backends/mla/flashattn_mla.py`
- `vllm/v1/attention/backends/rocm_attn.py`
- `vllm/v1/attention/backends/triton_attn.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-26315`
