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Release sglang kernel 0.4.0 (#20440)

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Co-authored-by: Baizhou Zhang <sobereddiezhang@gmail.com>
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Xiaoyu Zhang
2026-03-16 20:34:58 +08:00
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docs/developer_guide/contribution_guide.md
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@@ -125,17 +125,17 @@ Users listed in [CI_PERMISSIONS.json](https://github.com/sgl-project/sglang/blob
- If you write multiple if/else blocks for new features, ensure the common path (e.g., NVIDIA hardware or the existing code path) is the first branch.
## How to update sgl-kernel
Since sglang and sgl-kernel are separate Python packages, our current GitHub CI infrastructure does not support updating a kernel and using it immediately within the same pull request (PR).
To add a new kernel or modify an existing one in the sgl-kernel package, you must use multiple PRs.
Since sglang and the `sglang-kernel` (prior `sgl-kernel`) distribution are separate Python packages, our current GitHub CI infrastructure does not support updating a kernel and using it immediately within the same pull request (PR).
To add a new kernel or modify an existing one in the `sgl-kernel/` source tree, you must use multiple PRs.
Follow these steps:
1. Submit a PR to update the sgl-kernel source code without using it in sglang python package (e.g., [#8884](https://github.com/sgl-project/sglang/pull/8884/files)).
2. Bump the version of sgl-kernel (e.g., [#9220](https://github.com/sgl-project/sglang/pull/9220/files)).
- Once merged, this will trigger an automatic release of the sgl-kernel wheel to PyPI.
2. Bump the version of the kernel package (e.g., [#9220](https://github.com/sgl-project/sglang/pull/9220/files)).
- Once merged, this will trigger an automatic release of the `sglang-kernel` wheel to PyPI.
- If not urgent, you can wait for other people to release the wheel. A new version will typically be released within one week.
3. Apply the changes:
- Update the sgl-kernel version in `sglang/python/pyproject.toml` to use the modified kernels.
- Update the `sglang-kernel` version in `sglang/python/pyproject.toml` to use the modified kernels.
- Update the related caller code in the sglang to use the new kernel.
## Tips for newcomers