---
id: pr-quack-103
repo: Dao-AILab/quack
pr: 103
title: Fix gemm_out inplace versus separate out tensor pytorch custom op schema mismatch
author: thakkarV
date: '2026-04-13'
url: https://github.com/Dao-AILab/quack/pull/103
source_category: upstream-code
architectures:
- sm100
tags:
- gemm
- norm
techniques: []
hardware_features: []
kernel_types:
- gemm
- norm
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 9807d77baa99cef80b6ab93ee711904089fc0ab1
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- quack/gemm_interface.py
- tests/test_linear.py
artifact_dir: evidence/pull-bundles/quack/gh-103
head_ref_oid: fa8f672aff44f1d37c0a6de670335ec6e81e1b0f
---
# Fix gemm_out inplace versus separate out tensor pytorch custom op schema mismatch

- Repository: `Dao-AILab/quack`
- PR: [103](https://github.com/Dao-AILab/quack/pull/103)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `quack/gemm_interface.py`
- `tests/test_linear.py`

## Evidence Bundle

`evidence/pull-bundles/quack/gh-103`
