From 7d61334e14ba8c3ca0c4ce3ae89c6ddcec6a3235 Mon Sep 17 00:00:00 2001
From: ChrisRackauckas <me@chrisrackauckas.com>
Date: Thu, 16 Oct 2025 01:31:11 -0400
Subject: [PATCH 1/2] Fix CUDSS extension for v0.5 and v0.6 compatibility
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Updates the ArrayInterfaceCUDSSExt to use the modern CUDSS API.
The deprecated CudssMatrix type has been replaced with standard
CUDA.CuVector types, which is the current API pattern in CUDSS v0.5+.

Changes:
- Replace CudssMatrix with CUDA.CuVector in lu_instance
- Add CUDA as explicit extension dependency
- Add CUDSS v0.5 and v0.6 to compatibility bounds
- Bump version to 7.20.1

Fixes the runtime incompatibility introduced by the breaking changes
in CUDSS v0.5 and v0.6 where CudssMatrix was removed in favor of
standard CUDA.jl types (CuVector).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 Project.toml                  |  6 +++---
 ext/ArrayInterfaceCUDSSExt.jl | 12 ++++++++----
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/Project.toml b/Project.toml
index 31c4bf0b..8b2db7c3 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "ArrayInterface"
 uuid = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"
-version = "7.20.0"
+version = "7.20.1"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
@@ -24,7 +24,7 @@ Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"
 ArrayInterfaceBandedMatricesExt = "BandedMatrices"
 ArrayInterfaceBlockBandedMatricesExt = "BlockBandedMatrices"
 ArrayInterfaceCUDAExt = "CUDA"
-ArrayInterfaceCUDSSExt = "CUDSS"
+ArrayInterfaceCUDSSExt = ["CUDSS", "CUDA"]
 ArrayInterfaceChainRulesCoreExt = "ChainRulesCore"
 ArrayInterfaceChainRulesExt = "ChainRules"
 ArrayInterfaceGPUArraysCoreExt = "GPUArraysCore"
@@ -39,7 +39,7 @@ Adapt = "4"
 BandedMatrices = "1"
 BlockBandedMatrices = "0.13"
 CUDA = "5"
-CUDSS = "0.2, 0.3, 0.4"
+CUDSS = "0.2, 0.3, 0.4, 0.5, 0.6"
 ChainRules = "1"
 ChainRulesCore = "1"
 ChainRulesTestUtils = "1"
diff --git a/ext/ArrayInterfaceCUDSSExt.jl b/ext/ArrayInterfaceCUDSSExt.jl
index 01fb2395..e6a4908d 100644
--- a/ext/ArrayInterfaceCUDSSExt.jl
+++ b/ext/ArrayInterfaceCUDSSExt.jl
@@ -2,14 +2,18 @@ module ArrayInterfaceCUDSSExt
 
 using ArrayInterface
 using CUDSS
+using CUDA
 
 function ArrayInterface.lu_instance(A::CUDSS.CuSparseMatrixCSR)
     ArrayInterface.LinearAlgebra.checksquare(A)
-    fact = CudssSolver(A, "G", 'F')
     T = eltype(A)
-    n = size(A,1)
-    x = CudssMatrix(T, n)
-    b = CudssMatrix(T, n)
+    n = size(A, 1)
+
+    # Use standard CUDA types (CuVector) instead of deprecated CudssMatrix
+    x = CUDA.CuVector{T}(undef, n)
+    b = CUDA.CuVector{T}(undef, n)
+
+    fact = CudssSolver(A, "G", 'F')
     cudss("analysis", fact, x, b)
     fact
 end

From 4581303da98286defa6b6cb88ec13ad5dbfa8f98 Mon Sep 17 00:00:00 2001
From: Christopher Rackauckas <accounts@chrisrackauckas.com>
Date: Thu, 16 Oct 2025 01:33:10 -0400
Subject: [PATCH 2/2] Update Project.toml

---
 Project.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Project.toml b/Project.toml
index 8b2db7c3..8557c2f5 100644
--- a/Project.toml
+++ b/Project.toml
@@ -39,7 +39,7 @@ Adapt = "4"
 BandedMatrices = "1"
 BlockBandedMatrices = "0.13"
 CUDA = "5"
-CUDSS = "0.2, 0.3, 0.4, 0.5, 0.6"
+CUDSS = "0.5, 0.6"
 ChainRules = "1"
 ChainRulesCore = "1"
 ChainRulesTestUtils = "1"