Merge branch 'main' into ksh/cuda_bump

Author: kshyatt

.github/workflows/CompatCheck.yml

@@ -49,7 +49,7 @@ jobs:
       matrix:
         downgrade_mode: ['deps']
         group: ${{ fromJSON(needs.setup-matrix.outputs.groups) }}
-        julia-version: ['1', '1.10']
+        julia-version: ['1.10']
     steps:
       - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v3

CITATION.cff

@@ -8,9 +8,9 @@ authors:
   given-names: "Jutho"
   orcid: "https://orcid.org/0000-0002-0858-291X"
 title: "TensorKit.jl"
-version: "0.16.3"
+version: "0.16.4"
 doi: "10.5281/zenodo.8421339"
-date-released: "2026-02-22"
+date-released: "2026-04-23"
 url: "https://github.com/QuantumKitHub/TensorKit.jl"
 preferred-citation:
   type: article

docs/src/Changelog.md

@@ -18,22 +18,42 @@ When making changes to this project, please update the "Unreleased" section with
 
 When releasing a new version, move the "Unreleased" changes to a new version section with the release date.
 
-## [Unreleased](https://github.com/QuantumKitHub/TensorKit.jl/compare/v0.16.3...HEAD)
+## [Unreleased](https://github.com/QuantumKitHub/TensorKit.jl/compare/v0.16.4...HEAD)
 
 ### Added
 
-
 ### Changed
 
-
 ### Deprecated
 
-
 ### Removed
 
+### Fixed
+
+### Performance
+
+## [0.16.4](https://github.com/QuantumKitHub/TensorKit.jl/compare/v0.16.3...v0.16.4) - 2026-04-23
+
+### Added
+
+- Partial tensor support for AMDGPU via a new extension ([#341](https://github.com/QuantumKitHub/TensorKit.jl/pull/341))
+- Define `spacetype` for `TruncationSpace` ([#403](https://github.com/QuantumKitHub/TensorKit.jl/pull/403))
+
+### Changed
+
+- Updated MatrixAlgebraKit dependency to v0.6.5 with corresponding API updates ([#390](https://github.com/QuantumKitHub/TensorKit.jl/pull/390))
 
 ### Fixed
 
+- Fix ignored `adjoint` flag in `BraidingTensor` ([#392](https://github.com/QuantumKitHub/TensorKit.jl/pull/392))
+- Fix `MethodError` for certain tensor operations ([#406](https://github.com/QuantumKitHub/TensorKit.jl/pull/406))
+- Add square checks for `project_(anti)hermitian` and eigenvalue decompositions ([#408](https://github.com/QuantumKitHub/TensorKit.jl/pull/408))
+
+### Performance
+
+- Vectorize fusiontree manipulations ([#261](https://github.com/QuantumKitHub/TensorKit.jl/pull/261))
+- Avoid generic matmul fallback in transformation kernel ([#378](https://github.com/QuantumKitHub/TensorKit.jl/pull/378))
+- Reduce cache footprint by decoupling degeneracy-dependent data ([#387](https://github.com/QuantumKitHub/TensorKit.jl/pull/387))
 
 ## [0.16.3](https://github.com/QuantumKitHub/TensorKit.jl/compare/v0.16.2...v0.16.3) - 2026-02-22
 

src/spaces/vectorspaces.jl

@@ -409,7 +409,7 @@ while the second will return the spacetype if all types are equal, and throw a [
 """
 check_spacetype(::Type{Bool}, x, y, z...) = _allequal(spacetype, (x, y, z...))
 @noinline function check_spacetype(x, y, z...)
-    check_spacetype(Bool, x, y, z...) || throw(SpaceMismatch("incompatible space types"))
+    check_spacetype(Bool, x, y, z...) || throw(SpaceMismatch(lazy"incompatible space types $(type_repr.(spacetype.((x, y, z...))))"))
     return spacetype(x)
 end