Release v0.6.7 (#223)

* Update changelog for v0.6.7

* Bump version to v0.6.7

Author: lkdvos

Project.toml

@@ -1,6 +1,6 @@
 name = "MatrixAlgebraKit"
 uuid = "6c742aac-3347-4629-af66-fc926824e5e4"
-version = "0.6.6"
+version = "0.6.7"
 authors = ["Jutho Haegeman <jutho.haegeman@ugent.be>, Lukas Devos, Katharine Hyatt and contributors"]
 
 [deps]

docs/src/changelog.md

@@ -18,7 +18,7 @@ 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/MatrixAlgebraKit.jl/compare/v0.6.6...HEAD)
+## [Unreleased](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/compare/v0.6.7...HEAD)
 
 ### Added
 
@@ -32,6 +32,22 @@ When releasing a new version, move the "Unreleased" changes to a new version sec
 
 ### Performance
 
+## [0.6.7](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/compare/v0.6.6...v0.6.7) - 2026-05-06
+
+### Changed
+
+- Test infrastructure: use a test setup matrix like TensorKit ([#215](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/pull/215)).
+
+### Fixed
+
+- Improved consistency of gauge fixing in eigenvalue pullback functions ([#221](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/pull/221)).
+- Ensure no sharing of data in LQ decomposition output ([#219](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/pull/219)).
+- Mooncake and Enzyme AD rules for `Diagonal` inputs ([#179](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/pull/179)).
+
+### Performance
+
+- Added a rudimentary precompile workload to reduce time-to-first-execution ([#217](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/pull/217)).
+
 ## [0.6.6](https://github.com/QuantumKitHub/MatrixAlgebraKit.jl/compare/v0.6.5...v0.6.6) - 2026-04-24
 
 ### Added