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+---
+"lessgo": minor
+"@lessgo/darwin-arm64": minor
+"@lessgo/darwin-x64": minor
+"@lessgo/linux-x64": minor
+"@lessgo/linux-arm64": minor
+"@lessgo/win32-x64": minor
+"@lessgo/win32-arm64": minor
+---
+
+## Bug Fixes
+
+- Fix `!important` handling in variable declarations, merge declarations, and anonymous values
+- Fix Anonymous color values in `contrast()` and other color functions
+- Preserve `calc()` expressions in mixin default values
+- Fix `@page` pseudo-selectors and variable hoisting in imports
+- Fix parser handling of unmatched closing braces in `ParseUntil` to prevent over-consumption
+- Fix `Sub()` parser to match Less.js behavior for parens-error tests
+- Preserve parentheses in parenthesized list values with comma separation
+- Fix extend property formatting to match Less.js behavior
+- Fix namespace property access evaluation to Dimension for math operations
+- Prevent property merge duplication when using property accessors
+- Fix arrow function syntax handling with parameters in Less variables
+- Preserve frames for variable imports during path interpolation
+- Fix Quoted node evaluation inside URL for variable interpolation
+- Prevent incorrect deduplication of multi-target extends
+- Remove extra whitespace when extend-only rulesets are inside media queries
+- Stabilize import-remote test by pinning `@less/test-data@4.4.2`
+
+## Performance Improvements
+
+- Add `ReleaseTree` function for improved object pool utilization
+- Convert CSS output methods from slice concatenation to `strings.Builder` for reduced allocations
+- Add context map pool for evaluation phase allocations
+- Optimize `Selector.CreateDerived` to reduce map allocations
+- Optimize `EvalCall` memory allocations in `MixinDefinition`
+- Reduce unnecessary map allocations in CSS generation phase
+
+## Testing
+
+- Expand benchmark test suite to include custom integration tests
+- Add extensive test variations for overfitting detection across math modes, mixins, and other features