fix: update packageManager to pnpm@9.15.9 to match lockfileVersion 9.0 in pnpm-lock.yaml (#4432)

test: regression test for @container mixin parameter variable resolution (#4420)

Fix `not` keyword silently ignored when used without parentheses in conditions (#4421)

feat: PR-based release flow for alpha; test suite proving all three release properties (#4431)

fix(issue#4356): parenthesis in media query (#4427)

fix(less): upgrade make-dir to v4 to fix security vulnerability (#4426)

fix: ensure npm publish is always backed by a GitHub tag, release, and version-bump commit (#4430)

test: Add coverage for :is()/:matches()/:where() containing nested :has() selectors and comma-separated lists (#4422)

fix: webpack browser build - use UMD dist/less.js, add CJS bundle (#4424)

chore: remove .claude directory and add to .gitignore (#4419)

fix: publish script skips stale version markers in squash merges (#4418)

fix: CJS compatibility, enriched npm README, ESM tests (#4417)

chore: release v4.6.0 (#4415)

fix: pre-existing bug fixes in tree nodes (#4414)

feat: JSDoc type annotations for all tree node files (#4413)