What's Changed

• Load installed formulae from kegs by @Rylan12 in https://github.com/Homebrew/brew/pull/20897
• Only clear timestamped Dependency#expand cache when requested by @Rylan12 in https://github.com/Homebrew/brew/pull/20909
• Download the correct API files in brew update by @Rylan12 in https://github.com/Homebrew/brew/pull/20913
• Detect outdated formulae using only the minimal API by @Rylan12 in https://github.com/Homebrew/brew/pull/20912
• refactor: update type signatures to always return boolean for install… by @hyuraku in https://github.com/Homebrew/brew/pull/20860
• Resolve dependencies according to bottle/tab when installing older bottles by @Copilot in https://github.com/Homebrew/brew/pull/20802
• dependency: handle generic macOS simulation in uses_from_macos dependencies by @chenrui333 in https://github.com/Homebrew/brew/pull/20919
• rubocop: Ignore .github/copilot-instructions.md under AllCops by @issyl0 in https://github.com/Homebrew/brew/pull/20920
• formula_versions: fix tracking previous versions of formulae by @ZhongRuoyu in https://github.com/Homebrew/brew/pull/20921
• add pypi_packages formula DSL by @botantony in https://github.com/Homebrew/brew/pull/20864
• Improve Linux cask handling by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20925
• formula_installer: fix pinned dependencies handling. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20923
• brew.sh: enable concurrent downloads for devcmdrun. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20928
• macos_version: drop support for Mojave and below 4.7.0. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20930
• Prepare for deprecation of --no-quarantine. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20929
• Fix tap migrations without full scope by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20932
• Bump the "all" group with 2 updates across multiple ecosystems by @dependabot[bot] in https://github.com/Homebrew/brew/pull/20933
• style: handle unwriteable cache directory. by @MikeMcQuaid in https://github.com/Homebrew/brew/pull/20935
• Display correct outdated head information by @Rylan12 in https://github.com/Homebrew/brew/pull/20940
• Fix Formula#tap_path to only use real formula paths by @Rylan12 in https://github.com/Homebrew/brew/pull/20941
• chore(brew doctor): Suppress the bold disclaimer when -q/--quiet is passed by @boblail in https://github.com/Homebrew/brew/pull/20945
• docs: update FAQ with file permissions behavior by @sean-freeman in https://github.com/Homebrew/brew/pull/20946

New Contributors

• @sean-freeman made their first contribution in https://github.com/Homebrew/brew/pull/20946

Full Changelog: https://github.com/Homebrew/brew/compare/4.6.18...4.6.19