5.1.0

What's Changed

• Serialize CaskStructs in the internal API by @Rylan12 in #21502
• Enable strict typing in Homebrew::TestBot (take 3) by @dduugg in #21576
• github_runner_matrix: skip newer intel CI unless exact tag by @cho-m in #21620
• Homebrew 5.1.0 deprecations/disables/deletions by @MikeMcQuaid in #21629
• Cleanup Download Queue by @MikeMcQuaid in #21638
• rubocops/urls: collect all livecheck urls by @samford in #21647
• formula_auditor: only audit compatibility_version on valid platform by @cho-m in #21649
• Remove deprecation check in autobump logic by @SMillerDev in #21651
• Fix issue with missing ruby_soruce_checksum in CaskStruct by @Rylan12 in #21653
• Autobump resources with livecheck blocks by @nandahkrishna in #21623
• Remove API placeholders in FormulaStruct and CaskStruct by @Rylan12 in #21656
• bundle: auto-tap formulae or casks in brew bundle by @gibfahn in #21654
• Handle missing cask methods. by @MikeMcQuaid in #21657
• bump-formula-pr: add checkbox that suggests to check comment annotations by @botantony in #21658
• dev-cmd/tests: remove HOMEBREW_REALLY_USE_INTERNAL_API from environment by @MikeMcQuaid in #21663
• bump-formula-pr: remove unnecessary newlines by @botantony in #21660
• Fix display on "dumb" terminals by @stac47 in #21659
• dev-cmd/irb: use irb executable instead of gem by @Bo98 in #21661
• Portable Ruby 4.0.1 by @p-linnane in #21459
• test_bot: avoid deferring when only running dependent tests by @cho-m in #21672
• build(deps): bump the github-actions group with 3 updates by @dependabot[bot] in #21673
• build(deps): bump certifi from 2026.1.4 to 2026.2.25 in /Library/Homebrew/formula-analytics in the pip group across 1 directory by @dependabot[bot] in #21674
• migrator: fix cask loads. by @MikeMcQuaid in #21669
• build(deps): bump the bundler group across 2 directories with 8 updates by @dependabot[bot] in #21675
• Link versioned keg-only formulae by default by @MikeMcQuaid in #21676
• Add brew style --fix --todo by @MikeMcQuaid in #21679
• docs: reference brew generate-zap instead of external CreateZap by @p-linnane in #21680
• Revert "Link versioned keg-only formulae by default" by @scpeters in #21682
• docs: fix Ronn parser compatibility typo by @Rohan5commit in #21683
• Revert "Revert "Link versioned keg-only formulae by default"" by @MikeMcQuaid in #21684
• github: change artifact selection order by @daeho-ro in #21685
• bundle/installer: output "Fetching" message. by @MikeMcQuaid in #21686
• docs: fix MCP server test description typo by @Rohan5commit in #21688
• Don't attempt to use the internal API for Casks by @Rylan12 in #21667
• bump: handle simple arch-specific version bumps by @samford in #21692
• Remove rubocop:todo from RBI files. by @MikeMcQuaid in #21693
• docs: fix Common Issues typo by @Rohan5commit in #21696
• bin/brew: simplify filtering of BIN_BREW_EXPORTED_VARS by @carlocab in #21697
• bin/brew: tighten regex for variable exclusion by @carlocab in #21699
• formula: imply link_overwrite for related formulae by @MikeMcQuaid in #21689
• rubocops/move_to_extend_os: audit OS checks in extend/os by @ZhongRuoyu in #21698
• unlink: preserve non-keg-only versioned links by @MikeMcQuaid in #21700
• Docs: fix duplicate word in Brewfile guide by @Rohan5commit in #21703
• os/mac/xcode: promote Xcode 26.3 by @Bo98 in #21701
• github/workflows: add cache-homebrew-prefix workflow keys. by @MikeMcQuaid in #21704
• Deprecate no_autobump! because: :requires_manual_review by @botantony in #21550
• bump: don't error when checking casks with version :latest by @bevanjkay in #21705
• Fix Ruby version comparison logic for 4.0+ by @hqzing in #21706
• SkipConditions: join multiple skip messages by @rexmhall09 in #21708
• docs: outdated macOS tools imply tier 2 by @scpeters in #21710
• diagnostic: reword issue reporting guidelines by @scpeters in #21711
• Json: set allow_duplicate_key in JSON.parse call by @samford in #21709
• formulary: soften deprecation errors from FromBottleLoader by @Bo98 in #21712
• bump: use semicolon skip messages delimiter by @samford in #21714

New Contributors

• @stac47 made their first contribution in #21659
• @Rohan5commit made their first contribution in #21683
• @hqzing made their first contribution in #21706
• @rexmhall09 made their first contribution in #21708

Full Changelog: 5.0.16...5.1.0