Document Homebrew transition for Fizzy 4

[robzolkos]

Summary

• clarifies that Fizzy 3.x remains available from the original Homebrew tap
• notes that Fizzy 4 RCs are published through GitHub Releases
• documents the planned Fizzy 4 stable cask command for Basecamp's tap

Testing

• Not run; docs-only change

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Summary by cubic

Clarifies Homebrew install paths for the Fizzy 4 transition. Adds a clear note that the Basecamp tap is only for 4.x stable; RCs are not published to Homebrew.

• Migration
  • Install 3.x stable: brew install robzolkos/fizzy-cli/fizzy-cli
  • Get 4.x RCs: download from GitHub Releases (not available via Homebrew)
  • When 4.x stable ships: brew install --cask basecamp/tap/fizzy

^{Written for commit d55e8a6. Summary will update on new commits.}

[Copilot]

Pull request overview

Updates the README’s Homebrew install guidance to clarify the transition from Fizzy 3.x (original tap) to Fizzy 4 (RCs via GitHub Releases, planned stable via Basecamp’s tap).

Changes:

• Documented that Fizzy 3.x remains available via robzolkos/fizzy-cli.
• Noted that Fizzy 4 release candidates are distributed via GitHub Releases.
• Updated the planned Homebrew command for Fizzy 4 stable to use a cask install.

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[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}