An invalid upstream cask definition can abort brew bundle entirely

Homebrew can fail brew bundle before package install begins when a cask DSL change makes an existing cask stanza invalid. In this case, 1password-cli failed with: generate_completions_from_executable does not support shell(s): ..., which blocked all bundle processing. Verified on macOS with Homebrew (2026-04).

If brew bundle fails with an invalid cask definition in upstream Homebrew metadata, temporarily remove that cask from Brewfile generation and install the tool through an alternate package source until the cask is fixed upstream. Re-check the cask in brew info before re-adding it.