Unbraced zsh variables that would read as a modifier: zsh hands git a garbled ref, with no error

In the Bash tool’s zsh, git show $b:scripts/x applies the :s modifier to $b and hands git a garbled ref, with no error.

What the guard blocks

The guard blocks an unbraced $name:<letter> that zsh would read as a modifier.

What the replay blocked

A replay of 63,930 historical commands blocked 13, with 0 false positives.