The skwp prompt's precmd calls git-info and ruby-info (prezto module
functions that live in ~/.zprezto/modules/{git,ruby}/functions). On
interactive shell startup, something — likely compinit's
insecure-directory pruning when parent dirs are group-writable —
strips those paths from $fpath after pmodload seeded them.
When precmd then references the autoload-declared-but-unfindable
functions, zsh fails to locate the definition file, aborts the
prompt render midway through, and zsh-syntax-highlighting latches
onto the broken half-prompt. Observed symptoms:
prompt_skwp_precmd: git-info: function definition file not found
prompt_skwp_precmd: ruby-info: function definition file not found
zsh: bad math expression: operand expected at '%F{135}%n%...'
_zsh_highlight_call_widget:2: bad math expression: operand...
Defensive re-seed: before calling 'prompt skwp', prepend the helper,
git, and ruby module function dirs to $fpath if they aren't already
present. Idempotent, cheap, and masks any upstream stripping
regardless of cause.
