Can Oh My Zsh plugin loader guarantee `compdef` availability before completion initialization during startup?
Goal: Determine whether Oh My Zsh plugin loader can ensure that a plugin's `compdef` call is valid before Zsh's completion system finishes initialization, given that plugin directories may be added to `fpath` and `_command` files may be sourced at different times. Constraints: Verify that `compinit` runs after plugin directories are added to `fpath` but befo