I think it might be nice to explain this in-depth more.

#### For example:

To enable tab completion for tmuxstart in ZSH, add the tmuxstart completion file to a directory in your `fpath`:

    $ mkdir -p ~/.zsh/completions
    $ cp completions/_tmuxstart.zsh ~/.zsh/completions/_tmuxstart

Add the following to your `.zshrc` file to ensure tab completion is enabled and the `~/.zsh/completions` directory is added to your `fpath`:

    autoload -U compinit
    compinit
    fpath=(~/.zsh/completion $fpath)