See ZSH options.

DIRNAME

# Same as:
cd DIRNAME

..

# Same as:
cd ..

Git

On install Git with Brew while using ZSH:

zsh completions and functions have been installed to:
  /usr/local/share/zsh/site-functions

History

See ~/.oh-my-zsh/lib/history.zsh.

## History command configuration
setopt extended_history       # record timestamp of command in HISTFILE
setopt hist_expire_dups_first # delete duplicates first when HISTFILE size exceeds HISTSIZE
setopt hist_ignore_dups       # ignore duplicated commands history list
setopt hist_ignore_space      # ignore commands that start with space
setopt hist_verify            # show command with history expansion to user before running it
setopt share_history          # share command history data

You can override those in your own config.

unsetopt share_history

Warning - the history.sh file gets loaded after your ~/.zshrc file.