This Zsh configuration is designed to be universally adaptable, ready for any further customization.

better_defaults.zsh

# ============================================
# Zsh Configuration with better default
# Zsh configs that anyone should be welcomed to incorporate
# No complex prompts, just the essentials:
# - No aliases and keybindings.
# - No need for third-party plugins.
# ============================================

# ========= Completion & History Setup =========
autoload -Uz compinit
compinit -u

# Ignore unnecessary files such as .pyc
zstyle ':completion:*:(all-|)files' ignored-patterns '(|*/).pyc'

# Enhance process killing commands with menu-style completion
zstyle ':completion:*:*:kill:*' menu yes select
zstyle ':completion:*:kill:*' force-list always

# Load and configure menu-style completion
zmodload -i zsh/complist
bindkey -M menuselect '^M' accept

# ========= Directory Navigation Options =========
unsetopt auto_cd
setopt auto_pushd
setopt pushd_ignore_dups
setopt pushd_silent

# ========= Fine-tuning Completions =========
setopt auto_param_slash
setopt complete_in_word
setopt glob_complete
setopt list_beep
setopt list_packed
setopt list_rows_first
setopt no_beep

# ========= History Configuration =========
setopt append_history
setopt inc_append_history
setopt share_history
unsetopt bang_hist
unsetopt extended_history
setopt hist_ignore_space
setopt hist_reduce_blanks

# Only enable history logging if history file is writable
if [ -w ~/.zsh_history -o -w ~ ]; then
  SAVEHIST=100000
  HISTSIZE=100000
  HISTFILE=~/.zsh_history
fi

# ========= Utility Functions =========
# Check if command is executable or aliased
_has() { return $( whence $1 &>/dev/null ); }

# Safe execution of commands
_try() { return $( eval $* &>/dev/null ); }

# Get version of a command, or "n/a" if not available
_versionof() {
  if _has "$1"; then
    echo "$1 $($1 --version)"
  else
    echo "$1 n/a"
  fi
}

# ========= Better Editing Defaults =========

# Improve tab completion for redirection
self-insert-redir() {
  integer l=$#LBUFFER
  zle self-insert
  (( $l >= $#LBUFFER )) && LBUFFER[-1]=" $LBUFFER[-1]"
}
zle -N self-insert-redir
for op in \| \< \> \& ; do
  bindkey "$op" self-insert-redir
done
setopt notify

# Automatically quote URLs when pasted
autoload -U url-quote-magic
zle -N self-insert url-quote-magic

# ========= Ergonomic Command Aliases =========
alias mv='mv -i'
alias ln='ln -i'
alias mkdir='mkdir -p -v'
for c in cp rm chmod chown rename; do
  alias $c="$c -v"
done

# Use human-readable format for disk space, when available
if _try df -H ~; then
  alias df='df -H'
elif _try df -h ~; then
  alias df='df -h'
fi

# Colorize output of ls if possible
if _try ls --color; then
  alias ls='ls --color'
fi

# Set default pager to less with appropriate options
if _has less; then
  export PAGER=less
  export LESS='-Ri'
fi