diff --git a/modules/completion/init.zsh b/modules/completion/init.zsh
index de59a5d2..c33c0f77 100644
--- a/modules/completion/init.zsh
+++ b/modules/completion/init.zsh
@@ -96,7 +96,7 @@ zstyle ':completion::*:(-command-|export):*' fake-parameters ${${${_comps[(I)-va
 
 # Populate hostname completion.
 zstyle -e ':completion:*:hosts' hosts 'reply=(
-  ${=${${(f)"$(cat {/etc/ssh_,~/.ssh/known_}hosts(|2)(N) 2>/dev/null)"}%%[#| ]*}//,/ }
+  ${=${=${=${${(f)"$(cat {/etc/ssh_,~/.ssh/known_}hosts(|2)(N) 2>/dev/null)"}%%[#| ]*}//\]:[0-9]*/ }//,/ }//\[/ }
   ${=${(f)"$(cat /etc/hosts(|)(N) <<(ypcat hosts 2>/dev/null))"}%%\#*}
   ${=${${${${(@M)${(f)"$(cat ~/.ssh/config 2>/dev/null)"}:#Host *}#Host }:#*\**}:#*\?*}}
 )'
diff --git a/modules/editor/init.zsh b/modules/editor/init.zsh
index 53292923..ae253f25 100644
--- a/modules/editor/init.zsh
+++ b/modules/editor/init.zsh
@@ -270,10 +270,6 @@ bindkey -M vicmd "v" edit-command-line
 bindkey -M vicmd "u" undo
 bindkey -M vicmd "$key_info[Control]R" redo
 
-# Switch to command mode.
-bindkey -M viins "jk" vi-cmd-mode
-bindkey -M viins "kj" vi-cmd-mode
-
 if (( $+widgets[history-incremental-pattern-search-backward] )); then
   bindkey -M vicmd "?" history-incremental-pattern-search-backward
   bindkey -M vicmd "/" history-incremental-pattern-search-forward
diff --git a/modules/git/README.md b/modules/git/README.md
index 806bc9ca..6eeb3216 100644
--- a/modules/git/README.md
+++ b/modules/git/README.md
@@ -56,6 +56,7 @@ Aliases
   - `gcO` checks out paths to work tree using the *HEAD* commit.
   - `gcf` amends the tip of the current branch using the same log message as
     *HEAD*.
+  - `gcF` amends the tip of the current branch.
   - `gcp` applies changes introduced by existing commits.
   - `gcP` applies changes introduced by existing commits without committing.
   - `gcr` reverts existing commits by reverting patches and recording new
@@ -292,7 +293,7 @@ Second, format how the above attributes are displayed in prompts.
       'prompt'  ' git(%b)' \
       'rprompt' '[%R]'
 
-Last, add `$git_info[prompt]` to `$PROMPT` and `$git_info[prompt]` to
+Last, add `$git_info[prompt]` to `$PROMPT` and `$git_info[rprompt]` to
 `$RPROMPT` respectively and call `git-info` in the `prompt_name_preexec` hook
 function.
 
diff --git a/modules/git/alias.zsh b/modules/git/alias.zsh
index 8d84d923..9af1c8a7 100644
--- a/modules/git/alias.zsh
+++ b/modules/git/alias.zsh
@@ -48,6 +48,7 @@ alias gcm='git commit --message'
 alias gco='git checkout'
 alias gcO='git checkout HEAD --'
 alias gcf='git commit --amend --reuse-message HEAD'
+alias gcF='git commit --amend'
 alias gcp='git cherry-pick --ff'
 alias gcP='git cherry-pick --no-commit'
 alias gcr='git revert'
diff --git a/modules/gnu-utility/README.md b/modules/gnu-utility/README.md
index b0dc1eed..b3b6ded1 100644
--- a/modules/gnu-utility/README.md
+++ b/modules/gnu-utility/README.md
@@ -7,8 +7,8 @@ Installing GNU utilities on non-GNU systems in `$PATH` without a prefix, i.e.
 `ls` instead of `gls`, is not recommended since scripts that target other
 utilities will be broken.
 
-However, for interactive use, prefixed commands can be wrapped in their
-non-prefixed counterparts.
+This module wraps GNU utilities in functions without a prefix for interactive
+use.
 
 This module must be loaded **before** the *utility* module.
 
diff --git a/modules/prompt/functions/prompt_giddie_setup b/modules/prompt/functions/prompt_giddie_setup
index 07b7d51d..20d7dd2a 100644
--- a/modules/prompt/functions/prompt_giddie_setup
+++ b/modules/prompt/functions/prompt_giddie_setup
@@ -1,48 +1,45 @@
 #
 # A colourful, friendly, multiline theme with some handy features:
 #
-# * Simple VCS branch, staged, and unstaged indication.
-# * Prompt character is different in a VCS repository.
-# * Last command exit status is displayed clearly if it was non-zero.
-#
-# This theme is particularly well-suited to the pastel colours used by KDE's
-# Konsole terminal emulator.
-#
-# Screenshot: http://i.imgur.com/rCo3S.png
-#
 # Authors:
 #   Paul Gideon Dann <pdgiddie@gmail.com>
 #
-
-# TODO: Currently only tailored to git.
+# Features:
+#   - Simple VCS branch, staged, and unstaged indication.
+#   - Prompt character is different in a VCS repository.
+#   - Last command exit status is displayed when non-zero.
+#
+# Screenshots:
+#   http://i.imgur.com/rCo3S.png
+#
 
 function prompt_giddie_precmd {
-  vcs_info
-
   # Replace "/home/<user>" with "~"
-  prompt_custom_wd=${PWD/#$HOME/\~}
+  _prompt_giddie_pwd="${PWD/#$HOME/~}"
 
-  # Choose prompt symbol based on whether on not we're in a repository.
-  { git branch 2>&1 } >/dev/null
-  if (( $? == 0 )); then
-    prompt_symbol='±'
+  # Choose prompt symbol based on whether or not we are in a repository.
+  if (( $+commands[git] )) && git rev-parse 2> /dev/null; then
+    _prompt_giddie_symbol='±'
+    vcs_info
   else
-    prompt_symbol=')'
+    _prompt_giddie_symbol=')'
   fi
-
-  # This will be displayed additionally if the last exit status was non-zero.
-  prompt_exit_status="%F{red}%B-> [%?]%b%f"
 }
 
 function prompt_giddie_setup {
+  setopt LOCAL_OPTIONS
+  unsetopt XTRACE KSH_ARRAYS
+  prompt_opts=(cr percent subst)
+
+  # Load required functions.
   autoload -Uz vcs_info
   autoload -Uz add-zsh-hook
-  add-zsh-hook precmd prompt_giddie_precmd
 
-  prompt_opts=(cr percent subst)
+  # Add hook to call our function before each command
+  add-zsh-hook precmd prompt_giddie_precmd
 
-  zstyle ':omz:completion' indicator '%F{green}...%f'
-  zstyle ':omz:prompt' vicmd '%F{yellow}--- VI-COMMAND ---%f'
+  zstyle ':prezto:module:editor:info:completing' format '%F{green}...%f'
+  zstyle ':prezto:module:editor:info:keymap:alternate' format '%F{yellow}--- VI-COMMAND ---%f'
   zstyle ':vcs_info:*' enable git
   zstyle ':vcs_info:*' check-for-changes true
   zstyle ':vcs_info:*' formats ' on %F{magenta}%b%f%c%u'
@@ -50,13 +47,13 @@ function prompt_giddie_setup {
   zstyle ':vcs_info:*' stagedstr '%F{green}+%f'
   zstyle ':vcs_info:*' unstagedstr '%F{green}!%f'
 
-  PROMPT='%(?..${prompt_exit_status}
-)%F{magenta}%n%f@%F{yellow}%m%f|%F{green}${prompt_custom_wd}%f${vcs_info_msg_0_}
-%F{blue}${prompt_symbol}%f '
+  # Define prompts.
+  PROMPT='%(?..%F{red}%B-> [%?]%b%f
+)%F{magenta}%n%f@%F{yellow}%m%f|%F{green}${_prompt_giddie_pwd}%f${vcs_info_msg_0_}
+%F{blue}${_prompt_giddie_symbol}%f '
   RPROMPT=
   SPROMPT='zsh: correct %F{magenta}%R%f to %F{green}%r%f [nyae]? '
 }
 
 prompt_giddie_setup "$@"
 
-# vim: ft=zsh
diff --git a/modules/ruby/init.zsh b/modules/ruby/init.zsh
index b5ab77d0..b287cbb2 100644
--- a/modules/ruby/init.zsh
+++ b/modules/ruby/init.zsh
@@ -17,11 +17,11 @@ if [[ -s "$HOME/.rvm/scripts/rvm" ]]; then
 # Load manually installed rbenv into the shell session.
 elif [[ -s "$HOME/.rbenv/bin/rbenv" ]]; then
   path=("$HOME/.rbenv/bin" $path)
-  eval "$(rbenv init - zsh)"
+  eval "$(rbenv init - --no-rehash zsh)"
 
 # Load package manager installed rbenv into the shell session.
 elif (( $+commands[rbenv] )); then
-  eval "$(rbenv init - zsh)"
+  eval "$(rbenv init - --no-rehash zsh)"
 
 # Install local gems according to operating system conventions.
 else
diff --git a/runcoms/zlogin b/runcoms/zlogin
index 9e315775..e27e2332 100644
--- a/runcoms/zlogin
+++ b/runcoms/zlogin
@@ -9,7 +9,7 @@
 {
   # Compile the completion dump to increase startup speed.
   zcompdump="${ZDOTDIR:-$HOME}/.zcompdump"
-  if [[ "$zcompdump" -nt "${zcompdump}.zwc" || ! -s "${zcompdump}.zwc" ]]; then
+  if [[ -s "$zcompdump" && (! -s "${zcompdump}.zwc" || "$zcompdump" -nt "${zcompdump}.zwc") ]]; then
     zcompile "$zcompdump"
   fi