diff --git a/modules/prompt/functions/prompt_minimal_setup b/modules/prompt/functions/prompt_minimal_setup
index 4cd791c..fc7bba1 100644
--- a/modules/prompt/functions/prompt_minimal_setup
+++ b/modules/prompt/functions/prompt_minimal_setup
@@ -7,7 +7,7 @@
 #
 
 function +vi-git-status() {
-  # Untracked files.
+  # Check for untracked files or updated submodules since vcs_info does not.
   if [[ -n $(git ls-files --other --exclude-standard 2> /dev/null) ]]; then
     hook_com[unstaged]='%F{red}●%f'
   fi
@@ -22,11 +22,14 @@ function prompt_minimal_setup {
   unsetopt XTRACE KSH_ARRAYS
   prompt_opts=(cr percent subst)
 
+  # Load required functions.
   autoload -Uz add-zsh-hook
   autoload -Uz vcs_info
 
+  # Add hook for calling vcs_info before each command.
   add-zsh-hook precmd prompt_minimal_precmd
 
+  # Set vcs_info parameters.
   zstyle ':vcs_info:*' enable bzr git hg svn
   zstyle ':vcs_info:*' check-for-changes true
   zstyle ':vcs_info:*' stagedstr '%F{green}●%f'
@@ -36,6 +39,7 @@ function prompt_minimal_setup {
   zstyle ':vcs_info:(sv[nk]|bzr):*' branchformat '%b|%F{cyan}%r%f'
   zstyle ':vcs_info:git*+set-message:*' hooks git-status
 
+  # Define prompts.
   PROMPT='%2~${vcs_info_msg_0_} » '
 }
 
diff --git a/modules/prompt/functions/prompt_nicoulaj_setup b/modules/prompt/functions/prompt_nicoulaj_setup
index 3b36c84..37f55a6 100644
--- a/modules/prompt/functions/prompt_nicoulaj_setup
+++ b/modules/prompt/functions/prompt_nicoulaj_setup
@@ -25,7 +25,7 @@ function prompt_nicoulaj_setup {
   unsetopt XTRACE KSH_ARRAYS
   prompt_opts=(cr percent subst)
 
-  # Load required modules.
+  # Load required functions.
   autoload -Uz add-zsh-hook
   autoload -Uz vcs_info
 
@@ -42,7 +42,7 @@ function prompt_nicoulaj_setup {
 
   # Set vcs_info parameters.
   zstyle ':vcs_info:*' enable bzr git hg svn
-  zstyle ':vcs_info:*:*' check-for-changes true # Can be slow on big repos.
+  zstyle ':vcs_info:*:*' check-for-changes true
   zstyle ':vcs_info:*:*' unstagedstr '!'
   zstyle ':vcs_info:*:*' stagedstr '+'
   zstyle ':vcs_info:*:*' actionformats "%S" "%r/%s/%b %u%c (%a)"
diff --git a/modules/prompt/functions/prompt_sorin_setup b/modules/prompt/functions/prompt_sorin_setup
index 152b708..d1db67c 100644
--- a/modules/prompt/functions/prompt_sorin_setup
+++ b/modules/prompt/functions/prompt_sorin_setup
@@ -1,5 +1,5 @@
 #
-# A simple theme that only shows relevant information.
+# A simple theme that displays relevant, contextual information.
 #
 # Authors:
 #   Sorin Ionescu <sorin.ionescu@gmail.com>
@@ -22,7 +22,10 @@ function prompt_sorin_setup {
   unsetopt XTRACE KSH_ARRAYS
   prompt_opts=(cr percent subst)
 
+  # Load required functions.
   autoload -Uz add-zsh-hook
+
+  # Add hook for calling git-info before each command.
   add-zsh-hook precmd prompt_sorin_precmd
 
   zstyle ':omz:module:editor' completing '%B%F{red}...%f%b'
@@ -45,6 +48,7 @@ function prompt_sorin_setup {
     'prompt'  ' %F{blue}git%f$(coalesce "%b" "%p" "%c")%s' \
     'rprompt' '%A%B%S%a%d%m%r%U%u'
 
+  # Define prompts.
   PROMPT='%F{cyan}%1~%f${git_info:+${(e)git_info[prompt]}} %(!.%B%F{red}#%f%b.%B%F{green}❯%f%b) '
   RPROMPT='${editor_info[keymap]}${editor_info[overwrite]}%(?:: %F{red}⏎%f)${VIM:+" %B%F{green}V%f%b"}${git_info[rprompt]}'
   SPROMPT='zsh: correct %F{red}%R%f to %F{green}%r%f [nyae]? '