Use a custom terminfo entry for italics.

.alacritty.yml

@@ -1,23 +1,23 @@
-dynamic_title: true
+dynamic_title: false
 hide_cursor_when_typing: true
 cursor_style: Block
 unfocused_hollow_cursor: true
 live_config_reload: true
 render_timer: false
-background_opacity: 0.965
+background_opacity: 0.9
 custom_cursor_colors: false
 tabspaces: 8
 
 env:
-  TERM: xterm-256color
+  TERM: tmux-256color-italic
 
 window:
   dimensions:
     columns: 80
     lines: 24
 
   padding:
-    x: 6
+    x: 9
     y: 6
 
   decorations: full
@@ -91,7 +91,7 @@ mouse:
 
 selection:
   semantic_escape_chars: ",│`|:\"' ()[]{}<>"
-  save_to_clipboard: false
+  save_to_clipboard: true
 
 key_bindings:
   - { key: Space,    mods: Control, chars: "\x1b"                        }

.config/fish/functions/fish_prompt.fish

@@ -1,9 +1,11 @@
 function fish_prompt
-  set prompt (echo $PWD | grep -Eo '([^/]+)?/([^/]+)?$')
+  set -l prompt (echo $PWD | grep -Eo '([^/]+)?/([^/]+)?$')
 
   which arcus > /dev/null 2>&1
-  if test "$status" -a -n "$fish_color_cwd_fade_to"
+  if test $status -a -n "$fish_color_cwd_fade_to"
+    set_color -i
     echo -n $prompt | arcus $fish_color_cwd $fish_color_cwd_fade_to
+    set_color normal
   else
     set_color $fish_color_cwd
     echo -n $prompt

.hovel/install.sh

@@ -38,3 +38,5 @@ if [ $? -a "$SHELL" != "$newsh" ]; then
   echo "Changing shell to '$newsh'"
   chsh -s $newsh
 fi
+
+tic ~/.hovel/tmux-256color-italic.terminfo

.hovel/tmux-256color-italic.terminfo

@@ -0,0 +1,4 @@
+tmux-256color-italic|tmux with 256 color and italic support,
+  sitm=\E[3m, ritm=\E[23m,
+  use=xterm-256color,
+  use=screen-256color,

.tmux.conf

@@ -1,7 +1,8 @@
 set -g prefix C-a
 
-# Ensure proper colors and neovim cursor.
-set -ga terminal-overrides "xterm-256color:Tc,screen-256color:Tc"
+# Enable truecolor and bar cursors
+set -g default-terminal "tmux-256color-italic"
+set -ga terminal-overrides "tmux-256color-italic:Tc"
 set -ga terminal-overrides ',*:Ss=\E[%p1%d q:Se=\E[2 q'
 
 set -g pane-base-index 1