Rebrand as Playpen.

shot.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Run vtabs inside a throwaway headless Sway and screenshot it.
+# Run playpen inside a throwaway headless Sway and screenshot it.
 #
 # This keeps UI checks out of the developer's real Wayland session: nothing
 # pops up on screen, and it works even while the session is locked.
@@ -8,7 +8,7 @@
 set -u
 
 cd "$(dirname "$0")"
-OUT="${1:-/tmp/vtabs-shot.png}"
+OUT="${1:-/tmp/playpen-shot.png}"
 KEYS="${2:-}"
 SETTLE="${3:-2}"
 
@@ -23,14 +23,14 @@ CONF
 
 # The nix dev shell exports bash functions into the environment. Any /bin/sh
 # the terminal's child spawns tries to import them and spews parse errors that
-# have nothing to do with vtabs, so drop them just before exec.
+# have nothing to do with playpen, so drop them just before exec.
 cat > "$RUNDIR/launch.sh" <<'LAUNCH'
 #!/usr/bin/env bash
 while read -r fn; do unset -f "$fn" 2>/dev/null; done < <(declare -Fx | awk '{print $3}')
-exec "$VTABS_BIN"
+exec "$PLAYPEN_BIN"
 LAUNCH
 chmod +x "$RUNDIR/launch.sh"
-export VTABS_BIN="$PWD/zig-out/bin/vtabs"
+export PLAYPEN_BIN="$PWD/zig-out/bin/playpen"
 
 export WLR_BACKENDS=headless
 export WLR_LIBINPUT_NO_DEVICES=1
@@ -96,7 +96,7 @@ if [ -n "$KEYS" ]; then
   sleep 1.5
 fi
 
-if [ -n "${VTABS_SHOT_DEBUG:-}" ]; then
+if [ -n "${PLAYPEN_SHOT_DEBUG:-}" ]; then
   echo "--- swaymsg get_tree (apps) ---" >&2
   swaymsg -t get_tree 2>&1 | grep -E '"(app_id|name|pid)"' | head -30 >&2
   echo "--- sway log ---" >&2