fix(skills): open sprint tabs in current window, no duplicate main tab

start-sprint.sh now uses --tab for all teams (opens in active Ptyxis
window) instead of --new-window. No separate main tab — the caller
is already on main.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/sprint-start/scripts/start-sprint.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
-# Opens Ptyxis windows for the active sprint teams.
+# Opens Ptyxis tabs for the active sprint teams in the CURRENT window.
 # Auto-starts Claude Code in each tab via tmux.
 #
 # Usage: start-sprint.sh [sprint-number]
 #   If omitted, auto-detects the active sprint from the database.
 #
-# Window 1:  main (always)
-# Window 2:  one tab per active team with open tickets
+# Assumes the caller is already on main in the current terminal.
+# Adds one tab per active team — no duplicate main tab.
 #
 # Worktrees are created under .sprint/ (ephemeral, cleaned after sprint close).
 # Can be called from any directory — resolves paths from the script location.
@@ -39,12 +39,9 @@ fi
 
 echo "Sprint $SPRINT — teams: ${TEAMS:-none}"
 
-# ── Window 1: main (always) ─────────────────────────────────────────
-ptyxis --new-window -d "$REPO_ROOT" -x 'tmux new-session \; send-keys claude Enter'
-sleep 0.5
-
-# ── Window 2: one tab per active team ───────────────────────────────
-first=true
+# ── Open team tabs in the CURRENT window ────────────────────────────
+# No separate main tab — the caller is already on main.
+# All team tabs open as --tab in the active Ptyxis window.
 for team in $TEAMS; do
   BRANCH="sprint-${SPRINT}/${team}"
   WDIR="$PARENT/.sprint/sprint-${SPRINT}/${team}"
@@ -61,12 +58,7 @@ for team in $TEAMS; do
     fi
   fi
 
-  if $first; then
-    ptyxis --new-window -d "$WDIR" -x 'tmux new-session \; send-keys claude Enter'
-    first=false
-  else
-    ptyxis --tab -d "$WDIR" -x 'tmux new-session \; send-keys claude Enter'
-  fi
+  ptyxis --tab -d "$WDIR" -x 'tmux new-session \; send-keys claude Enter'
   sleep 0.3
 done