setup

The user invoked /imagegen:setup (also reachable as /imagegen setup). Run these steps in order, reporting clearly at each one:

Step 1 — Codex on PATH (auto-install if missing)

Run codex --version via Bash.

• If it succeeds, note the version and continue to Step 2.
• If it fails with "command not found" / ENOENT, try to install Codex automatically.

Before attempting auto-install, verify npm is available. Run command -v npm (or npm --version). If npm is missing, tell the user: "I need Node.js + npm to install Codex CLI. Install Node 18+ from https://nodejs.org, then re-run /imagegen setup." Stop.

If npm is present, tell the user one short sentence ("Codex CLI not found — installing it via npm now, this takes 30–90 seconds…") and run, with timeout_ms = 300000 (5 minutes):

npm install -g @openai/codex 2>&1

After it returns:

• Success path: re-run codex --version. If it now succeeds, note the version and continue to Step 2.
• Permission error — output contains EACCES, permission denied, Access is denied, or similar: tell the user:

  "Auto-install needs elevated permissions. Open a terminal as Administrator (Windows) or run sudo npm install -g @openai/codex (macOS/Linux), then re-run /imagegen setup." Stop.

• Other failure (network error, registry timeout, etc.): surface the relevant tail of the npm output verbatim, suggest manual install, and stop.

Step 2 — Codex auth

Run codex login status via Bash.

If output contains "Logged in" (any form): note the auth method ("ChatGPT" or "API key") and continue to Step 3.

If output is "Not logged in": auto-launch the sign-in flow in a new terminal window and poll for completion. Tell the user one short sentence first ("Opening a browser sign-in window — complete it and I'll continue automatically"), then run this one Bash command with timeout_ms = 240000 (4 minutes):

# Spawn codex login in a new visible terminal so the user can interact with it
OS=$(uname -s 2>/dev/null || echo unknown)
case "$OS" in
  MINGW*|MSYS*|CYGWIN*)
    powershell -NoProfile -Command "Start-Process cmd -ArgumentList '/k','codex','login'" ;;
  Darwin)
    osascript -e 'tell application "Terminal" to do script "codex login"' >/dev/null ;;
  Linux)
    (x-terminal-emulator -e codex login &) 2>/dev/null \
      || (gnome-terminal -- codex login &) 2>/dev/null \
      || (xterm -e codex login &) 2>/dev/null \
      || (codex login &) ;;
  *)
    codex login & ;;
esac

# Poll codex login status every 5s for up to 3 minutes.
# Anchor on start-of-line so "Logged in" doesn't false-match inside "Not logged in".
for i in $(seq 1 36); do
  status=$(codex login status 2>&1)
  if echo "$status" | grep -qiE '^[[:space:]]*Logged in'; then
    echo "AUTH_COMPLETE"
    echo "$status"
    exit 0
  fi
  sleep 5
done
echo "AUTH_TIMEOUT"
codex login status