start-comfyui: nohup fallback when tmux unavailable; parameterize port-forward

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/local/port-forward.sh

@@ -1,11 +1,13 @@
 #!/bin/bash
-# Persistent port forward: localhost:8188 -> pod ComfyUI.
+# Persistent port forward: localhost:$LOCAL_PORT -> pod ComfyUI (8188).
 # Auto-reconnects if the tunnel drops. Ctrl-C to stop.
-# Requires the echelon key loaded in your ssh agent.
-POD_HOST=216.243.220.136
-POD_PORT=17561
+# Defaults to the B200 pod; override for others, e.g. the RTX 4090:
+#   POD_HOST=213.173.102.163 POD_PORT=20497 LOCAL_PORT=8189 port-forward.sh
+POD_HOST=${POD_HOST:-216.243.220.136}
+POD_PORT=${POD_PORT:-17561}
+LOCAL_PORT=${LOCAL_PORT:-8188}
 while true; do
-  ssh -N -L 8188:127.0.0.1:8188 \
+  ssh -N -L "$LOCAL_PORT":127.0.0.1:8188 \
     -o ServerAliveInterval=30 -o ServerAliveCountMax=3 \
     -o ExitOnForwardFailure=yes \
     -o StrictHostKeyChecking=accept-new \

scripts/pod/start-comfyui.sh

@@ -1,16 +1,21 @@
 #!/bin/bash
-# Start ComfyUI headless on the pod inside tmux, listening on 127.0.0.1:8188.
+# Start ComfyUI headless on the pod, listening on 127.0.0.1:8188.
+# Uses tmux when available (attachable session), else nohup.
 # Access from your laptop via scripts/local/port-forward.sh
 set -euo pipefail
 
-SESSION=comfyui
 LOG=/workspace/minimax-h3/comfyui.log
 
-if tmux has-session -t "$SESSION" 2>/dev/null; then
-  echo "ComfyUI tmux session already running"
+if pgrep -f "python3? main.py" >/dev/null; then
+  echo "ComfyUI already running"
   exit 0
 fi
 
-tmux new -s "$SESSION" -d \
-  "cd /ComfyUI && python main.py --listen 127.0.0.1 --port 8188 2>&1 | tee -a $LOG"
+if command -v tmux >/dev/null; then
+  tmux new -s comfyui -d \
+    "cd /ComfyUI && python3 main.py --listen 127.0.0.1 --port 8188 2>&1 | tee -a $LOG"
+else
+  cd /ComfyUI
+  nohup python3 main.py --listen 127.0.0.1 --port 8188 >>"$LOG" 2>&1 &
+fi
 echo "started; tail $LOG"