orchestrator: restore opencode web launcher

cc-ci-plan/launch-orchestrator.py

@@ -31,7 +31,7 @@ Env:
      the session title in the web UI is the SESSION name)
 """
 
-import os, sys, subprocess
+import json, os, shlex, sys, subprocess
 from datetime import datetime
 from pathlib import Path
 
@@ -147,9 +147,15 @@ def start(mode="resume"):
             die(f"opencode not found at {OPENCODE_BIN}")
         # Attach the orchestrator TUI to the shared opencode web server so it shows up in the
         # same project/session listing as browser-created sessions.
+        model_env = ""
+        if LOOP_MODEL:
+            # attach has no --model flag, so inject a one-off config overlay for this session.
+            model_env = (
+                f"OPENCODE_CONFIG_CONTENT={shlex.quote(json.dumps({'model': LOOP_MODEL}))} "
+            )
         cmd = (
             f"set -a; . /srv/cc-ci/.testenv; set +a; "
-            f"NO_COLOR=1 {OPENCODE_BIN} attach {OPENCODE_SERVER} --dir {WORKDIR}"
+            f"{model_env}NO_COLOR=1 {OPENCODE_BIN} attach {OPENCODE_SERVER} --dir {shlex.quote(WORKDIR)}"
         )
         log(f"starting {SESSION} (backend=opencode, model={LOOP_MODEL or 'default'})")
         log(f"  visible at http://oc.commoninternet.net (tailnet only)")