diff --git a/claude/releases/index.json b/claude/releases/index.json
index 94819ce..68a3f66 100755
--- a/claude/releases/index.json
+++ b/claude/releases/index.json
@@ -1,6 +1,13 @@
 {
-  "latest": "2.1.119",
+  "latest": "2.1.120",
   "releases": [
+    {
+      "version": "2.1.120",
+      "date": "2026-04-26",
+      "patches": 9,
+      "status": "stable",
+      "install_type": "sea_binary"
+    },
     {
       "version": "2.1.119",
       "date": "2026-04-24",
diff --git a/claude/uclaude_install.sh b/claude/uclaude_install.sh
index 017ec3a..2d43fda 100755
--- a/claude/uclaude_install.sh
+++ b/claude/uclaude_install.sh
@@ -216,14 +216,21 @@ if [ -n "$CLAUDE_BIN" ] && [ -f "$CLAUDE_BIN" ]; then
             fi
             ;;
         claude.exe|claude)
-            # SEA binary — grep -a treats binary as text
+            # SEA binary — grep -a treats binary as text. Three required
+            # markers that gate user-visible features:
+            #   ae1: /model picker shows custom models from availableModels
+            #   ae2: picker accepts non-"anthropic.*"-prefixed models
+            #   ae3: Agent.model accepts gpt-5.5/glm-5.1 (not just sonnet/opus/haiku)
             sea_ok=true
-            grep -aq '/\*ae1_models_filter_patched' "$CLAUDE_BIN" 2>/dev/null || sea_ok=false
-            grep -aq '/\*bypass_permissions_prompt' "$CLAUDE_BIN" 2>/dev/null || sea_ok=false
+            missing=""
+            grep -aq '/\*ae1_models_filter_patched' "$CLAUDE_BIN" 2>/dev/null || { sea_ok=false; missing="$missing ae1"; }
+            grep -aq '/\*ae2_anthropic_unfilter'    "$CLAUDE_BIN" 2>/dev/null || { sea_ok=false; missing="$missing ae2"; }
+            grep -aq '/\*ae3_subagent_model'        "$CLAUDE_BIN" 2>/dev/null || { sea_ok=false; missing="$missing ae3"; }
+            grep -aq '/\*bypass_permissions_prompt' "$CLAUDE_BIN" 2>/dev/null || { sea_ok=false; missing="$missing bypass"; }
             if $sea_ok; then
-                echo "    SEA binary:  OK (ae1_models_filter + bypass_permissions markers)"
+                echo "    SEA binary:  OK (ae1 + ae2 + ae3 + bypass_permissions markers)"
             else
-                echo "    SEA binary:  ⚠ NOT fully patched ($CLAUDE_BIN — re-run uclaude_updater.py --force)"
+                echo "    SEA binary:  ⚠ NOT fully patched (missing:$missing) — re-run uclaude_updater.py --force"
             fi
             ;;
         *)