diff --git a/scripts/deploy_light.sh b/scripts/deploy_light.sh
index 4c5910f..f33ee47 100755
--- a/scripts/deploy_light.sh
+++ b/scripts/deploy_light.sh
@@ -302,10 +302,10 @@ resolve_opencode_bin() {
   die "opencode binary not found in PATH: $OPENCODE_BIN"
 }
 
-run_python_http_check() {
+run_python_http_check_with() {
   local url="$1"
-  if command -v python3 >/dev/null 2>&1; then
-    python3 - "$url" <<'PY'
+  shift
+  "$@" - "$url" <<'PY'
 import json
 import sys
 import urllib.request
@@ -318,37 +318,19 @@ with urllib.request.urlopen(url, timeout=1.5) as response:
     if body:
         json.loads(body)
 PY
-    return 0
+}
+
+run_python_http_check() {
+  local url="$1"
+  if command -v python3 >/dev/null 2>&1; then
+    run_python_http_check_with "$url" python3
+    return
   fi
   if command -v python >/dev/null 2>&1; then
-    python - "$url" <<'PY'
-import json
-import sys
-import urllib.request
-
-url = sys.argv[1]
-with urllib.request.urlopen(url, timeout=1.5) as response:
-    if response.status != 200:
-        raise SystemExit(1)
-    body = response.read().decode("utf-8")
-    if body:
-        json.loads(body)
-PY
-    return 0
+    run_python_http_check_with "$url" python
+    return
   fi
-  uv run python - "$url" <<'PY'
-import json
-import sys
-import urllib.request
-
-url = sys.argv[1]
-with urllib.request.urlopen(url, timeout=1.5) as response:
-    if response.status != 200:
-        raise SystemExit(1)
-    body = response.read().decode("utf-8")
-    if body:
-        json.loads(body)
-PY
+  run_python_http_check_with "$url" uv run python
 }
 
 wait_for_http_ready() {
diff --git a/src/opencode_a2a_server/extension_contracts.py b/src/opencode_a2a_server/extension_contracts.py
index 38cbf28..dc7a8fb 100644
--- a/src/opencode_a2a_server/extension_contracts.py
+++ b/src/opencode_a2a_server/extension_contracts.py
@@ -3,7 +3,6 @@
 from dataclasses import dataclass
 from typing import Any
 
-SHARED_METADATA_NAMESPACE = "shared"
 SHARED_SESSION_BINDING_FIELD = "metadata.shared.session.id"
 SHARED_SESSION_METADATA_FIELD = "metadata.shared.session"
 SHARED_MODEL_SELECTION_FIELD = "metadata.shared.model"