feat(macos): add Canvas A2UI renderer

vendor/a2ui/specification/0.9/validate.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+SCHEMA_DIR="/Users/gspencer/code/a2ui/specification/0.9"
+SERVER_SCHEMA="${SCHEMA_DIR}/server_to_client.json"
+COMMON_TYPES="${SCHEMA_DIR}/common_types.json"
+COMPONENT_CATALOG="${SCHEMA_DIR}/component_catalog.json"
+EXAMPLE_FILE="${SCHEMA_DIR}/contact_form_example.jsonl"
+TEMP_FILE="${SCHEMA_DIR}/temp_message.json"
+
+while read -r line; do
+  echo "$line" | jq '.' > "${TEMP_FILE}"
+  if [ $? -ne 0 ]; then
+    echo "jq failed to parse line: $line"
+    continue
+  fi
+  ajv validate --verbose -s "${SERVER_SCHEMA}" -r "${COMMON_TYPES}" -r "${COMPONENT_CATALOG}" --spec=draft2020 -d "${TEMP_FILE}"
+  if [ $? -ne 0 ]; then
+    echo "Validation failed for line: $line"
+  fi
+done < "${EXAMPLE_FILE}"
+
+rm "${TEMP_FILE}"
+
+echo "Validation complete."