Create a developer folder and add samples.

PiperOrigin-RevId: 755885332

contributing/samples/bigquery_agent/README.md

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+# OAuth Sample
+
+## Introduction
+
+This sample tests and demos the OAuth support in ADK via two tools:
+
+* 1. bigquery_datasets_list:
+
+    List user's datasets.
+
+* 2. bigquery_datasets_get:
+    Get a dataset's details.
+
+* 3. bigquery_datasets_insert:
+    Create a new dataset.
+
+* 4. bigquery_tables_list:
+    List all tables in a dataset.
+
+* 5. bigquery_tables_get:
+    Get a table's details.
+
+* 6. bigquery_tables_insert:
+    Insert a new table into a dataset.
+
+## How to use
+
+* 1. Follow https://developers.google.com/identity/protocols/oauth2#1.-obtain-oauth-2.0-credentials-from-the-dynamic_data.setvar.console_name. to get your client id and client secret.
+  Be sure to choose "web" as your client type.
+
+* 2. Configure your .env file to add two variables:
+
+  * GOOGLE_CLIENT_ID={your client id}
+  * GOOGLE_CLIENT_SECRET={your client secret}
+
+  Note: done't create a separate .env , instead put it to the same .env file that stores your Vertex AI or Dev ML credentials
+
+* 3. Follow https://developers.google.com/identity/protocols/oauth2/web-server#creatingcred to add http://localhost/dev-ui to "Authorized redirect URIs".
+
+  Note: localhost here is just a hostname that you use to access the dev ui, replace it with the actual hostname you use to access the dev ui.
+
+* 4. For 1st run, allow popup for localhost in Chrome.
+
+## Sample prompt
+
+* `Do I have any datasets in project sean-dev-agent ?`
+* `Do I have any tables under it ?`
+* `could you get me the details of this table ?`
+* `Can you help to create a new dataset in the same project? id : sean_test , location: us`
+* `could you show me the details of this new dataset ?`
+* `could you create a new table under this dataset ? table name : sean_test_table. column1 : name is id , type is integer, required. column2 : name is info , type is string, required. column3 : name is backup , type is string, optional.`

contributing/samples/bigquery_agent/__init__.py

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+# 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
+#
+#     http://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.
+
+from . import agent

contributing/samples/bigquery_agent/agent.py

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+# 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
+#
+#     http://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.
+
+import os
+
+from dotenv import load_dotenv
+from google.adk import Agent
+from google.adk.tools.google_api_tool import bigquery_tool_set
+
+# Load environment variables from .env file
+load_dotenv()
+
+# Access the variable
+oauth_client_id = os.getenv("OAUTH_CLIENT_ID")
+oauth_client_secret = os.getenv("OAUTH_CLIENT_SECRET")
+bigquery_tool_set.configure_auth(oauth_client_id, oauth_client_secret)
+
+bigquery_datasets_list = bigquery_tool_set.get_tool("bigquery_datasets_list")
+bigquery_datasets_get = bigquery_tool_set.get_tool("bigquery_datasets_get")
+bigquery_datasets_insert = bigquery_tool_set.get_tool(
+    "bigquery_datasets_insert"
+)
+
+bigquery_tables_list = bigquery_tool_set.get_tool("bigquery_tables_list")
+bigquery_tables_get = bigquery_tool_set.get_tool("bigquery_tables_get")
+bigquery_tables_insert = bigquery_tool_set.get_tool("bigquery_tables_insert")
+
+
+root_agent = Agent(
+    model="gemini-2.0-flash",
+    name="bigquery_agent",
+    instruction="""
+      You are a helpful Google BigQuery agent that help to manage users' data on Goolge BigQuery.
+      Use the provided tools to conduct various operations on users' data in Google BigQuery.
+
+      Scenario 1:
+      The user wants to query their biguqery datasets
+      Use bigquery_datasets_list to query user's datasets
+
+      Scenario 2:
+      The user wants to query the details of a specific dataset
+      Use bigquery_datasets_get to get a dataset's details
+
+      Scenario 3:
+      The user wants to create a new dataset
+      Use bigquery_datasets_insert to create a new dataset
+
+      Scenario 4:
+      The user wants to query their tables in a specific dataset
+      Use bigquery_tables_list to list all tables in a dataset
+
+      Scenario 5:
+      The user wants to query the details of a specific table
+      Use bigquery_tables_get to get a table's details
+
+      Scenario 6:
+      The user wants to insert a new table into a dataset
+      Use bigquery_tables_insert to insert a new table into a dataset
+
+      Current user:
+      <User>
+      {userInfo?}
+      </User>
+""",
+    tools=[
+        bigquery_datasets_list,
+        bigquery_datasets_get,
+        bigquery_datasets_insert,
+        bigquery_tables_list,
+        bigquery_tables_get,
+        bigquery_tables_insert,
+    ],
+)