diff --git a/.gitignore b/.gitignore
index 9f449ce4a..06827b584 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,5 @@ dist/
 .idea
 .coverage
 sponge_log.xml
+.envrc
+*.iml
diff --git a/build.sh b/build.sh
new file mode 100755
index 000000000..fc85edff9
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,168 @@
+#!/usr/bin/env 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
+#
+#      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.
+
+# Set SCRIPT_DIR to the current directory of this file.
+SCRIPT_DIR=$(cd -P "$(dirname "$0")" >/dev/null 2>&1 && pwd)
+SCRIPT_FILE="${SCRIPT_DIR}/$(basename "$0")"
+
+##
+## Local Development
+##
+## These functions should be used to run the local development process
+##
+
+if [[ ! -d venv ]] ; then
+  echo "./venv not found. Setting up venv"
+  python3 -m venv "$PWD/venv"
+fi
+source "$PWD/venv/bin/activate"
+
+if which pip3 ; then
+  PIP_CMD=pip3
+elif which pip ; then
+  PIP_CMD=pip
+else
+  echo "pip not found. Please add pip to your path."
+  exit 1
+fi
+if ! which nox ; then
+  $PIP_CMD install nox
+fi
+
+
+
+## clean - Cleans the build output
+function clean() {
+  if [[ -d '.tools' ]] ; then
+    rm -rf .tools
+  fi
+}
+
+## build - Builds the project without running tests.
+function build() {
+  nox --sessions build
+}
+
+## test - Runs local unit tests.
+function test() {
+  nox --sessions unit --python=3.13
+}
+
+## e2e - Runs end-to-end integration tests.
+function e2e() {
+  if [[ ! -f .envrc ]] ; then
+    write_e2e_env .envrc
+  fi
+  source .envrc
+  nox --sessions system  --python=3.13
+}
+
+## fix - Fixes code format.
+function fix() {
+  nox --sessions format
+}
+
+## lint - runs the linters
+function lint() {
+  # Check the commit includes a go.mod that is fully
+  # up to date.
+  nox --sessions lint
+}
+
+## deps - updates project dependencies to latest
+function deps() {
+  echo "Todo: deps"
+  exit 1
+}
+
+# write_e2e_env - Loads secrets from the gcloud project and writes
+#     them to target/e2e.env to run e2e tests.
+function write_e2e_env(){
+  # All secrets used by the e2e tests in the form <env_name>=<secret_name>
+  secret_vars=(
+    MYSQL_CONNECTION_NAME=MYSQL_CONNECTION_NAME
+    MYSQL_USER=MYSQL_USER
+    MYSQL_USER_IAM=MYSQL_USER_IAM_GO
+    MYSQL_PASS=MYSQL_PASS
+    MYSQL_DB=MYSQL_DB
+    MYSQL_MCP_CONNECTION_NAME=MYSQL_MCP_CONNECTION_NAME
+    MYSQL_MCP_PASS=MYSQL_MCP_PASS
+    POSTGRES_CONNECTION_NAME=POSTGRES_CONNECTION_NAME
+    POSTGRES_USER=POSTGRES_USER
+    POSTGRES_USER_IAM=POSTGRES_USER_IAM_GO
+    POSTGRES_PASS=POSTGRES_PASS
+    POSTGRES_DB=POSTGRES_DB
+    POSTGRES_CAS_CONNECTION_NAME=POSTGRES_CAS_CONNECTION_NAME
+    POSTGRES_CAS_PASS=POSTGRES_CAS_PASS
+    POSTGRES_CUSTOMER_CAS_CONNECTION_NAME=POSTGRES_CUSTOMER_CAS_CONNECTION_NAME
+    POSTGRES_CUSTOMER_CAS_PASS=POSTGRES_CUSTOMER_CAS_PASS
+    POSTGRES_CUSTOMER_CAS_DOMAIN_NAME=POSTGRES_CUSTOMER_CAS_DOMAIN_NAME
+    POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME=POSTGRES_CUSTOMER_CAS_INVALID_DOMAIN_NAME
+    POSTGRES_MCP_CONNECTION_NAME=POSTGRES_MCP_CONNECTION_NAME
+    POSTGRES_MCP_PASS=POSTGRES_MCP_PASS
+    SQLSERVER_CONNECTION_NAME=SQLSERVER_CONNECTION_NAME
+    SQLSERVER_USER=SQLSERVER_USER
+    SQLSERVER_PASS=SQLSERVER_PASS
+    SQLSERVER_DB=SQLSERVER_DB
+    QUOTA_PROJECT=QUOTA_PROJECT
+  )
+
+  if [[ -z "$TEST_PROJECT" ]] ; then
+    echo "Set TEST_PROJECT environment variable to the project containing"
+    echo "the e2e test suite secrets."
+    exit 1
+  fi
+
+  echo "Getting test secrets from $TEST_PROJECT into $1"
+  {
+  for env_name in "${secret_vars[@]}" ; do
+    env_var_name="${env_name%%=*}"
+    secret_name="${env_name##*=}"
+    set -x
+    val=$(gcloud secrets versions access latest --project "$TEST_PROJECT" --secret="$secret_name")
+    echo "export $env_var_name='$val'"
+  done
+  } > "$1"
+
+}
+
+## help - prints the help details
+##
+function help() {
+   # This will print the comments beginning with ## above each function
+   # in this file.
+
+   echo "build.sh <command> <arguments>"
+   echo
+   echo "Commands to assist with local development and CI builds."
+   echo
+   echo "Commands:"
+   echo
+   grep -e '^##' "$SCRIPT_FILE" | sed -e 's/##/ /'
+}
+
+set -euo pipefail
+
+# Check CLI Arguments
+if [[ "$#" -lt 1 ]] ; then
+  help
+  exit 1
+fi
+
+cd "$SCRIPT_DIR"
+
+"$@"
+
diff --git a/google/cloud/sql/connector/client.py b/google/cloud/sql/connector/client.py
index 2e1fbc20d..11508ce17 100644
--- a/google/cloud/sql/connector/client.py
+++ b/google/cloud/sql/connector/client.py
@@ -22,9 +22,9 @@
 import aiohttp
 from cryptography.hazmat.backends import default_backend
 from cryptography.x509 import load_pem_x509_certificate
-
 from google.auth.credentials import TokenState
 from google.auth.transport import requests
+
 from google.cloud.sql.connector.connection_info import ConnectionInfo
 from google.cloud.sql.connector.connection_name import ConnectionName
 from google.cloud.sql.connector.exceptions import AutoIAMAuthNotSupported
diff --git a/google/cloud/sql/connector/connector.py b/google/cloud/sql/connector/connector.py
index 05eaa51df..c76092a40 100755
--- a/google/cloud/sql/connector/connector.py
+++ b/google/cloud/sql/connector/connector.py
@@ -28,6 +28,7 @@
 import google.auth
 from google.auth.credentials import Credentials
 from google.auth.credentials import with_scopes_if_required
+
 import google.cloud.sql.connector.asyncpg as asyncpg
 from google.cloud.sql.connector.client import CloudSQLClient
 from google.cloud.sql.connector.enums import DriverMapping
diff --git a/google/cloud/sql/connector/refresh_utils.py b/google/cloud/sql/connector/refresh_utils.py
index 0ef7fcbf7..898f0f7a9 100644
--- a/google/cloud/sql/connector/refresh_utils.py
+++ b/google/cloud/sql/connector/refresh_utils.py
@@ -24,7 +24,6 @@
 from typing import Any, Callable
 
 import aiohttp
-
 from google.auth.credentials import Credentials
 from google.auth.credentials import Scoped
 import google.auth.transport.requests
diff --git a/noxfile.py b/noxfile.py
index f04756241..b0220f474 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -69,6 +69,15 @@ def format(session):
         *LINT_PATHS,
     )
 
+@nox.session()
+def build(session):
+    """
+    Just run the default tools to install requirements.
+    """
+    # Install all test dependencies, then install this package in-place.
+    session.install("-r", "requirements-test.txt")
+    session.install("-e", ".")
+    session.install("-r", "requirements.txt")
 
 def default(session, path):
     # Install all test dependencies, then install this package in-place.
diff --git a/tests/unit/mocks.py b/tests/unit/mocks.py
index 28c2fc307..66bf64a32 100644
--- a/tests/unit/mocks.py
+++ b/tests/unit/mocks.py
@@ -31,10 +31,10 @@
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import rsa
 from cryptography.x509.oid import NameOID
-
 from google.auth import _helpers
 from google.auth.credentials import Credentials
 from google.auth.credentials import TokenState
+
 from google.cloud.sql.connector.connector import _DEFAULT_UNIVERSE_DOMAIN
 from google.cloud.sql.connector.utils import generate_keys
 from google.cloud.sql.connector.utils import write_to_file
diff --git a/tests/unit/test_client.py b/tests/unit/test_client.py
index 2ecefe220..cfe509470 100644
--- a/tests/unit/test_client.py
+++ b/tests/unit/test_client.py
@@ -17,10 +17,10 @@
 
 from aiohttp import ClientResponseError
 from aioresponses import aioresponses
+from google.auth.credentials import Credentials
 from mocks import FakeCredentials
 import pytest
 
-from google.auth.credentials import Credentials
 from google.cloud.sql.connector.client import CloudSQLClient
 from google.cloud.sql.connector.utils import generate_keys
 from google.cloud.sql.connector.version import __version__ as version
diff --git a/tests/unit/test_connector.py b/tests/unit/test_connector.py
index 157697723..498c947cc 100644
--- a/tests/unit/test_connector.py
+++ b/tests/unit/test_connector.py
@@ -19,10 +19,10 @@
 from typing import Union
 
 from aiohttp import ClientResponseError
+from google.auth.credentials import Credentials
 from mock import patch
 import pytest  # noqa F401 Needed to run the tests
 
-from google.auth.credentials import Credentials
 from google.cloud.sql.connector import Connector
 from google.cloud.sql.connector import create_async_connector
 from google.cloud.sql.connector import IPTypes
diff --git a/tests/unit/test_refresh_utils.py b/tests/unit/test_refresh_utils.py
index 2d4cdb853..119e92c7a 100644
--- a/tests/unit/test_refresh_utils.py
+++ b/tests/unit/test_refresh_utils.py
@@ -20,19 +20,19 @@
 import datetime
 
 from conftest import SCOPES  # type: ignore
+import google.auth
+from google.auth.credentials import Credentials
+from google.auth.credentials import TokenState
+import google.oauth2.credentials
 from mock import Mock
 from mock import patch
 import pytest  # noqa F401 Needed to run the tests
 
-import google.auth
-from google.auth.credentials import Credentials
-from google.auth.credentials import TokenState
 from google.cloud.sql.connector.refresh_utils import _downscope_credentials
 from google.cloud.sql.connector.refresh_utils import _exponential_backoff
 from google.cloud.sql.connector.refresh_utils import _is_valid
 from google.cloud.sql.connector.refresh_utils import _seconds_until_refresh
 from google.cloud.sql.connector.refresh_utils import retry_50x
-import google.oauth2.credentials
 
 
 @pytest.fixture