diff --git a/scripts/validation/find-clients-with-customizations.js b/scripts/validation/find-clients-with-customizations.js
new file mode 100644
index 000000000000..70ef1164b269
--- /dev/null
+++ b/scripts/validation/find-clients-with-customizations.js
@@ -0,0 +1,115 @@
+/**
+ *
+ * This script generates an ignore pattern for clients that don't have any unique
+ * customizations.
+ *
+ */
+
+const path = require("path");
+const fs = require("fs");
+
+const clients = fs.readdirSync(path.join(__dirname, "..", "..", "clients"));
+
+const keep = [
+  "api-gateway",
+  "apigatewayv2",
+  "cloudfront-keyvaluestore",
+  "cognito-identity",
+  "dynamodb",
+  "ec2",
+  "glacier",
+  "iam",
+  "kinesis",
+  "kms",
+  "lambda",
+  "machine-learning",
+  "rds",
+  "route-53",
+  "s3",
+  "s3-control",
+  "sagemaker",
+  "sqs",
+  "sts",
+  "transcribe-streaming",
+];
+
+const commonPackages = {
+  "@aws-crypto/sha256-browser": "",
+  "@aws-crypto/sha256-js": "",
+  "@aws-sdk/client-sso-oidc": "",
+  "@aws-sdk/client-sts": "",
+  "@aws-sdk/core": "",
+  "@aws-sdk/credential-provider-node": "",
+  "@aws-sdk/middleware-host-header": "",
+  "@aws-sdk/middleware-logger": "",
+  "@aws-sdk/middleware-recursion-detection": "",
+  "@aws-sdk/middleware-user-agent": "",
+  "@aws-sdk/region-config-resolver": "",
+  "@aws-sdk/types": "",
+  "@aws-sdk/util-endpoints": "",
+  "@aws-sdk/util-user-agent-browser": "",
+  "@aws-sdk/util-user-agent-node": "",
+  "@smithy/config-resolver": "",
+  "@smithy/core": "",
+  "@smithy/fetch-http-handler": "",
+  "@smithy/hash-node": "",
+  "@smithy/invalid-dependency": "",
+  "@smithy/middleware-content-length": "",
+  "@smithy/middleware-endpoint": "",
+  "@smithy/middleware-retry": "",
+  "@smithy/middleware-serde": "",
+  "@smithy/middleware-stack": "",
+  "@smithy/node-config-provider": "",
+  "@smithy/node-http-handler": "",
+  "@smithy/protocol-http": "",
+  "@smithy/smithy-client": "",
+  "@smithy/types": "",
+  "@smithy/url-parser": "",
+  "@smithy/util-base64": "",
+  "@smithy/util-body-length-browser": "",
+  "@smithy/util-body-length-node": "",
+  "@smithy/util-defaults-mode-browser": "",
+  "@smithy/util-defaults-mode-node": "",
+  "@smithy/util-endpoints": "",
+  "@smithy/util-middleware": "",
+  "@smithy/util-retry": "",
+  "@smithy/util-utf8": "",
+  "@types/uuid": "",
+  tslib: "",
+  uuid: "",
+  "@smithy/util-waiter": "",
+  "@smithy/util-stream": "",
+  "@aws-sdk/xml-builder": "",
+  "@smithy/eventstream-serde-browser": "",
+  "@smithy/eventstream-serde-config-resolver": "",
+  "@smithy/eventstream-serde-node": "",
+};
+
+let ignore = [];
+
+for (const client of clients) {
+  const pkgJson = require(path.join(__dirname, "..", "..", "clients", client, "package.json"));
+  const shortName = pkgJson.name.split("@aws-sdk/client-")[1];
+
+  let interesting = false;
+
+  for (const dep in pkgJson.dependencies) {
+    if (!(dep in commonPackages)) {
+      interesting = true;
+    }
+  }
+
+  if (pkgJson.scripts.test || pkgJson.scripts["test:integration"] || pkgJson.scripts["test:e2e"]) {
+    interesting = true;
+  }
+
+  if (interesting && !keep.includes(shortName)) {
+    keep.push(shortName);
+  } else if (!keep.includes(shortName)) {
+    ignore.push(shortName);
+  }
+}
+
+console.log("keep:", keep);
+console.log("ignore:");
+console.log(`**/client-{${ignore.join(",")}}`);