diff --git a/packages/client/README.md b/packages/client/README.md
index 5b34532..5fc6735 100644
--- a/packages/client/README.md
+++ b/packages/client/README.md
@@ -10,7 +10,7 @@
 
 ## ⚠️ tsky is still in development and is not ready for production use
 
-tsky is still in active development and is not ready for production use. If you want to contribute to the project, please read the [CONTRIBUTING.md](CONTRIBUTING.md) file or join our [Discord Server](https://discord.gg/KPD7XPUZn3).
+tsky is still in active development and is not ready for production use. If you want to contribute to the project, please read the [CONTRIBUTING.md](../../CONTRIBUTING.md) file or join our [Discord Server](https://discord.gg/KPD7XPUZn3).
 
 tsky is a lightweight, fast, universal and typed Bluesky API wrapper for Apps & Bots. It's designed to be easy to use, lightweight and straightforward to use. It's built with TypeScript and has full type support.
 
@@ -77,7 +77,7 @@ const user_profile = await agent.user.profile();
 
 ## Contributing
 
-If you want to contribute to this project, please read the [CONTRIBUTING.md](CONTRIBUTING.md) file.
+If you want to contribute to this project, please read the [CONTRIBUTING.md](../../CONTRIBUTING.md) file.
 
 ## License
 
diff --git a/packages/lex-cli/src/generator/schema.ts b/packages/lex-cli/src/generator/schema.ts
index 0f10988..abc7231 100644
--- a/packages/lex-cli/src/generator/schema.ts
+++ b/packages/lex-cli/src/generator/schema.ts
@@ -368,9 +368,25 @@ export const userTypeSchema = t.isOneOf([
 
 export type UserTypeSchema = t.InferType<typeof userTypeSchema>;
 
+/**
+ * represents a namespace identifier (NSID)
+ */
+export type Nsid = `${string}.${string}.${string}`;
+
 const NSID_RE =
-  /^[a-z](?:[a-z0-9-]{0,61}[a-z0-9])?(?:\.[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?)+\.[a-z]{1,63}$/i;
-const nsidType = t.cascade(t.isString(), (value) => NSID_RE.test(value));
+  /^[a-zA-Z](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+\.[a-zA-Z][a-zA-Z0-9]{0,62}?$/;
+
+// #__NO_SIDE_EFFECTS__
+export const isNsid = (input: unknown): input is Nsid => {
+  return (
+    typeof input === 'string' &&
+    input.length >= 5 &&
+    input.length <= 317 &&
+    NSID_RE.test(input)
+  );
+};
+
+const nsidType = t.cascade(t.isString(), (value) => isNsid(value));
 
 export const documentSchema = t.cascade(
   t.isObject({