diff --git a/libs/inngest/src/client.ts b/libs/inngest/src/client.ts
index 8f9a3d8..c82489c 100644
--- a/libs/inngest/src/client.ts
+++ b/libs/inngest/src/client.ts
@@ -6,6 +6,7 @@ import { schema as googleSchema } from './integrations/google/index.js';
 import { schema as sanitySchema } from './integrations/sanity/index.js';
 import { schema as stripeSchema } from './integrations/stripe/index.js';
 import { schema as websiteSchema } from './integrations/website/index.js';
+import { schema as kitSchema } from './integrations/kit/index.js';
 
 // TODO pin Zod to 3 or figure out other workaround for
 // https://github.com/inngest/inngest-js/issues/1014
@@ -16,7 +17,8 @@ export const schemas = new EventSchemas()
 	.fromZod(googleSchema)
 	.fromZod(sanitySchema)
 	.fromZod(stripeSchema)
-	.fromZod(websiteSchema);
+	.fromZod(websiteSchema)
+	.fromZod(kitSchema);
 
 if (!process.env.INNGEST_EVENT_KEY) {
 	console.error('missing INNGEST_EVENT_KEY. Workflows will not run.');
diff --git a/libs/inngest/src/index.ts b/libs/inngest/src/index.ts
index 54f6059..0d4510c 100644
--- a/libs/inngest/src/index.ts
+++ b/libs/inngest/src/index.ts
@@ -43,6 +43,7 @@ import {
 	handleUpdateUserProfile,
 	handleWDCIntakeSubmit,
 } from './integrations/website/steps.js';
+import { tagSubscriber } from './integrations/kit/steps.js';
 
 export { inngest } from './client.js';
 
@@ -94,4 +95,5 @@ export const functions: any[] = [
 	handleLWJIntake,
 	handleUpdateUserProfile,
 	handleWDCIntakeSubmit,
+	tagSubscriber,
 ];
diff --git a/libs/inngest/src/integrations/kit/index.ts b/libs/inngest/src/integrations/kit/index.ts
new file mode 100644
index 0000000..4132733
--- /dev/null
+++ b/libs/inngest/src/integrations/kit/index.ts
@@ -0,0 +1 @@
+export { schema } from './types.js';
diff --git a/libs/inngest/src/integrations/kit/steps.ts b/libs/inngest/src/integrations/kit/steps.ts
new file mode 100644
index 0000000..45692b5
--- /dev/null
+++ b/libs/inngest/src/integrations/kit/steps.ts
@@ -0,0 +1,18 @@
+import { inngest } from '../../client.js';
+import { tagSubscriber as tagSubscriberKit } from '@codetv/kit';
+
+export const tagSubscriber = inngest.createFunction(
+	{ id: 'kit/subscriber.tag.add' },
+	{ event: 'kit/subscriber.tag.add' },
+	async function ({
+		event,
+		step,
+	}: {
+		event: any;
+		step: any;
+	}): Promise<{ subscription: any }> {
+		return await step.run('tag-subscriber', async () => {
+			return await tagSubscriberKit(event.data.email, event.data.tagName);
+		});
+	},
+);
diff --git a/libs/inngest/src/integrations/kit/types.ts b/libs/inngest/src/integrations/kit/types.ts
new file mode 100644
index 0000000..ccec006
--- /dev/null
+++ b/libs/inngest/src/integrations/kit/types.ts
@@ -0,0 +1,10 @@
+import { z } from 'zod';
+
+export const schema = {
+	'kit/subscriber.tag.add': {
+		data: z.object({
+			email: z.string(),
+			tag: z.string(),
+		}),
+	},
+};
\ No newline at end of file
diff --git a/libs/inngest/src/integrations/sanity/steps.ts b/libs/inngest/src/integrations/sanity/steps.ts
index d8d4649..b9c1531 100644
--- a/libs/inngest/src/integrations/sanity/steps.ts
+++ b/libs/inngest/src/integrations/sanity/steps.ts
@@ -15,7 +15,7 @@ import { inngest } from '../../client.js';
 export const getCurrentActiveHackathon = inngest.createFunction(
 	{ id: 'sanity/hackathon.get-current-active' },
 	{ event: 'sanity/hackathon.get-current-active' },
-	async function ({ event }): Promise<{ _id: string } | null> {
+	async function ({ event }): Promise<{ _id: string; slug: string } | null> {
 		return await getActiveHackathon();
 	},
 );
diff --git a/libs/inngest/src/integrations/website/steps.ts b/libs/inngest/src/integrations/website/steps.ts
index 85f506c..8fd7940 100644
--- a/libs/inngest/src/integrations/website/steps.ts
+++ b/libs/inngest/src/integrations/website/steps.ts
@@ -21,6 +21,7 @@ import {
 	updateUserRole,
 } from '../discord/steps.ts';
 import { userGetById } from '../clerk/steps.ts';
+import { tagSubscriber } from '../kit/steps.ts';
 
 export const handleUpdateUserProfile = inngest.createFunction(
 	{ id: 'codetv/user.profile.update' },
@@ -246,6 +247,14 @@ export const handleHackathonSubmission = inngest.createFunction(
 					optOutSponsorship: event.data.optOutSponsorship,
 				},
 			}),
+			// Tag subscriber in Kit
+			step.invoke('tag-subscriber', {
+				function: tagSubscriber,
+				data: {
+					email: event.data.email,
+					tagName: `wdc-hackathon-${hackathon?.slug}`,
+				},
+			}),
 		]);
 
 		return submission;
diff --git a/libs/kit/src/index.ts b/libs/kit/src/index.ts
index 90c557b..6e44a25 100644
--- a/libs/kit/src/index.ts
+++ b/libs/kit/src/index.ts
@@ -1,25 +1,29 @@
 const ck_api = new URL('https://api.convertkit.com');
 const api_key = process.env.KIT_SECRET_KEY;
 
-if (api_key) {
-	ck_api.searchParams.set('api_secret', api_key);
-} else {
+if (!api_key) {
 	console.error(
 		'KIT_SECRET_KEY is not set in env. Newsletter activities will not work.',
 	);
 }
 
+function createApiUrl(pathname: string) {
+	const url = new URL(pathname, CK_BASE_URL);
+	url.searchParams.set('api_secret', api_key!);
+	return url;
+}
+
 export async function addSubscriber(first_name: string, email: string) {
 	/** @see https://app.convertkit.com/forms/designers/1269192/edit */
-	ck_api.pathname = '/v3/forms/1269192/subscribe';
+	const url = createApiUrl('/v3/forms/1269192/subscribe');
 
-	const response = await fetch(ck_api, {
+	const response = await fetch(url, {
 		method: 'POST',
 		headers: {
 			'Content-Type': 'application/json; charset=utf-8',
 		},
 		body: JSON.stringify({
-			api_key,
+			api_secret: api_key,
 			first_name,
 			email,
 		}),
@@ -44,10 +48,10 @@ export async function addSubscriber(first_name: string, email: string) {
 }
 
 export async function getSubscriberByEmail(email: string) {
-	ck_api.pathname = '/v3/subscribers';
-	ck_api.searchParams.set('email_address', email);
+	const url = createApiUrl('/v3/subscribers');
+	url.searchParams.set('email_address', email);
 
-	const res = await fetch(ck_api);
+	const res = await fetch(url);
 
 	if (!res.ok) {
 		console.error(res.statusText);
@@ -59,3 +63,56 @@ export async function getSubscriberByEmail(email: string) {
 
 	return data.subscribers.at(0);
 }
+
+export async function getTags() {
+	const url = createApiUrl('/v3/tags');
+
+	const res = await fetch(url);
+
+	if (!res.ok) {
+		console.error(res.statusText);
+		throw new Error('Error fetching tags');
+	}
+
+	const data = (await res.json()) as any;
+
+	return data.tags as Array<{ id: number; name: string }>;
+}
+
+export async function tagSubscriber(email: string, tagName: string) {
+	if (!tagName) {
+		throw new Error('tagName is required to tag a subscriber');
+	}
+
+	// Look up the tag ID by name
+	const tags = await getTags();
+	const tag = tags.find((t) => t.name?.toLowerCase() === tagName.toLowerCase());
+
+	if (!tag) {
+		throw new Error(`Tag "${tagName}" not found in Kit`);
+	}
+
+	const url = createApiUrl(`/v3/tags/${tag.id}/subscribe`);
+
+	const res = await fetch(url, {
+		method: 'POST',
+		headers: {
+			'Content-Type': 'application/json; charset=utf-8',
+		},
+		body: JSON.stringify({
+			api_secret: api_key,
+			email,
+		}),
+	});
+
+	if (!res.ok) {
+		const errorText = await res.text();
+		console.error(`Error tagging subscriber: ${res.status} ${res.statusText}`);
+		console.error(errorText);
+		throw new Error(`Error tagging subscriber: ${res.statusText}`);
+	}
+
+	const data = (await res.json()) as any;
+
+	return data.subscription;
+}
\ No newline at end of file
diff --git a/libs/kit/tsconfig.lib.json b/libs/kit/tsconfig.lib.json
index 911ba65..83847af 100644
--- a/libs/kit/tsconfig.lib.json
+++ b/libs/kit/tsconfig.lib.json
@@ -1,6 +1,7 @@
 {
   "extends": "../../tsconfig.base.json",
   "compilerOptions": {
+    "allowImportingTsExtensions": true,
     "baseUrl": ".",
     "rootDir": "src",
     "outDir": "dist",
diff --git a/libs/sanity/src/index.ts b/libs/sanity/src/index.ts
index 20808f3..b804d42 100644
--- a/libs/sanity/src/index.ts
+++ b/libs/sanity/src/index.ts
@@ -619,7 +619,8 @@ const hackathonBySlugQuery = groq`
 
 const activeHackathonQuery = groq`
   *[_type == "hackathon" && hidden != "hidden" && dateTime(pubDate) <= dateTime(now()) && dateTime(deadline) > dateTime(now())] | order(pubDate desc)[0] {
-    _id
+    _id,
+    'slug': slug.current,
   }
 `;
 
@@ -813,11 +814,10 @@ export async function getHackathonBySlug(params: { slug: string }) {
 }
 
 export async function getActiveHackathon() {
-	const hackathon = await client.fetch<{ _id: string } | null>(
-		activeHackathonQuery,
-		{},
-		{ useCdn: true },
-	);
+	const hackathon = await client.fetch<{
+		_id: string;
+		slug: string;
+	} | null>(activeHackathonQuery, {}, { useCdn: true });
 
 	if (!hackathon) {
 		return null;