diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index e55ae53ac8..1bd52cea0e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -77,6 +77,10 @@ jobs:
         if: always()
         run: pnpm run lint
         working-directory: packages/realm-server
+      - name: Lint Runtime Common
+        if: always()
+        run: pnpm run lint
+        working-directory: packages/runtime-common
 
   ai-bot-test:
     name: AI bot Tests
diff --git a/packages/runtime-common/create-response.ts b/packages/runtime-common/create-response.ts
index d42cb69c5e..1fac00e691 100644
--- a/packages/runtime-common/create-response.ts
+++ b/packages/runtime-common/create-response.ts
@@ -11,9 +11,12 @@ export function createResponse(
     headers: {
       ...init?.headers,
       'X-Boxel-Realm-Url': realm.url,
-      ...(realm.isPublicReadable && { 'X-Boxel-Realm-Public-Readable': 'true' }),
+      ...(realm.isPublicReadable && {
+        'X-Boxel-Realm-Public-Readable': 'true',
+      }),
       vary: 'Accept',
-      'Access-Control-Expose-Headers': 'X-Boxel-Realm-Url,X-Boxel-Realm-Public-Readable,Authorization',
+      'Access-Control-Expose-Headers':
+        'X-Boxel-Realm-Url,X-Boxel-Realm-Public-Readable,Authorization',
       ...(relaxDocumentDomain
         ? {
             // we use this header to permit cross origin communication to
diff --git a/packages/runtime-common/error.ts b/packages/runtime-common/error.ts
index b49365f769..637280ed22 100644
--- a/packages/runtime-common/error.ts
+++ b/packages/runtime-common/error.ts
@@ -139,10 +139,7 @@ export function serializableError(err: any): any {
   return result;
 }
 
-export function responseWithError(
-  realm: Realm,
-  error: CardError,
-): Response {
+export function responseWithError(realm: Realm, error: CardError): Response {
   return createResponse(
     realm,
     JSON.stringify({ errors: [serializableError(error)] }),
@@ -154,10 +151,7 @@ export function responseWithError(
   );
 }
 
-export function methodNotAllowed(
-  realm: Realm,
-  request: Request,
-): Response {
+export function methodNotAllowed(realm: Realm, request: Request): Response {
   return responseWithError(
     realm,
     new CardError(`${request.method} not allowed for ${request.url}`, {
@@ -171,30 +165,15 @@ export function notFound(
   request: Request,
   message = `Could not find ${request.url}`,
 ): Response {
-  return responseWithError(
-    realm,
-    new CardError(message, { status: 404 }),
-  );
+  return responseWithError(realm, new CardError(message, { status: 404 }));
 }
 
-export function badRequest(
-  realm: Realm,
-  message: string,
-): Response {
-  return responseWithError(
-    realm,
-    new CardError(message, { status: 400 }),
-  );
+export function badRequest(realm: Realm, message: string): Response {
+  return responseWithError(realm, new CardError(message, { status: 400 }));
 }
 
-export function systemUnavailable(
-  realm: Realm,
-  message: string,
-): Response {
-  return responseWithError(
-    realm,
-    new CardError(message, { status: 503 }),
-  );
+export function systemUnavailable(realm: Realm, message: string): Response {
+  return responseWithError(realm, new CardError(message, { status: 503 }));
 }
 
 export function systemError(
diff --git a/packages/runtime-common/etc/test-fixtures.ts b/packages/runtime-common/etc/test-fixtures.ts
index b6d549f246..a2140617bb 100644
--- a/packages/runtime-common/etc/test-fixtures.ts
+++ b/packages/runtime-common/etc/test-fixtures.ts
@@ -1,3 +1,4 @@
+/* eslint-disable no-useless-escape */
 export const cardSrc = `
 import {
   contains,
diff --git a/packages/runtime-common/helpers/ai.ts b/packages/runtime-common/helpers/ai.ts
index 7cf030fb40..5d97665077 100644
--- a/packages/runtime-common/helpers/ai.ts
+++ b/packages/runtime-common/helpers/ai.ts
@@ -155,7 +155,7 @@ function generatePatchCallSpecification(
     properties: {},
   };
 
-  const { id: removedIdField, ...fields } = cardApi.getFields(def, {
+  const { id: _removedIdField, ...fields } = cardApi.getFields(def, {
     usedFieldsOnly: false,
   });
 
diff --git a/packages/runtime-common/matrix-client.ts b/packages/runtime-common/matrix-client.ts
index bd470e0715..dd83966f80 100644
--- a/packages/runtime-common/matrix-client.ts
+++ b/packages/runtime-common/matrix-client.ts
@@ -148,7 +148,9 @@ export class MatrixClient {
     return json as T;
   }
 
-  async getProfile(userId: string): Promise<{ displayname: string } | undefined> {
+  async getProfile(
+    userId: string,
+  ): Promise<{ displayname: string } | undefined> {
     let response = await this.request(
       `_matrix/client/v3/profile/${userId}`,
       'GET',
diff --git a/packages/runtime-common/package.json b/packages/runtime-common/package.json
index 93a7dc93d0..3ff4e96fda 100644
--- a/packages/runtime-common/package.json
+++ b/packages/runtime-common/package.json
@@ -63,5 +63,9 @@
   "peerDependencies": {
     "@babel/core": "^7.24.3",
     "ember-cli-htmlbars": "^6.3.0"
+  },
+  "scripts": {
+    "lint": "eslint . --cache --ext ts",
+    "lint:js:fix": "eslint . --fix"
   }
 }
diff --git a/packages/runtime-common/realm-permission-checker.ts b/packages/runtime-common/realm-permission-checker.ts
index 9bbd8deaf9..720d3ac826 100644
--- a/packages/runtime-common/realm-permission-checker.ts
+++ b/packages/runtime-common/realm-permission-checker.ts
@@ -13,17 +13,21 @@ export default class RealmPermissionChecker {
   async for(username: string) {
     let doesMatrixUserProfileExist = false;
     if (this.realmPermissions['users']) {
-      doesMatrixUserProfileExist = !!(await this.matrixClient.getProfile(username));
+      doesMatrixUserProfileExist = !!(await this.matrixClient.getProfile(
+        username,
+      ));
     }
     return Array.from(
       new Set([
-        ...(doesMatrixUserProfileExist ? this.realmPermissions['users'] || [] : []),
+        ...(doesMatrixUserProfileExist
+          ? this.realmPermissions['users'] || []
+          : []),
         ...(this.realmPermissions['*'] || []),
         ...(this.realmPermissions[username] || []),
-     ]));
+      ]),
+    );
   }
 
-
   async can(username: string, action: 'read' | 'write') {
     let userPermissions = await this.for(username);
     return userPermissions.includes(action);
diff --git a/packages/runtime-common/realm.ts b/packages/runtime-common/realm.ts
index d85f3f33d4..0a66d33044 100644
--- a/packages/runtime-common/realm.ts
+++ b/packages/runtime-common/realm.ts
@@ -747,7 +747,10 @@ export class Realm {
     hash.update(this.#realmSecretSeed);
     let hashedResponse = uint8ArrayToHex(await hash.digest());
     if (hashedResponse === challenge) {
-      let permissions = await (new RealmPermissionChecker(this.#permissions, this.#matrixClient)).for(user);
+      let permissions = await new RealmPermissionChecker(
+        this.#permissions,
+        this.#matrixClient,
+      ).for(user);
       let jwt = this.#adapter.createJWT(
         {
           user,
@@ -968,30 +971,24 @@ export class Realm {
     request: Request,
     neededPermission: 'read' | 'write',
   ) {
-      let endpontsWithoutAuthNeeded: RouteTable<true> = new Map([
-        // authentication endpoint
-        [
-          SupportedMimeType.Session,
-          new Map([
-            ['POST' as Method, new Map([['/_session', true]])],
-          ]),
-        ],
-        // SSE endpoint
-        [
-          SupportedMimeType.EventStream,
-          new Map([
-            ['GET' as Method, new Map([['/_message', true]])],
-          ]),
-        ],
-        // serve a text/html endpoint
-        [
-          SupportedMimeType.HTML,
-          new Map([
-            ['GET' as Method, new Map([['/.*', true]])],
-          ]),
-        ],
-      ]);
-    
+    let endpontsWithoutAuthNeeded: RouteTable<true> = new Map([
+      // authentication endpoint
+      [
+        SupportedMimeType.Session,
+        new Map([['POST' as Method, new Map([['/_session', true]])]]),
+      ],
+      // SSE endpoint
+      [
+        SupportedMimeType.EventStream,
+        new Map([['GET' as Method, new Map([['/_message', true]])]]),
+      ],
+      // serve a text/html endpoint
+      [
+        SupportedMimeType.HTML,
+        new Map([['GET' as Method, new Map([['/.*', true]])]]),
+      ],
+    ]);
+
     if (
       lookupRouteTable(endpontsWithoutAuthNeeded, this.paths, request) ||
       request.method === 'HEAD' ||
@@ -1016,11 +1013,14 @@ export class Realm {
       token = this.#adapter.verifyJWT(tokenString, this.#realmSecretSeed);
       let realmPermissionChecker = new RealmPermissionChecker(
         this.#permissions,
-        this.#matrixClient
+        this.#matrixClient,
       );
-      
+
       let permissions = await realmPermissionChecker.for(token.user);
-      if (JSON.stringify(token.permissions.sort()) !== JSON.stringify(permissions.sort())) {
+      if (
+        JSON.stringify(token.permissions.sort()) !==
+        JSON.stringify(permissions.sort())
+      ) {
         throw new AuthenticationError(
           'User permissions have been updated. Please refresh the token',
         );
diff --git a/packages/runtime-common/router.ts b/packages/runtime-common/router.ts
index 76218f3ef3..13a9feee14 100644
--- a/packages/runtime-common/router.ts
+++ b/packages/runtime-common/router.ts
@@ -43,10 +43,14 @@ export function extractSupportedMimeType(
 
 export type RouteTable<T> = Map<SupportedMimeType, Map<Method, Map<string, T>>>;
 
-export function lookupRouteTable<T>(routeTable: RouteTable<T>, paths: RealmPaths, request: Request) {
+export function lookupRouteTable<T>(
+  routeTable: RouteTable<T>,
+  paths: RealmPaths,
+  request: Request,
+) {
   let acceptMimeType = extractSupportedMimeType(
     request.headers.get('Accept') as unknown as null | string | [string],
-  )
+  );
   if (!acceptMimeType) {
     return;
   }
@@ -77,7 +81,10 @@ export function lookupRouteTable<T>(routeTable: RouteTable<T>, paths: RealmPaths
 }
 
 export class Router {
-  #routeTable: RouteTable<Handler> = new Map<SupportedMimeType, Map<Method, Map<string, Handler>>>();
+  #routeTable: RouteTable<Handler> = new Map<
+    SupportedMimeType,
+    Map<Method, Map<string, Handler>>
+  >();
   log = logger('realm:router');
   #paths: RealmPaths;
   constructor(mountURL: URL) {