diff --git a/.github/actions/ci-checks/action.yml b/.github/actions/ci-checks/action.yml
index 8973c57927..687649e336 100644
--- a/.github/actions/ci-checks/action.yml
+++ b/.github/actions/ci-checks/action.yml
@@ -17,3 +17,7 @@ runs:
     - name: Svelte Check
       run: yarn --cwd packages/xstate-svelte svelte-check
       shell: bash
+
+    - name: Knip
+      run: yarn knip
+      shell: bash
diff --git a/.knip.jsonc b/.knip.jsonc
index 69009ec21c..f2b5617355 100644
--- a/.knip.jsonc
+++ b/.knip.jsonc
@@ -5,6 +5,21 @@
       "entry": ["scripts/*.js"],
       "project": ["scripts/*.js"]
     },
+    "packages/core": {
+      "entry": [
+        "src/index.ts",
+        "src/actions.ts",
+        "src/actors/index.ts",
+        "src/guards.ts",
+        "src/dev/index.ts"
+      ]
+    },
+    "packages/xstate-inspect": {
+      "entry": ["src/index.ts", "src/server.ts"]
+    },
+    "packages/xstate-store": {
+      "entry": ["src/index.ts", "src/react.ts", "src/solid.ts"]
+    },
     "packages/xstate-svelte": {
       "typescript": "test/tsconfig.json"
     }
@@ -22,6 +37,7 @@
     "synckit",
     // package.json#exports aren't added as entry points, because `dist/` is .gitignored
     "react",
+    "solid-js",
     "xstate",
     "@types/ws"
   ]
diff --git a/packages/core/src/State.ts b/packages/core/src/State.ts
index 4fbfb557a2..c883a1ab2f 100644
--- a/packages/core/src/State.ts
+++ b/packages/core/src/State.ts
@@ -24,7 +24,7 @@ import type {
 } from './types.ts';
 import { matchesState } from './utils.ts';
 
-export type ToTestStateValue<TStateValue extends StateValue> =
+type ToTestStateValue<TStateValue extends StateValue> =
   TStateValue extends string
     ? TStateValue
     : IsNever<keyof TStateValue> extends true
diff --git a/packages/xstate-store/src/store.ts b/packages/xstate-store/src/store.ts
index 56bb7d83e0..198b409f78 100644
--- a/packages/xstate-store/src/store.ts
+++ b/packages/xstate-store/src/store.ts
@@ -343,6 +343,6 @@ export function createStoreTransition<
 }
 
 // create a unique 6-char id
-export function uniqueId() {
+function uniqueId() {
   return Math.random().toString(36).slice(6);
 }