diff --git a/.changeset/loud-rocks-sell.md b/.changeset/loud-rocks-sell.md
new file mode 100644
index 00000000..28fe78b2
--- /dev/null
+++ b/.changeset/loud-rocks-sell.md
@@ -0,0 +1,5 @@
+---
+'@tanstack/pacer': patch
+---
+
+Removed auto-uuid key generation for devtools. Now in order for pacer devtools to detect a util, you must define a key option
diff --git a/.cursorignore b/.cursorignore
new file mode 100644
index 00000000..faba0f68
--- /dev/null
+++ b/.cursorignore
@@ -0,0 +1 @@
+**/reference/**
\ No newline at end of file
diff --git a/docs/devtools.md b/docs/devtools.md
index c7ab01de..2d88cfee 100644
--- a/docs/devtools.md
+++ b/docs/devtools.md
@@ -89,11 +89,11 @@ import { pacerDevtoolsPlugin } from '@tanstack/react-pacer-devtools/production'
 
 ## Registering Utilities
 
-Each utility should automatically be detected and displayed in the devtools. However, if you don't provide a `key` option to the utility, it will show with a uuid for its name. Give it an identifiable name with the `key` option.
+Pacer utilities only register with the devtools when you pass a `key`. Keys are no longer generated automatically, so leave the option out if you do not want an instance to appear in the panels.
 
 ```tsx
 const debouncer = new Debouncer(myDebounceFn, {
-  key: 'My Debouncer', // friendly name for the utility instead of auto-generated uuid
+  key: 'My Debouncer', // friendly name shown in the devtools
   wait: 1000,
 })
 ```
\ No newline at end of file
diff --git a/docs/reference/classes/AsyncBatcher.md b/docs/reference/classes/AsyncBatcher.md
index e1deaf92..22cc6222 100644
--- a/docs/reference/classes/AsyncBatcher.md
+++ b/docs/reference/classes/AsyncBatcher.md
@@ -139,7 +139,7 @@ Defined in: [async-batcher.ts:278](https://github.com/TanStack/pacer/blob/main/p
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [async-batcher.ts:269](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L269)
@@ -166,29 +166,13 @@ Defined in: [async-batcher.ts:266](https://github.com/TanStack/pacer/blob/main/p
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [async-batcher.ts:299](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L299)
-
-Emits a change event for the async batcher instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### abort()
 
 ```ts
 abort(): void;
 ```
 
-Defined in: [async-batcher.ts:493](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L493)
+Defined in: [async-batcher.ts:488](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L488)
 
 Aborts all ongoing executions with the internal abort controllers.
 Does NOT cancel any pending execution that have not started yet.
@@ -206,7 +190,7 @@ Does NOT clear out the items.
 addItem(item): Promise<any>;
 ```
 
-Defined in: [async-batcher.ts:345](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L345)
+Defined in: [async-batcher.ts:340](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L340)
 
 Adds an item to the async batcher
 If the batch size is reached, timeout occurs, or shouldProcess returns true, the batch will be processed
@@ -235,7 +219,7 @@ The error from the batch function if no onError handler is configured or throwOn
 cancel(): void;
 ```
 
-Defined in: [async-batcher.ts:506](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L506)
+Defined in: [async-batcher.ts:501](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L501)
 
 Cancels any pending execution that have not started yet.
 Does NOT abort any execution already in progress.
@@ -253,7 +237,7 @@ Does NOT clear out the items.
 clear(): void;
 ```
 
-Defined in: [async-batcher.ts:454](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L454)
+Defined in: [async-batcher.ts:449](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L449)
 
 Removes all items from the async batcher
 
@@ -269,7 +253,7 @@ Removes all items from the async batcher
 flush(): Promise<any>;
 ```
 
-Defined in: [async-batcher.ts:428](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L428)
+Defined in: [async-batcher.ts:423](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L423)
 
 Processes the current batch of items immediately
 
@@ -285,7 +269,7 @@ Processes the current batch of items immediately
 getAbortSignal(executeCount?): AbortSignal | null;
 ```
 
-Defined in: [async-batcher.ts:482](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L482)
+Defined in: [async-batcher.ts:477](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L477)
 
 Returns the AbortSignal for a specific execution.
 If no executeCount is provided, returns the signal for the most recent execution.
@@ -330,7 +314,7 @@ const batcher = new AsyncBatcher(
 peekAllItems(): TValue[];
 ```
 
-Defined in: [async-batcher.ts:436](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L436)
+Defined in: [async-batcher.ts:431](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L431)
 
 Returns a copy of all items in the async batcher
 
@@ -346,7 +330,7 @@ Returns a copy of all items in the async batcher
 peekFailedItems(): TValue[];
 ```
 
-Defined in: [async-batcher.ts:440](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L440)
+Defined in: [async-batcher.ts:435](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L435)
 
 #### Returns
 
@@ -360,7 +344,7 @@ Defined in: [async-batcher.ts:440](https://github.com/TanStack/pacer/blob/main/p
 reset(): void;
 ```
 
-Defined in: [async-batcher.ts:516](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L516)
+Defined in: [async-batcher.ts:511](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L511)
 
 Resets the async batcher state to its default values
 
@@ -376,7 +360,7 @@ Resets the async batcher state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [async-batcher.ts:304](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L304)
+Defined in: [async-batcher.ts:299](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L299)
 
 Updates the async batcher options
 
diff --git a/docs/reference/classes/AsyncDebouncer.md b/docs/reference/classes/AsyncDebouncer.md
index 86114173..405aecb6 100644
--- a/docs/reference/classes/AsyncDebouncer.md
+++ b/docs/reference/classes/AsyncDebouncer.md
@@ -116,7 +116,7 @@ Defined in: [async-debouncer.ts:231](https://github.com/TanStack/pacer/blob/main
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [async-debouncer.ts:222](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L222)
@@ -143,29 +143,13 @@ Defined in: [async-debouncer.ts:219](https://github.com/TanStack/pacer/blob/main
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [async-debouncer.ts:252](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L252)
-
-Emits a change event for the async debouncer instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### abort()
 
 ```ts
 abort(): void;
 ```
 
-Defined in: [async-debouncer.ts:468](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L468)
+Defined in: [async-debouncer.ts:463](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L463)
 
 Aborts all ongoing executions with the internal abort controllers.
 Does NOT cancel any pending execution that have not started yet.
@@ -182,7 +166,7 @@ Does NOT cancel any pending execution that have not started yet.
 cancel(): void;
 ```
 
-Defined in: [async-debouncer.ts:480](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L480)
+Defined in: [async-debouncer.ts:475](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L475)
 
 Cancels any pending execution that have not started yet.
 Does NOT abort any execution already in progress.
@@ -199,7 +183,7 @@ Does NOT abort any execution already in progress.
 flush(): Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-debouncer.ts:403](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L403)
+Defined in: [async-debouncer.ts:398](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L398)
 
 Processes the current pending execution immediately
 
@@ -215,7 +199,7 @@ Processes the current pending execution immediately
 getAbortSignal(maybeExecuteCount?): AbortSignal | null;
 ```
 
-Defined in: [async-debouncer.ts:458](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L458)
+Defined in: [async-debouncer.ts:453](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L453)
 
 Returns the AbortSignal for a specific execution.
 If no maybeExecuteCount is provided, returns the signal for the most recent execution.
@@ -256,7 +240,7 @@ const debouncer = new AsyncDebouncer(
 maybeExecute(...args): Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-debouncer.ts:317](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L317)
+Defined in: [async-debouncer.ts:312](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L312)
 
 Attempts to execute the debounced function.
 If a call is already in progress, it will be queued.
@@ -292,7 +276,7 @@ The error from the debounced function if no onError handler is configured
 reset(): void;
 ```
 
-Defined in: [async-debouncer.ts:488](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L488)
+Defined in: [async-debouncer.ts:483](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L483)
 
 Resets the debouncer state to its default values
 
@@ -308,7 +292,7 @@ Resets the debouncer state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [async-debouncer.ts:257](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L257)
+Defined in: [async-debouncer.ts:252](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L252)
 
 Updates the async debouncer options
 
diff --git a/docs/reference/classes/AsyncQueuer.md b/docs/reference/classes/AsyncQueuer.md
index 808e8e4f..9195bd94 100644
--- a/docs/reference/classes/AsyncQueuer.md
+++ b/docs/reference/classes/AsyncQueuer.md
@@ -135,7 +135,7 @@ Defined in: [async-queuer.ts:328](https://github.com/TanStack/pacer/blob/main/pa
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [async-queuer.ts:319](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L319)
@@ -162,29 +162,13 @@ Defined in: [async-queuer.ts:316](https://github.com/TanStack/pacer/blob/main/pa
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [async-queuer.ts:366](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L366)
-
-Emits a change event for the async queuer instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### abort()
 
 ```ts
 abort(): void;
 ```
 
-Defined in: [async-queuer.ts:836](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L836)
+Defined in: [async-queuer.ts:831](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L831)
 
 Aborts all ongoing executions with the internal abort controllers.
 Does NOT clear out the items.
@@ -204,7 +188,7 @@ addItem(
    runOnItemsChange): boolean;
 ```
 
-Defined in: [async-queuer.ts:474](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L474)
+Defined in: [async-queuer.ts:469](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L469)
 
 Adds an item to the queue. If the queue is full, the item is rejected and onReject is called.
 Items can be inserted based on priority or at the front/back depending on configuration.
@@ -242,7 +226,7 @@ queuer.addItem('task2', 'front');
 clear(): void;
 ```
 
-Defined in: [async-queuer.ts:801](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L801)
+Defined in: [async-queuer.ts:796](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L796)
 
 Removes all pending items from the queue.
 Does NOT affect active tasks.
@@ -259,7 +243,7 @@ Does NOT affect active tasks.
 execute(position?): Promise<any>;
 ```
 
-Defined in: [async-queuer.ts:609](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L609)
+Defined in: [async-queuer.ts:604](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L604)
 
 Removes and returns the next item from the queue and executes the task function with it.
 
@@ -289,7 +273,7 @@ queuer.execute('back');
 flush(numberOfItems, position?): Promise<void>;
 ```
 
-Defined in: [async-queuer.ts:657](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L657)
+Defined in: [async-queuer.ts:652](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L652)
 
 Processes a specified number of items to execute immediately with no wait time
 If no numberOfItems is provided, all items will be processed
@@ -316,7 +300,7 @@ If no numberOfItems is provided, all items will be processed
 flushAsBatch(batchFunction): Promise<void>;
 ```
 
-Defined in: [async-queuer.ts:671](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L671)
+Defined in: [async-queuer.ts:666](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L666)
 
 Processes all items in the queue as a batch using the provided function as an argument
 The queue is cleared after processing
@@ -339,7 +323,7 @@ The queue is cleared after processing
 getAbortSignal(executeCount?): AbortSignal | null;
 ```
 
-Defined in: [async-queuer.ts:826](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L826)
+Defined in: [async-queuer.ts:821](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L821)
 
 Returns the AbortSignal for a specific execution.
 If no executeCount is provided, returns the signal for the most recent execution.
@@ -380,7 +364,7 @@ const queuer = new AsyncQueuer(
 getNextItem(position): TValue | undefined;
 ```
 
-Defined in: [async-queuer.ts:557](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L557)
+Defined in: [async-queuer.ts:552](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L552)
 
 Removes and returns the next item from the queue without executing the task function.
 Use for manual queue management. Normally, use execute() to process items.
@@ -412,7 +396,7 @@ queuer.getNextItem('back');
 peekActiveItems(): TValue[];
 ```
 
-Defined in: [async-queuer.ts:763](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L763)
+Defined in: [async-queuer.ts:758](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L758)
 
 Returns the items currently being processed (active tasks).
 
@@ -428,7 +412,7 @@ Returns the items currently being processed (active tasks).
 peekAllItems(): TValue[];
 ```
 
-Defined in: [async-queuer.ts:756](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L756)
+Defined in: [async-queuer.ts:751](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L751)
 
 Returns a copy of all items in the queue, including active and pending items.
 
@@ -444,7 +428,7 @@ Returns a copy of all items in the queue, including active and pending items.
 peekNextItem(position): TValue | undefined;
 ```
 
-Defined in: [async-queuer.ts:746](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L746)
+Defined in: [async-queuer.ts:741](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L741)
 
 Returns the next item in the queue without removing it.
 
@@ -473,7 +457,7 @@ queuer.peekNextItem('back'); // back
 peekPendingItems(): TValue[];
 ```
 
-Defined in: [async-queuer.ts:770](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L770)
+Defined in: [async-queuer.ts:765](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L765)
 
 Returns the items waiting to be processed (pending tasks).
 
@@ -489,7 +473,7 @@ Returns the items waiting to be processed (pending tasks).
 reset(): void;
 ```
 
-Defined in: [async-queuer.ts:847](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L847)
+Defined in: [async-queuer.ts:842](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L842)
 
 Resets the queuer state to its default values
 
@@ -505,7 +489,7 @@ Resets the queuer state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [async-queuer.ts:371](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L371)
+Defined in: [async-queuer.ts:366](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L366)
 
 Updates the queuer options. New options are merged with existing options.
 
@@ -527,7 +511,7 @@ Updates the queuer options. New options are merged with existing options.
 start(): void;
 ```
 
-Defined in: [async-queuer.ts:777](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L777)
+Defined in: [async-queuer.ts:772](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L772)
 
 Starts processing items in the queue. If already running, does nothing.
 
@@ -543,7 +527,7 @@ Starts processing items in the queue. If already running, does nothing.
 stop(): void;
 ```
 
-Defined in: [async-queuer.ts:787](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L787)
+Defined in: [async-queuer.ts:782](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L782)
 
 Stops processing items in the queue. Does not clear the queue.
 
diff --git a/docs/reference/classes/AsyncRateLimiter.md b/docs/reference/classes/AsyncRateLimiter.md
index d9c72e4a..dabb9c7c 100644
--- a/docs/reference/classes/AsyncRateLimiter.md
+++ b/docs/reference/classes/AsyncRateLimiter.md
@@ -136,7 +136,7 @@ Defined in: [async-rate-limiter.ts:255](https://github.com/TanStack/pacer/blob/m
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [async-rate-limiter.ts:249](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L249)
@@ -163,29 +163,13 @@ Defined in: [async-rate-limiter.ts:246](https://github.com/TanStack/pacer/blob/m
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [async-rate-limiter.ts:279](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L279)
-
-Emits a change event for the async rate limiter instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### abort()
 
 ```ts
 abort(): void;
 ```
 
-Defined in: [async-rate-limiter.ts:538](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L538)
+Defined in: [async-rate-limiter.ts:533](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L533)
 
 Aborts all ongoing executions with the internal abort controllers.
 Does NOT clear out the execution times or reset the rate limiter.
@@ -202,7 +186,7 @@ Does NOT clear out the execution times or reset the rate limiter.
 getAbortSignal(maybeExecuteCount?): AbortSignal | null;
 ```
 
-Defined in: [async-rate-limiter.ts:528](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L528)
+Defined in: [async-rate-limiter.ts:523](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L523)
 
 Returns the AbortSignal for a specific execution.
 If no maybeExecuteCount is provided, returns the signal for the most recent execution.
@@ -243,7 +227,7 @@ const rateLimiter = new AsyncRateLimiter(
 getMsUntilNextWindow(): number;
 ```
 
-Defined in: [async-rate-limiter.ts:500](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L500)
+Defined in: [async-rate-limiter.ts:495](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L495)
 
 Returns the number of milliseconds until the next execution will be possible
 For fixed windows, this is the time until the current window resets
@@ -261,7 +245,7 @@ For sliding windows, this is the time until the oldest execution expires
 getRemainingInWindow(): number;
 ```
 
-Defined in: [async-rate-limiter.ts:490](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L490)
+Defined in: [async-rate-limiter.ts:485](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L485)
 
 Returns the number of remaining executions allowed in the current window
 
@@ -277,7 +261,7 @@ Returns the number of remaining executions allowed in the current window
 maybeExecute(...args): Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-rate-limiter.ts:357](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L357)
+Defined in: [async-rate-limiter.ts:352](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L352)
 
 Attempts to execute the rate-limited function if within the configured limits.
 Will reject execution if the number of calls in the current window exceeds the limit.
@@ -325,7 +309,7 @@ const result2 = await rateLimiter.maybeExecute('arg1', 'arg2'); // undefined
 reset(): void;
 ```
 
-Defined in: [async-rate-limiter.ts:549](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L549)
+Defined in: [async-rate-limiter.ts:544](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L544)
 
 Resets the rate limiter state
 
@@ -341,7 +325,7 @@ Resets the rate limiter state
 setOptions(newOptions): void;
 ```
 
-Defined in: [async-rate-limiter.ts:284](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L284)
+Defined in: [async-rate-limiter.ts:279](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L279)
 
 Updates the async rate limiter options
 
diff --git a/docs/reference/classes/AsyncRetryer.md b/docs/reference/classes/AsyncRetryer.md
index 5f88d2d5..30814b9a 100644
--- a/docs/reference/classes/AsyncRetryer.md
+++ b/docs/reference/classes/AsyncRetryer.md
@@ -152,7 +152,7 @@ The async function to retry
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [async-retryer.ts:292](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L292)
@@ -189,29 +189,13 @@ Defined in: [async-retryer.ts:289](https://github.com/TanStack/pacer/blob/main/p
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [async-retryer.ts:325](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L325)
-
-Emits a change event for the async retryer instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### abort()
 
 ```ts
 abort(reason): void;
 ```
 
-Defined in: [async-retryer.ts:608](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L608)
+Defined in: [async-retryer.ts:603](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L603)
 
 Cancels the current execution and any pending retries
 
@@ -235,7 +219,7 @@ The reason for the abort (defaults to 'manual')
 execute(...args): Promise<Awaited<ReturnType<TFn>> | undefined>;
 ```
 
-Defined in: [async-retryer.ts:415](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L415)
+Defined in: [async-retryer.ts:410](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L410)
 
 Executes the function with retry logic
 
@@ -265,7 +249,7 @@ The last error if throwOnError is true and all retries fail
 getAbortSignal(): AbortSignal | null;
 ```
 
-Defined in: [async-retryer.ts:600](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L600)
+Defined in: [async-retryer.ts:595](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L595)
 
 Returns the current AbortSignal for the executing operation.
 Use this signal in your async function to make it cancellable.
@@ -298,7 +282,7 @@ retryer.abort()
 reset(): void;
 ```
 
-Defined in: [async-retryer.ts:628](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L628)
+Defined in: [async-retryer.ts:623](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L623)
 
 Resets the retryer to its initial state
 
@@ -314,7 +298,7 @@ Resets the retryer to its initial state
 setOptions(newOptions): void;
 ```
 
-Defined in: [async-retryer.ts:331](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L331)
+Defined in: [async-retryer.ts:326](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L326)
 
 Updates the retryer options
 
diff --git a/docs/reference/classes/AsyncThrottler.md b/docs/reference/classes/AsyncThrottler.md
index 7cafba0f..9c85f23e 100644
--- a/docs/reference/classes/AsyncThrottler.md
+++ b/docs/reference/classes/AsyncThrottler.md
@@ -120,7 +120,7 @@ Defined in: [async-throttler.ts:243](https://github.com/TanStack/pacer/blob/main
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [async-throttler.ts:234](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L234)
@@ -147,29 +147,13 @@ Defined in: [async-throttler.ts:231](https://github.com/TanStack/pacer/blob/main
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [async-throttler.ts:264](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L264)
-
-Emits a change event for the async throttler instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### abort()
 
 ```ts
 abort(): void;
 ```
 
-Defined in: [async-throttler.ts:532](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L532)
+Defined in: [async-throttler.ts:527](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L527)
 
 Aborts all ongoing executions with the internal abort controllers.
 Does NOT cancel any pending execution that have not started yet.
@@ -186,7 +170,7 @@ Does NOT cancel any pending execution that have not started yet.
 cancel(): void;
 ```
 
-Defined in: [async-throttler.ts:542](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L542)
+Defined in: [async-throttler.ts:537](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L537)
 
 Cancels any pending execution that have not started yet.
 Does NOT abort any execution already in progress.
@@ -203,7 +187,7 @@ Does NOT abort any execution already in progress.
 flush(): Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-throttler.ts:461](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L461)
+Defined in: [async-throttler.ts:456](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L456)
 
 Processes the current pending execution immediately
 
@@ -219,7 +203,7 @@ Processes the current pending execution immediately
 getAbortSignal(maybeExecuteCount?): AbortSignal | null;
 ```
 
-Defined in: [async-throttler.ts:522](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L522)
+Defined in: [async-throttler.ts:517](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L517)
 
 Returns the AbortSignal for a specific execution.
 If no maybeExecuteCount is provided, returns the signal for the most recent execution.
@@ -264,7 +248,7 @@ const throttler = new AsyncThrottler(
 maybeExecute(...args): Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-throttler.ts:337](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L337)
+Defined in: [async-throttler.ts:332](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L332)
 
 Attempts to execute the throttled function. The execution behavior depends on the throttler options:
 
@@ -306,7 +290,7 @@ await throttled.maybeExecute('c', 'd');
 reset(): void;
 ```
 
-Defined in: [async-throttler.ts:556](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L556)
+Defined in: [async-throttler.ts:551](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L551)
 
 Resets the debouncer state to its default values
 
@@ -322,7 +306,7 @@ Resets the debouncer state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [async-throttler.ts:269](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L269)
+Defined in: [async-throttler.ts:264](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L264)
 
 Updates the async throttler options
 
diff --git a/docs/reference/classes/Batcher.md b/docs/reference/classes/Batcher.md
index 6221b763..1adbce9d 100644
--- a/docs/reference/classes/Batcher.md
+++ b/docs/reference/classes/Batcher.md
@@ -101,7 +101,7 @@ Defined in: [batcher.ts:154](https://github.com/TanStack/pacer/blob/main/package
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [batcher.ts:149](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L149)
@@ -128,29 +128,13 @@ Defined in: [batcher.ts:146](https://github.com/TanStack/pacer/blob/main/package
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [batcher.ts:174](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L174)
-
-Emits a change event for the batcher instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### addItem()
 
 ```ts
 addItem(item): void;
 ```
 
-Defined in: [batcher.ts:210](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L210)
+Defined in: [batcher.ts:205](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L205)
 
 Adds an item to the batcher
 If the batch size is reached, timeout occurs, or shouldProcess returns true, the batch will be processed
@@ -173,7 +157,7 @@ If the batch size is reached, timeout occurs, or shouldProcess returns true, the
 cancel(): void;
 ```
 
-Defined in: [batcher.ts:288](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L288)
+Defined in: [batcher.ts:283](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L283)
 
 Cancels any pending execution that was scheduled.
 Does NOT clear out the items.
@@ -190,7 +174,7 @@ Does NOT clear out the items.
 clear(): void;
 ```
 
-Defined in: [batcher.ts:280](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L280)
+Defined in: [batcher.ts:275](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L275)
 
 Removes all items from the batcher
 
@@ -206,7 +190,7 @@ Removes all items from the batcher
 flush(): void;
 ```
 
-Defined in: [batcher.ts:258](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L258)
+Defined in: [batcher.ts:253](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L253)
 
 Processes the current batch of items immediately
 
@@ -222,7 +206,7 @@ Processes the current batch of items immediately
 peekAllItems(): TValue[];
 ```
 
-Defined in: [batcher.ts:266](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L266)
+Defined in: [batcher.ts:261](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L261)
 
 Returns a copy of all items in the batcher
 
@@ -238,7 +222,7 @@ Returns a copy of all items in the batcher
 reset(): void;
 ```
 
-Defined in: [batcher.ts:296](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L296)
+Defined in: [batcher.ts:291](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L291)
 
 Resets the batcher state to its default values
 
@@ -254,7 +238,7 @@ Resets the batcher state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [batcher.ts:179](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L179)
+Defined in: [batcher.ts:174](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L174)
 
 Updates the batcher options
 
diff --git a/docs/reference/classes/Debouncer.md b/docs/reference/classes/Debouncer.md
index 29c206a8..d18f515b 100644
--- a/docs/reference/classes/Debouncer.md
+++ b/docs/reference/classes/Debouncer.md
@@ -84,7 +84,7 @@ Defined in: [debouncer.ts:151](https://github.com/TanStack/pacer/blob/main/packa
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [debouncer.ts:146](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L146)
@@ -111,29 +111,13 @@ Defined in: [debouncer.ts:143](https://github.com/TanStack/pacer/blob/main/packa
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [debouncer.ts:171](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L171)
-
-Emits a change event for the debouncer instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### cancel()
 
 ```ts
 cancel(): void;
 ```
 
-Defined in: [debouncer.ts:286](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L286)
+Defined in: [debouncer.ts:281](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L281)
 
 Cancels any pending execution
 
@@ -149,7 +133,7 @@ Cancels any pending execution
 flush(): void;
 ```
 
-Defined in: [debouncer.ts:269](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L269)
+Defined in: [debouncer.ts:264](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L264)
 
 Processes the current pending execution immediately
 
@@ -165,7 +149,7 @@ Processes the current pending execution immediately
 maybeExecute(...args): void;
 ```
 
-Defined in: [debouncer.ts:222](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L222)
+Defined in: [debouncer.ts:217](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L217)
 
 Attempts to execute the debounced function
 If a call is already in progress, it will be queued
@@ -188,7 +172,7 @@ If a call is already in progress, it will be queued
 reset(): void;
 ```
 
-Defined in: [debouncer.ts:297](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L297)
+Defined in: [debouncer.ts:292](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L292)
 
 Resets the debouncer state to its default values
 
@@ -204,7 +188,7 @@ Resets the debouncer state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [debouncer.ts:176](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L176)
+Defined in: [debouncer.ts:171](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L171)
 
 Updates the debouncer options
 
diff --git a/docs/reference/classes/Queuer.md b/docs/reference/classes/Queuer.md
index fbe28946..4c63fc38 100644
--- a/docs/reference/classes/Queuer.md
+++ b/docs/reference/classes/Queuer.md
@@ -135,7 +135,7 @@ Defined in: [queuer.ts:278](https://github.com/TanStack/pacer/blob/main/packages
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [queuer.ts:273](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L273)
@@ -162,22 +162,6 @@ Defined in: [queuer.ts:270](https://github.com/TanStack/pacer/blob/main/packages
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [queuer.ts:315](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L315)
-
-Emits a change event for the queuer instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### addItem()
 
 ```ts
@@ -187,7 +171,7 @@ addItem(
    runOnItemsChange): boolean;
 ```
 
-Defined in: [queuer.ts:404](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L404)
+Defined in: [queuer.ts:399](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L399)
 
 Adds an item to the queue. If the queue is full, the item is rejected and onReject is called.
 Items can be inserted based on priority or at the front/back depending on configuration.
@@ -226,7 +210,7 @@ queuer.addItem('task2', 'front');
 clear(): void;
 ```
 
-Defined in: [queuer.ts:686](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L686)
+Defined in: [queuer.ts:681](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L681)
 
 Removes all pending items from the queue. Does not affect items being processed.
 
@@ -242,7 +226,7 @@ Removes all pending items from the queue. Does not affect items being processed.
 execute(position?): TValue | undefined;
 ```
 
-Defined in: [queuer.ts:540](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L540)
+Defined in: [queuer.ts:535](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L535)
 
 Removes and returns the next item from the queue and processes it using the provided function.
 
@@ -271,7 +255,7 @@ queuer.execute('back');
 flush(numberOfItems, position?): void;
 ```
 
-Defined in: [queuer.ts:556](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L556)
+Defined in: [queuer.ts:551](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L551)
 
 Processes a specified number of items to execute immediately with no wait time
 If no numberOfItems is provided, all items will be processed
@@ -298,7 +282,7 @@ If no numberOfItems is provided, all items will be processed
 flushAsBatch(batchFunction): void;
 ```
 
-Defined in: [queuer.ts:571](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L571)
+Defined in: [queuer.ts:566](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L566)
 
 Processes all items in the queue as a batch using the provided function as an argument
 The queue is cleared after processing
@@ -321,7 +305,7 @@ The queue is cleared after processing
 getNextItem(position): TValue | undefined;
 ```
 
-Defined in: [queuer.ts:488](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L488)
+Defined in: [queuer.ts:483](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L483)
 
 Removes and returns the next item from the queue without executing the function.
 Use for manual queue management. Normally, use execute() to process items.
@@ -352,7 +336,7 @@ queuer.getNextItem('back');
 peekAllItems(): TValue[];
 ```
 
-Defined in: [queuer.ts:654](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L654)
+Defined in: [queuer.ts:649](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L649)
 
 Returns a copy of all items in the queue.
 
@@ -368,7 +352,7 @@ Returns a copy of all items in the queue.
 peekNextItem(position): TValue | undefined;
 ```
 
-Defined in: [queuer.ts:644](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L644)
+Defined in: [queuer.ts:639](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L639)
 
 Returns the next item in the queue without removing it.
 
@@ -396,7 +380,7 @@ queuer.peekNextItem('back'); // back
 reset(): void;
 ```
 
-Defined in: [queuer.ts:694](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L694)
+Defined in: [queuer.ts:689](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L689)
 
 Resets the queuer state to its default values
 
@@ -412,7 +396,7 @@ Resets the queuer state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [queuer.ts:320](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L320)
+Defined in: [queuer.ts:315](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L315)
 
 Updates the queuer options. New options are merged with existing options.
 
@@ -434,7 +418,7 @@ Updates the queuer options. New options are merged with existing options.
 start(): void;
 ```
 
-Defined in: [queuer.ts:661](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L661)
+Defined in: [queuer.ts:656](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L656)
 
 Starts processing items in the queue. If already isRunning, does nothing.
 
@@ -450,7 +434,7 @@ Starts processing items in the queue. If already isRunning, does nothing.
 stop(): void;
 ```
 
-Defined in: [queuer.ts:671](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L671)
+Defined in: [queuer.ts:666](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L666)
 
 Stops processing items in the queue. Does not clear the queue.
 
diff --git a/docs/reference/classes/RateLimiter.md b/docs/reference/classes/RateLimiter.md
index aabc3629..103f70b4 100644
--- a/docs/reference/classes/RateLimiter.md
+++ b/docs/reference/classes/RateLimiter.md
@@ -97,7 +97,7 @@ Defined in: [rate-limiter.ts:164](https://github.com/TanStack/pacer/blob/main/pa
 ### key
 
 ```ts
-key: string;
+key: string | undefined;
 ```
 
 Defined in: [rate-limiter.ts:159](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L159)
@@ -124,29 +124,13 @@ Defined in: [rate-limiter.ts:157](https://github.com/TanStack/pacer/blob/main/pa
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [rate-limiter.ts:187](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L187)
-
-Emits a change event for the rate limiter instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### getMsUntilNextWindow()
 
 ```ts
 getMsUntilNextWindow(): number;
 ```
 
-Defined in: [rate-limiter.ts:359](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L359)
+Defined in: [rate-limiter.ts:354](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L354)
 
 Returns the number of milliseconds until the next execution will be possible
 
@@ -162,7 +146,7 @@ Returns the number of milliseconds until the next execution will be possible
 getRemainingInWindow(): number;
 ```
 
-Defined in: [rate-limiter.ts:351](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L351)
+Defined in: [rate-limiter.ts:346](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L346)
 
 Returns the number of remaining executions allowed in the current window
 
@@ -178,7 +162,7 @@ Returns the number of remaining executions allowed in the current window
 maybeExecute(...args): boolean;
 ```
 
-Defined in: [rate-limiter.ts:253](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L253)
+Defined in: [rate-limiter.ts:248](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L248)
 
 Attempts to execute the rate-limited function if within the configured limits.
 Will reject execution if the number of calls in the current window exceeds the limit.
@@ -213,7 +197,7 @@ rateLimiter.maybeExecute('arg1', 'arg2'); // false
 reset(): void;
 ```
 
-Defined in: [rate-limiter.ts:370](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L370)
+Defined in: [rate-limiter.ts:365](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L365)
 
 Resets the rate limiter state
 
@@ -229,7 +213,7 @@ Resets the rate limiter state
 setOptions(newOptions): void;
 ```
 
-Defined in: [rate-limiter.ts:192](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L192)
+Defined in: [rate-limiter.ts:187](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L187)
 
 Updates the rate limiter options
 
diff --git a/docs/reference/classes/Throttler.md b/docs/reference/classes/Throttler.md
index 0c63a908..0c11bfaf 100644
--- a/docs/reference/classes/Throttler.md
+++ b/docs/reference/classes/Throttler.md
@@ -115,29 +115,13 @@ Defined in: [throttler.ts:151](https://github.com/TanStack/pacer/blob/main/packa
 
 ## Methods
 
-### \_emit()
-
-```ts
-_emit(): void;
-```
-
-Defined in: [throttler.ts:179](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L179)
-
-Emits a change event for the throttler instance. Mostly useful for devtools.
-
-#### Returns
-
-`void`
-
-***
-
 ### cancel()
 
 ```ts
 cancel(): void;
 ```
 
-Defined in: [throttler.ts:323](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L323)
+Defined in: [throttler.ts:318](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L318)
 
 Cancels any pending trailing execution and clears internal state.
 
@@ -159,7 +143,7 @@ Has no effect if there is no pending execution.
 flush(): void;
 ```
 
-Defined in: [throttler.ts:301](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L301)
+Defined in: [throttler.ts:296](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L296)
 
 Processes the current pending execution immediately
 
@@ -175,7 +159,7 @@ Processes the current pending execution immediately
 maybeExecute(...args): void;
 ```
 
-Defined in: [throttler.ts:242](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L242)
+Defined in: [throttler.ts:237](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L237)
 
 Attempts to execute the throttled function. The execution behavior depends on the throttler options:
 
@@ -217,7 +201,7 @@ throttled.maybeExecute('c', 'd');
 reset(): void;
 ```
 
-Defined in: [throttler.ts:334](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L334)
+Defined in: [throttler.ts:329](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L329)
 
 Resets the throttler state to its default values
 
@@ -233,7 +217,7 @@ Resets the throttler state to its default values
 setOptions(newOptions): void;
 ```
 
-Defined in: [throttler.ts:184](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L184)
+Defined in: [throttler.ts:179](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L179)
 
 Updates the throttler options
 
diff --git a/docs/reference/functions/asyncBatch.md b/docs/reference/functions/asyncBatch.md
index 8f4c8f4a..4bd1de20 100644
--- a/docs/reference/functions/asyncBatch.md
+++ b/docs/reference/functions/asyncBatch.md
@@ -9,7 +9,7 @@ title: asyncBatch
 function asyncBatch<TValue>(fn, options): (item) => Promise<any>;
 ```
 
-Defined in: [async-batcher.ts:587](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L587)
+Defined in: [async-batcher.ts:582](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-batcher.ts#L582)
 
 Creates an async batcher that processes items in batches.
 
diff --git a/docs/reference/functions/asyncDebounce.md b/docs/reference/functions/asyncDebounce.md
index 7245d2e8..dc2ceaf6 100644
--- a/docs/reference/functions/asyncDebounce.md
+++ b/docs/reference/functions/asyncDebounce.md
@@ -9,7 +9,7 @@ title: asyncDebounce
 function asyncDebounce<TFn>(fn, initialOptions): (...args) => Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-debouncer.ts:558](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L558)
+Defined in: [async-debouncer.ts:553](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-debouncer.ts#L553)
 
 Creates an async debounced function that delays execution until after a specified wait time.
 The debounced function will only execute once the wait period has elapsed without any new calls.
diff --git a/docs/reference/functions/asyncQueue.md b/docs/reference/functions/asyncQueue.md
index 843f8ad1..3fce7f4d 100644
--- a/docs/reference/functions/asyncQueue.md
+++ b/docs/reference/functions/asyncQueue.md
@@ -9,7 +9,7 @@ title: asyncQueue
 function asyncQueue<TValue>(fn, initialOptions): (item, position, runOnItemsChange) => boolean;
 ```
 
-Defined in: [async-queuer.ts:919](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L919)
+Defined in: [async-queuer.ts:914](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-queuer.ts#L914)
 
 Creates a new AsyncQueuer instance and returns a bound addItem function for adding tasks.
 The queuer is started automatically and ready to process items.
diff --git a/docs/reference/functions/asyncRateLimit.md b/docs/reference/functions/asyncRateLimit.md
index 63089c62..79a467c1 100644
--- a/docs/reference/functions/asyncRateLimit.md
+++ b/docs/reference/functions/asyncRateLimit.md
@@ -9,7 +9,7 @@ title: asyncRateLimit
 function asyncRateLimit<TFn>(fn, initialOptions): (...args) => Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-rate-limiter.ts:640](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L640)
+Defined in: [async-rate-limiter.ts:635](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-rate-limiter.ts#L635)
 
 Creates an async rate-limited function that will execute the provided function up to a maximum number of times within a time window.
 
diff --git a/docs/reference/functions/asyncRetry.md b/docs/reference/functions/asyncRetry.md
index 44018141..ddf3756f 100644
--- a/docs/reference/functions/asyncRetry.md
+++ b/docs/reference/functions/asyncRetry.md
@@ -9,7 +9,7 @@ title: asyncRetry
 function asyncRetry<TFn>(fn, initialOptions): (...args) => Promise<Awaited<ReturnType<TFn>> | undefined>;
 ```
 
-Defined in: [async-retryer.ts:663](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L663)
+Defined in: [async-retryer.ts:658](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-retryer.ts#L658)
 
 Creates a retry-enabled version of an async function. This is a convenience wrapper
 around the AsyncRetryer class that returns the execute method.
diff --git a/docs/reference/functions/asyncThrottle.md b/docs/reference/functions/asyncThrottle.md
index 270fcf59..6c74d5fb 100644
--- a/docs/reference/functions/asyncThrottle.md
+++ b/docs/reference/functions/asyncThrottle.md
@@ -9,7 +9,7 @@ title: asyncThrottle
 function asyncThrottle<TFn>(fn, initialOptions): (...args) => Promise<ReturnType<TFn> | undefined>;
 ```
 
-Defined in: [async-throttler.ts:626](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L626)
+Defined in: [async-throttler.ts:621](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/async-throttler.ts#L621)
 
 Creates an async throttled function that limits how often the function can execute.
 The throttled function will execute at most once per wait period, even if called multiple times.
diff --git a/docs/reference/functions/batch.md b/docs/reference/functions/batch.md
index 794f35c1..50e7b269 100644
--- a/docs/reference/functions/batch.md
+++ b/docs/reference/functions/batch.md
@@ -9,7 +9,7 @@ title: batch
 function batch<TValue>(fn, options): (item) => void;
 ```
 
-Defined in: [batcher.ts:322](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L322)
+Defined in: [batcher.ts:317](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/batcher.ts#L317)
 
 Creates a batcher that processes items in batches.
 
diff --git a/docs/reference/functions/createKey.md b/docs/reference/functions/createKey.md
deleted file mode 100644
index 9ed412b7..00000000
--- a/docs/reference/functions/createKey.md
+++ /dev/null
@@ -1,22 +0,0 @@
----
-id: createKey
-title: createKey
----
-
-# Function: createKey()
-
-```ts
-function createKey(key?): string;
-```
-
-Defined in: [utils.ts:14](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/utils.ts#L14)
-
-## Parameters
-
-### key?
-
-`string`
-
-## Returns
-
-`string`
diff --git a/docs/reference/functions/debounce.md b/docs/reference/functions/debounce.md
index 76080383..930f407b 100644
--- a/docs/reference/functions/debounce.md
+++ b/docs/reference/functions/debounce.md
@@ -9,7 +9,7 @@ title: debounce
 function debounce<TFn>(fn, initialOptions): (...args) => void;
 ```
 
-Defined in: [debouncer.ts:329](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L329)
+Defined in: [debouncer.ts:324](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/debouncer.ts#L324)
 
 Creates a debounced function that delays invoking the provided function until after a specified wait time.
 Multiple calls during the wait period will cancel previous pending invocations and reset the timer.
diff --git a/docs/reference/functions/queue.md b/docs/reference/functions/queue.md
index b7e89d84..54f302b4 100644
--- a/docs/reference/functions/queue.md
+++ b/docs/reference/functions/queue.md
@@ -9,7 +9,7 @@ title: queue
 function queue<TValue>(fn, initialOptions): (item, position, runOnItemsChange) => boolean;
 ```
 
-Defined in: [queuer.ts:735](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L735)
+Defined in: [queuer.ts:730](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/queuer.ts#L730)
 
 Creates a queue that processes items immediately upon addition.
 Items are processed sequentially in FIFO order by default.
diff --git a/docs/reference/functions/rateLimit.md b/docs/reference/functions/rateLimit.md
index b6a37937..4d79425e 100644
--- a/docs/reference/functions/rateLimit.md
+++ b/docs/reference/functions/rateLimit.md
@@ -9,7 +9,7 @@ title: rateLimit
 function rateLimit<TFn>(fn, initialOptions): (...args) => boolean;
 ```
 
-Defined in: [rate-limiter.ts:424](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L424)
+Defined in: [rate-limiter.ts:419](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/rate-limiter.ts#L419)
 
 Creates a rate-limited function that will execute the provided function up to a maximum number of times within a time window.
 
diff --git a/docs/reference/functions/throttle.md b/docs/reference/functions/throttle.md
index e2dd3d84..7b73ff78 100644
--- a/docs/reference/functions/throttle.md
+++ b/docs/reference/functions/throttle.md
@@ -9,7 +9,7 @@ title: throttle
 function throttle<TFn>(fn, initialOptions): (...args) => void;
 ```
 
-Defined in: [throttler.ts:375](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L375)
+Defined in: [throttler.ts:370](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/throttler.ts#L370)
 
 Creates a throttled function that limits how often the provided function can execute.
 
diff --git a/docs/reference/index.md b/docs/reference/index.md
index 006d9e4e..a6db5b46 100644
--- a/docs/reference/index.md
+++ b/docs/reference/index.md
@@ -72,7 +72,6 @@ title: "@tanstack/pacer"
 - [asyncThrottle](../functions/asyncThrottle.md)
 - [asyncThrottlerOptions](../functions/asyncThrottlerOptions.md)
 - [batch](../functions/batch.md)
-- [createKey](../functions/createKey.md)
 - [debounce](../functions/debounce.md)
 - [debouncerOptions](../functions/debouncerOptions.md)
 - [isFunction](../functions/isFunction.md)
diff --git a/docs/reference/variables/pacerEventClient.md b/docs/reference/variables/pacerEventClient.md
index 6ce58ebf..6f98a5d6 100644
--- a/docs/reference/variables/pacerEventClient.md
+++ b/docs/reference/variables/pacerEventClient.md
@@ -9,4 +9,4 @@ title: pacerEventClient
 const pacerEventClient: PacerEventClient;
 ```
 
-Defined in: [event-client.ts:66](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/event-client.ts#L66)
+Defined in: [event-client.ts:68](https://github.com/TanStack/pacer/blob/main/packages/pacer/src/event-client.ts#L68)
diff --git a/packages/pacer/src/async-batcher.ts b/packages/pacer/src/async-batcher.ts
index 1a838da0..94d65854 100644
--- a/packages/pacer/src/async-batcher.ts
+++ b/packages/pacer/src/async-batcher.ts
@@ -1,6 +1,6 @@
 import { Store } from '@tanstack/store'
 import { AsyncRetryer } from './async-retryer'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AsyncRetryerOptions } from './async-retryer'
 import type { OptionalKeys } from './types'
@@ -266,7 +266,7 @@ export class AsyncBatcher<TValue> {
   readonly store: Store<Readonly<AsyncBatcherState<TValue>>> = new Store(
     getDefaultAsyncBatcherState<TValue>(),
   )
-  key: string
+  key: string | undefined
   options: AsyncBatcherOptionsWithOptionalCallbacks<TValue>
   asyncRetryers = new Map<
     number,
@@ -278,7 +278,7 @@ export class AsyncBatcher<TValue> {
     public fn: (items: Array<TValue>) => Promise<any>,
     initialOptions: AsyncBatcherOptions<TValue>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -293,11 +293,6 @@ export class AsyncBatcher<TValue> {
     })
   }
 
-  /**
-   * Emits a change event for the async batcher instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('AsyncBatcher', this)
-
   /**
    * Updates the async batcher options
    */
diff --git a/packages/pacer/src/async-debouncer.ts b/packages/pacer/src/async-debouncer.ts
index 8b54106b..e3a8b4e7 100644
--- a/packages/pacer/src/async-debouncer.ts
+++ b/packages/pacer/src/async-debouncer.ts
@@ -1,6 +1,6 @@
 import { Store } from '@tanstack/store'
 import { AsyncRetryer } from './async-retryer'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AsyncRetryerOptions } from './async-retryer'
 import type { AnyAsyncFunction, OptionalKeys } from './types'
@@ -219,7 +219,7 @@ export class AsyncDebouncer<TFn extends AnyAsyncFunction> {
   readonly store: Store<Readonly<AsyncDebouncerState<TFn>>> = new Store<
     AsyncDebouncerState<TFn>
   >(getDefaultAsyncDebouncerState<TFn>())
-  key: string
+  key: string | undefined
   options: AsyncDebouncerOptions<TFn>
   asyncRetryers = new Map<number, AsyncRetryer<TFn>>()
   #timeoutId: NodeJS.Timeout | null = null
@@ -231,7 +231,7 @@ export class AsyncDebouncer<TFn extends AnyAsyncFunction> {
     public fn: TFn,
     initialOptions: AsyncDebouncerOptions<TFn>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -246,11 +246,6 @@ export class AsyncDebouncer<TFn extends AnyAsyncFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the async debouncer instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('AsyncDebouncer', this)
-
   /**
    * Updates the async debouncer options
    */
diff --git a/packages/pacer/src/async-queuer.ts b/packages/pacer/src/async-queuer.ts
index 0808d275..d26816ab 100644
--- a/packages/pacer/src/async-queuer.ts
+++ b/packages/pacer/src/async-queuer.ts
@@ -1,6 +1,6 @@
 import { Store } from '@tanstack/store'
 import { AsyncRetryer } from './async-retryer'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AsyncRetryerOptions } from './async-retryer'
 import type { OptionalKeys } from './types'
@@ -316,7 +316,7 @@ export class AsyncQueuer<TValue> {
   readonly store: Store<Readonly<AsyncQueuerState<TValue>>> = new Store<
     AsyncQueuerState<TValue>
   >(getDefaultAsyncQueuerState<TValue>())
-  key: string
+  key: string | undefined
   options: AsyncQueuerOptions<TValue>
   asyncRetryers = new Map<
     number,
@@ -328,7 +328,7 @@ export class AsyncQueuer<TValue> {
     public fn: (item: TValue) => Promise<any>,
     initialOptions: AsyncQueuerOptions<TValue> = {},
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -360,11 +360,6 @@ export class AsyncQueuer<TValue> {
     })
   }
 
-  /**
-   * Emits a change event for the async queuer instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('AsyncQueuer', this)
-
   /**
    * Updates the queuer options. New options are merged with existing options.
    */
diff --git a/packages/pacer/src/async-rate-limiter.ts b/packages/pacer/src/async-rate-limiter.ts
index 299369ac..279db060 100644
--- a/packages/pacer/src/async-rate-limiter.ts
+++ b/packages/pacer/src/async-rate-limiter.ts
@@ -1,6 +1,6 @@
 import { Store } from '@tanstack/store'
 import { AsyncRetryer } from './async-retryer'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AsyncRetryerOptions } from './async-retryer'
 import type { AnyAsyncFunction } from './types'
@@ -246,7 +246,7 @@ export class AsyncRateLimiter<TFn extends AnyAsyncFunction> {
   readonly store: Store<Readonly<AsyncRateLimiterState<TFn>>> = new Store<
     AsyncRateLimiterState<TFn>
   >(getDefaultAsyncRateLimiterState<TFn>())
-  key: string
+  key: string | undefined
   options: AsyncRateLimiterOptions<TFn>
   asyncRetryers = new Map<number, AsyncRetryer<TFn>>()
   #timeoutIds: Set<NodeJS.Timeout> = new Set()
@@ -255,7 +255,7 @@ export class AsyncRateLimiter<TFn extends AnyAsyncFunction> {
     public fn: TFn,
     initialOptions: AsyncRateLimiterOptions<TFn>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -273,11 +273,6 @@ export class AsyncRateLimiter<TFn extends AnyAsyncFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the async rate limiter instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('AsyncRateLimiter', this)
-
   /**
    * Updates the async rate limiter options
    */
diff --git a/packages/pacer/src/async-retryer.ts b/packages/pacer/src/async-retryer.ts
index 8f9a23e2..edfbc88a 100644
--- a/packages/pacer/src/async-retryer.ts
+++ b/packages/pacer/src/async-retryer.ts
@@ -1,5 +1,5 @@
 import { Store } from '@tanstack/store'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AnyAsyncFunction } from './types'
 
@@ -289,7 +289,7 @@ export class AsyncRetryer<TFn extends AnyAsyncFunction> {
   readonly store: Store<Readonly<AsyncRetryerState<TFn>>> = new Store(
     getDefaultAsyncRetryerState<TFn>(),
   )
-  key: string
+  key: string | undefined
   options: AsyncRetryerOptions<TFn> & typeof defaultOptions
   #abortController: AbortController | null = null
 
@@ -302,7 +302,7 @@ export class AsyncRetryer<TFn extends AnyAsyncFunction> {
     public fn: TFn,
     initialOptions: AsyncRetryerOptions<TFn> = {},
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -319,11 +319,6 @@ export class AsyncRetryer<TFn extends AnyAsyncFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the async retryer instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('AsyncRetryer', this)
-
   /**
    * Updates the retryer options
    * @param newOptions Partial options to merge with existing options
diff --git a/packages/pacer/src/async-throttler.ts b/packages/pacer/src/async-throttler.ts
index 9b261c39..8f14c70d 100644
--- a/packages/pacer/src/async-throttler.ts
+++ b/packages/pacer/src/async-throttler.ts
@@ -1,6 +1,6 @@
 import { Store } from '@tanstack/store'
 import { AsyncRetryer } from './async-retryer'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AsyncRetryerOptions } from './async-retryer'
 import type { AnyAsyncFunction, OptionalKeys } from './types'
@@ -231,7 +231,7 @@ export class AsyncThrottler<TFn extends AnyAsyncFunction> {
   readonly store: Store<Readonly<AsyncThrottlerState<TFn>>> = new Store<
     AsyncThrottlerState<TFn>
   >(getDefaultAsyncThrottlerState<TFn>())
-  key: string
+  key: string | undefined
   options: AsyncThrottlerOptions<TFn>
   asyncRetryers = new Map<number, AsyncRetryer<TFn>>()
   #timeoutId: NodeJS.Timeout | null = null
@@ -243,7 +243,7 @@ export class AsyncThrottler<TFn extends AnyAsyncFunction> {
     public fn: TFn,
     initialOptions: AsyncThrottlerOptions<TFn>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -258,11 +258,6 @@ export class AsyncThrottler<TFn extends AnyAsyncFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the async throttler instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('AsyncThrottler', this)
-
   /**
    * Updates the async throttler options
    */
diff --git a/packages/pacer/src/batcher.ts b/packages/pacer/src/batcher.ts
index 681e6daf..2c6d843a 100644
--- a/packages/pacer/src/batcher.ts
+++ b/packages/pacer/src/batcher.ts
@@ -1,5 +1,5 @@
 import { Store } from '@tanstack/store'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { OptionalKeys } from './types'
 
@@ -146,7 +146,7 @@ export class Batcher<TValue> {
   readonly store: Store<Readonly<BatcherState<TValue>>> = new Store(
     getDefaultBatcherState<TValue>(),
   )
-  key: string
+  key: string | undefined
   options: BatcherOptionsWithOptionalCallbacks<TValue>
   #timeoutId: NodeJS.Timeout | null = null
 
@@ -154,7 +154,7 @@ export class Batcher<TValue> {
     public fn: (items: Array<TValue>) => void,
     initialOptions: BatcherOptions<TValue>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -168,11 +168,6 @@ export class Batcher<TValue> {
     })
   }
 
-  /**
-   * Emits a change event for the batcher instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('Batcher', this)
-
   /**
    * Updates the batcher options
    */
diff --git a/packages/pacer/src/debouncer.ts b/packages/pacer/src/debouncer.ts
index a8caf24e..216eec5c 100644
--- a/packages/pacer/src/debouncer.ts
+++ b/packages/pacer/src/debouncer.ts
@@ -1,5 +1,5 @@
 import { Store } from '@tanstack/store'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AnyFunction } from './types'
 
@@ -143,7 +143,7 @@ export class Debouncer<TFn extends AnyFunction> {
   readonly store: Store<Readonly<DebouncerState<TFn>>> = new Store(
     getDefaultDebouncerState<TFn>(),
   )
-  key: string
+  key: string | undefined
   options: DebouncerOptions<TFn>
   #timeoutId: NodeJS.Timeout | undefined
 
@@ -151,7 +151,7 @@ export class Debouncer<TFn extends AnyFunction> {
     public fn: TFn,
     initialOptions: DebouncerOptions<TFn>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -165,11 +165,6 @@ export class Debouncer<TFn extends AnyFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the debouncer instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('Debouncer', this)
-
   /**
    * Updates the debouncer options
    */
diff --git a/packages/pacer/src/event-client.ts b/packages/pacer/src/event-client.ts
index 255ebcd9..9d2b2799 100644
--- a/packages/pacer/src/event-client.ts
+++ b/packages/pacer/src/event-client.ts
@@ -60,7 +60,9 @@ export const emitChange = <
   event: TSuffix,
   payload: PacerEventMap[`pacer:${TSuffix}`],
 ) => {
-  pacerEventClient.emit(event, payload)
+  if (payload.key) {
+    pacerEventClient.emit(event, payload)
+  }
 }
 
 export const pacerEventClient = new PacerEventClient()
diff --git a/packages/pacer/src/queuer.ts b/packages/pacer/src/queuer.ts
index f4cb1425..ed5f0970 100644
--- a/packages/pacer/src/queuer.ts
+++ b/packages/pacer/src/queuer.ts
@@ -1,5 +1,5 @@
 import { Store } from '@tanstack/store'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 
 export interface QueuerState<TValue> {
@@ -270,7 +270,7 @@ export class Queuer<TValue> {
   readonly store: Store<Readonly<QueuerState<TValue>>> = new Store(
     getDefaultQueuerState<TValue>(),
   )
-  key: string
+  key: string | undefined
   options: QueuerOptions<TValue>
   #timeoutId: NodeJS.Timeout | null = null
 
@@ -278,7 +278,7 @@ export class Queuer<TValue> {
     public fn: (item: TValue) => void,
     initialOptions: QueuerOptions<TValue> = {},
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -309,11 +309,6 @@ export class Queuer<TValue> {
     })
   }
 
-  /**
-   * Emits a change event for the queuer instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('Queuer', this)
-
   /**
    * Updates the queuer options. New options are merged with existing options.
    */
diff --git a/packages/pacer/src/rate-limiter.ts b/packages/pacer/src/rate-limiter.ts
index 1a4a2f1c..5e34452d 100644
--- a/packages/pacer/src/rate-limiter.ts
+++ b/packages/pacer/src/rate-limiter.ts
@@ -1,5 +1,5 @@
 import { Store } from '@tanstack/store'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AnyFunction } from './types'
 
@@ -156,7 +156,7 @@ const defaultOptions: Omit<
 export class RateLimiter<TFn extends AnyFunction> {
   readonly store: Store<Readonly<RateLimiterState>> =
     new Store<RateLimiterState>(getDefaultRateLimiterState())
-  key: string
+  key: string | undefined
   options: RateLimiterOptions<TFn>
   #timeoutIds: Set<NodeJS.Timeout> = new Set()
 
@@ -164,7 +164,7 @@ export class RateLimiter<TFn extends AnyFunction> {
     public fn: TFn,
     initialOptions: RateLimiterOptions<TFn>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -181,11 +181,6 @@ export class RateLimiter<TFn extends AnyFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the rate limiter instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('RateLimiter', this)
-
   /**
    * Updates the rate limiter options
    */
diff --git a/packages/pacer/src/throttler.ts b/packages/pacer/src/throttler.ts
index c88ccea0..048bff1d 100644
--- a/packages/pacer/src/throttler.ts
+++ b/packages/pacer/src/throttler.ts
@@ -1,5 +1,5 @@
 import { Store } from '@tanstack/store'
-import { createKey, parseFunctionOrValue } from './utils'
+import { parseFunctionOrValue } from './utils'
 import { emitChange, pacerEventClient } from './event-client'
 import type { AnyFunction } from './types'
 
@@ -159,7 +159,7 @@ export class Throttler<TFn extends AnyFunction> {
     public fn: TFn,
     initialOptions: ThrottlerOptions<TFn>,
   ) {
-    this.key = createKey(initialOptions.key)
+    this.key = initialOptions.key
     this.options = {
       ...defaultOptions,
       ...initialOptions,
@@ -173,11 +173,6 @@ export class Throttler<TFn extends AnyFunction> {
     })
   }
 
-  /**
-   * Emits a change event for the throttler instance. Mostly useful for devtools.
-   */
-  _emit = () => emitChange('Throttler', this)
-
   /**
    * Updates the throttler options
    */
diff --git a/packages/pacer/src/utils.ts b/packages/pacer/src/utils.ts
index ceb8b605..3a510d8e 100644
--- a/packages/pacer/src/utils.ts
+++ b/packages/pacer/src/utils.ts
@@ -10,18 +10,3 @@ export function parseFunctionOrValue<T, TArgs extends Array<any>>(
 ): T {
   return isFunction(value) ? value(...args) : value
 }
-
-export function createKey(key?: string): string {
-  if (key) {
-    return key
-  }
-
-  if (
-    typeof crypto !== 'undefined' &&
-    typeof crypto.randomUUID === 'function'
-  ) {
-    return crypto.randomUUID()
-  }
-
-  return ''
-}