diff --git a/src/client/base.ts b/src/client/base.ts
index 00d2b65..9c93870 100644
--- a/src/client/base.ts
+++ b/src/client/base.ts
@@ -2,7 +2,7 @@ import { join } from 'node:path';
 import { ApiHandler, Router } from '../api';
 import type { Adapter } from '../cache';
 import { Cache, MemoryAdapter } from '../cache';
-import type { RegisteredMiddlewares } from '../commands';
+import type { Command, ContextMenuCommand, RegisteredMiddlewares } from '../commands';
 import type { InferWithPrefix, MiddlewareContext } from '../commands/applications/shared';
 import { CommandHandler, type CommandHandlerLike } from '../commands/handler';
 import {
@@ -25,6 +25,7 @@ import {
 } from '../common';
 
 import type { DeepPartial, IntentStrings, OmitInsert, When } from '../common/types/util';
+import type { ComponentCommand, ModalCommand } from '../components';
 import { ComponentHandler, type ComponentHandlerLike } from '../components/handler';
 import { LangsHandler, type LangsHandlerLike } from '../langs/handler';
 import type {
@@ -116,13 +117,34 @@ export class BaseClient {
 		}
 		if (handlers) {
 			if ('components' in handlers) {
-				this.components = handlers.components;
+				if (!handlers.components) {
+					this.components = undefined;
+				} else if (typeof handlers.components === 'function') {
+					this.components = new ComponentHandler(this.logger, this);
+					(this.components as ComponentHandler).__callback = handlers.components;
+				} else {
+					this.components = handlers.components;
+				}
 			}
 			if ('commands' in handlers) {
-				this.commands = handlers.commands;
+				if (!handlers.commands) {
+					this.commands = undefined;
+				} else if (typeof handlers.commands === 'function') {
+					this.commands = new CommandHandler(this.logger, this);
+					(this.commands as CommandHandler).__callback = handlers.commands;
+				} else {
+					this.commands = handlers.commands;
+				}
 			}
 			if ('langs' in handlers) {
-				this.langs = handlers.langs;
+				if (!handlers.langs) {
+					this.langs = undefined;
+				} else if (typeof handlers.langs === 'function') {
+					this.langs = new LangsHandler(this.logger);
+					(this.langs as LangsHandler).__callback = handlers.langs;
+				} else {
+					this.langs = handlers.langs;
+				}
 			}
 		}
 		if (langs) {
@@ -322,8 +344,8 @@ export interface ServicesOptions {
 	};
 	middlewares?: Record<string, MiddlewareContext>;
 	handlers?: {
-		components?: ComponentHandlerLike;
-		commands?: CommandHandlerLike;
-		langs?: LangsHandlerLike;
+		components?: ComponentHandlerLike | ((component: ComponentCommand | ModalCommand) => void);
+		commands?: CommandHandlerLike | ((command: Command | ContextMenuCommand) => void);
+		langs?: LangsHandlerLike | ((locale: string, record: Record<string, unknown>) => void);
 	};
 }
diff --git a/src/client/client.ts b/src/client/client.ts
index 1903cb9..bc02346 100644
--- a/src/client/client.ts
+++ b/src/client/client.ts
@@ -1,5 +1,5 @@
 import { parentPort, workerData } from 'node:worker_threads';
-import type { Command, CommandContext, EventHandlerLike, Message, SubCommand } from '..';
+import type { ClientEvent, Command, CommandContext, EventHandlerLike, Message, SubCommand } from '..';
 import {
 	GatewayIntentBits,
 	type DeepPartial,
@@ -38,7 +38,7 @@ export class Client<Ready extends boolean = boolean> extends BaseClient {
 	}: ServicesOptions & {
 		gateway?: ShardManager;
 		handlers?: ServicesOptions['handlers'] & {
-			events?: EventHandlerLike;
+			events?: EventHandlerLike | ((event: ClientEvent) => any);
 		};
 	}) {
 		super.setServices(rest);
@@ -52,7 +52,14 @@ export class Client<Ready extends boolean = boolean> extends BaseClient {
 			this.gateway = gateway;
 		}
 		if (rest.handlers && 'events' in rest.handlers) {
-			this.events = rest.handlers.events;
+			if (!rest.handlers.events) {
+				this.events = undefined;
+			} else if (typeof rest.handlers.events === 'function') {
+				this.events = new EventHandler(this.logger);
+				(this.events as EventHandler).__callback = rest.handlers.events;
+			} else {
+				this.events = rest.handlers.events;
+			}
 		}
 	}
 
diff --git a/src/commands/handler.ts b/src/commands/handler.ts
index 3e5e87b..ee1c1df 100644
--- a/src/commands/handler.ts
+++ b/src/commands/handler.ts
@@ -69,6 +69,7 @@ export class CommandHandler extends BaseHandler {
 			if (commandInstance instanceof ContextMenuCommand) {
 				this.values.push(commandInstance);
 				commandInstance.__filePath = command.path;
+				await this.__callback?.(commandInstance);
 				continue;
 			}
 			if (!(commandInstance instanceof Command)) {
@@ -120,6 +121,8 @@ export class CommandHandler extends BaseHandler {
 					this.__parseCommandLocales(i, client);
 				}
 			}
+
+			await this.__callback?.(commandInstance);
 		}
 
 		return this.values;
diff --git a/src/common/it/utils.ts b/src/common/it/utils.ts
index ab526f0..f32cb5a 100644
--- a/src/common/it/utils.ts
+++ b/src/common/it/utils.ts
@@ -94,6 +94,7 @@ export function filterSplit<Element, Predicate extends (value: Element) => boole
  * Represents a base handler class.
  */
 export class BaseHandler {
+	__callback?: (...args: any[]) => any;
 	/**
 	 * Initializes a new instance of the BaseHandler class.
 	 * @param logger The logger instance.
diff --git a/src/components/handler.ts b/src/components/handler.ts
index 3e694ab..f30fb60 100644
--- a/src/components/handler.ts
+++ b/src/components/handler.ts
@@ -184,6 +184,7 @@ export class ComponentHandler extends BaseHandler {
 			if (!(component instanceof ModalCommand) && !(component instanceof ComponentCommand)) continue;
 			component.__filePath = paths[i].path;
 			this.commands.push(component);
+			await this.__callback?.(component);
 		}
 	}
 
diff --git a/src/events/handler.ts b/src/events/handler.ts
index 7b78500..13e606c 100644
--- a/src/events/handler.ts
+++ b/src/events/handler.ts
@@ -50,6 +50,7 @@ export class EventHandler extends BaseHandler {
 			}
 			instance.__filePath = i.path;
 			this.values[ReplaceRegex.snake(instance.data.name).toUpperCase() as GatewayEvents] = instance as EventValue;
+			await this.__callback?.(instance);
 		}
 	}
 
diff --git a/src/langs/handler.ts b/src/langs/handler.ts
index 2621f69..aba1432 100644
--- a/src/langs/handler.ts
+++ b/src/langs/handler.ts
@@ -49,6 +49,7 @@ export class LangsHandler extends BaseHandler {
 		for (const i of files) {
 			const locale = i.name.split('.').slice(0, -1).join('.');
 			this.values[locale] = i.file;
+			await this.__callback?.(locale, i.file);
 		}
 	}
 }