feat(hooks): adds support for RuntimeHook functions. (#19598)

packages/core/src/hooks/hookSystem.ts

@@ -21,6 +21,9 @@ import type {
   AfterModelHookOutput,
   BeforeToolSelectionHookOutput,
   McpToolContext,
+  HookConfig,
+  HookEventName,
+  ConfigSource,
 } from './types.js';
 import { NotificationType } from './types.js';
 import type { AggregatedHookResult } from './hookAggregator.js';
@@ -202,6 +205,17 @@ export class HookSystem {
     return this.hookRegistry.getAllHooks();
   }
 
+  /**
+   * Register a new hook programmatically
+   */
+  registerHook(
+    config: HookConfig,
+    eventName: HookEventName,
+    options?: { matcher?: string; sequential?: boolean; source?: ConfigSource },
+  ): void {
+    this.hookRegistry.registerHook(config, eventName, options);
+  }
+
   /**
    * Fire hook events directly
    */