diff --git a/packages/core/src/domain/configuration/configuration.spec.ts b/packages/core/src/domain/configuration/configuration.spec.ts
index 5a3653006c..55d5579815 100644
--- a/packages/core/src/domain/configuration/configuration.spec.ts
+++ b/packages/core/src/domain/configuration/configuration.spec.ts
@@ -1,4 +1,6 @@
 import type { RumEvent } from '../../../../rum-core/src'
+import { EXHAUSTIVE_INIT_CONFIGURATION, SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION } from '../../../test'
+import type { ExtractTelemetryConfiguration, MapInitConfigurationKey } from '../../../test'
 import { display } from '../../tools/display'
 import {
   ExperimentalFeature,
@@ -7,7 +9,7 @@ import {
 } from '../../tools/experimentalFeatures'
 import { TrackingConsent } from '../trackingConsent'
 import type { InitConfiguration } from './configuration'
-import { validateAndBuildConfiguration } from './configuration'
+import { serializeConfiguration, validateAndBuildConfiguration } from './configuration'
 
 describe('validateAndBuildConfiguration', () => {
   const clientToken = 'some_client_token'
@@ -207,4 +209,15 @@ describe('validateAndBuildConfiguration', () => {
       expect(displaySpy).toHaveBeenCalledOnceWith('Tracking Consent should be either "granted" or "not-granted"')
     })
   })
+
+  describe('serializeConfiguration', () => {
+    it('should serialize the configuration', () => {
+      // By specifying the type here, we can ensure that serializeConfiguration is returning an
+      // object containing all expected properties.
+      const serializedConfiguration: ExtractTelemetryConfiguration<MapInitConfigurationKey<keyof InitConfiguration>> =
+        serializeConfiguration(EXHAUSTIVE_INIT_CONFIGURATION)
+
+      expect(serializedConfiguration).toEqual(SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION)
+    })
+  })
 })
diff --git a/packages/core/src/domain/configuration/configuration.ts b/packages/core/src/domain/configuration/configuration.ts
index bd2f7b6dae..fa14c8ff6d 100644
--- a/packages/core/src/domain/configuration/configuration.ts
+++ b/packages/core/src/domain/configuration/configuration.ts
@@ -178,7 +178,7 @@ export function validateAndBuildConfiguration(initConfiguration: InitConfigurati
   )
 }
 
-export function serializeConfiguration(initConfiguration: InitConfiguration): Partial<RawTelemetryConfiguration> {
+export function serializeConfiguration(initConfiguration: InitConfiguration) {
   return {
     session_sample_rate: initConfiguration.sessionSampleRate,
     telemetry_sample_rate: initConfiguration.telemetrySampleRate,
@@ -193,5 +193,6 @@ export function serializeConfiguration(initConfiguration: InitConfiguration): Pa
     allow_fallback_to_local_storage: !!initConfiguration.allowFallbackToLocalStorage,
     store_contexts_across_pages: !!initConfiguration.storeContextsAcrossPages,
     allow_untrusted_events: !!initConfiguration.allowUntrustedEvents,
-  }
+    tracking_consent: initConfiguration.trackingConsent,
+  } satisfies RawTelemetryConfiguration
 }
diff --git a/packages/core/src/domain/telemetry/telemetryEvent.types.ts b/packages/core/src/domain/telemetry/telemetryEvent.types.ts
index 22ddf7884e..cabd91f99a 100644
--- a/packages/core/src/domain/telemetry/telemetryEvent.types.ts
+++ b/packages/core/src/domain/telemetry/telemetryEvent.types.ts
@@ -113,6 +113,10 @@ export type TelemetryConfigurationEvent = CommonTelemetryProperties & {
        * The percentage of sessions with RUM & Session Replay pricing tracked
        */
       session_replay_sample_rate?: number
+      /**
+       * The initial tracking consent value
+       */
+      tracking_consent?: string
       /**
        * Whether the session replay start is handled manually
        */
@@ -193,6 +197,10 @@ export type TelemetryConfigurationEvent = CommonTelemetryProperties & {
        * Whether the Worker is loaded from an external URL
        */
       use_worker_url?: boolean
+      /**
+       * Whether intake requests are compressed
+       */
+      compress_intake_requests?: boolean
       /**
        * Whether user frustrations are tracked
        */
@@ -309,6 +317,14 @@ export type TelemetryConfigurationEvent = CommonTelemetryProperties & {
        * The version of Dart used in a Flutter application
        */
       dart_version?: string
+      /**
+       * The version of Unity used in a Unity application
+       */
+      unity_version?: string
+      /**
+       * The threshold used for iOS App Hangs monitoring (in milliseconds)
+       */
+      app_hang_threshold?: number
       [k: string]: unknown
     }
     [k: string]: unknown
diff --git a/packages/core/test/coreConfiguration.ts b/packages/core/test/coreConfiguration.ts
new file mode 100644
index 0000000000..9c32befc3f
--- /dev/null
+++ b/packages/core/test/coreConfiguration.ts
@@ -0,0 +1,100 @@
+import type { InitConfiguration } from '../src/domain/configuration'
+import type { RawTelemetryConfiguration } from '../src/domain/telemetry'
+import type { CamelToSnakeCase, RemoveIndex } from './typeUtils'
+
+// Defines a few constants and types related to the core package configuration, so it can be used in
+// other packages tests.
+
+/**
+ * An object containing every single possible configuration initialization parameters, with
+ * arbitrary values.
+ */
+export const EXHAUSTIVE_INIT_CONFIGURATION: Required<InitConfiguration> = {
+  clientToken: 'yes',
+  beforeSend: () => true,
+  sessionSampleRate: 50,
+  telemetrySampleRate: 60,
+  silentMultipleInit: true,
+  allowFallbackToLocalStorage: true,
+  allowUntrustedEvents: true,
+  storeContextsAcrossPages: true,
+  trackingConsent: 'not-granted',
+  proxy: 'proxy',
+  site: 'site',
+  service: 'service',
+  env: 'env',
+  version: 'version',
+  useCrossSiteSessionCookie: true,
+  usePartitionedCrossSiteSessionCookie: true,
+  useSecureSessionCookie: true,
+  trackSessionAcrossSubdomains: true,
+  enableExperimentalFeatures: ['foo'],
+  replica: {
+    clientToken: 'yes',
+  },
+  datacenter: 'datacenter',
+  internalAnalyticsSubdomain: 'internal-analytics-subdomain.com',
+  telemetryConfigurationSampleRate: 70,
+}
+
+export const SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION = {
+  session_sample_rate: 50,
+  telemetry_sample_rate: 60,
+  telemetry_configuration_sample_rate: 70,
+  use_before_send: true,
+  use_cross_site_session_cookie: true,
+  use_partitioned_cross_site_session_cookie: true,
+  use_secure_session_cookie: true,
+  use_proxy: true,
+  silent_multiple_init: true,
+  track_session_across_subdomains: true,
+  allow_fallback_to_local_storage: true,
+  store_contexts_across_pages: true,
+  allow_untrusted_events: true,
+  tracking_consent: 'not-granted',
+}
+
+/**
+ * Maps the keys of InitConfiguration to their serialized version.
+ */
+export type MapInitConfigurationKey<Key extends string> =
+  // Some keys are prefixed with `use_` to indicate that they are boolean flags
+  Key extends 'proxy' | 'beforeSend'
+    ? `use_${CamelToSnakeCase<Key>}`
+    : // Those keys should not be serialized
+      Key extends
+          | 'site'
+          | 'service'
+          | 'clientToken'
+          | 'env'
+          | 'version'
+          | 'datacenter'
+          | 'internalAnalyticsSubdomain'
+          | 'replica'
+          | 'enableExperimentalFeatures'
+      ? never
+      : // Other keys are simply snake cased
+        CamelToSnakeCase<Key>
+
+/**
+ * Extracts a sub-set of RawTelemetryConfiguration from the passed InitConfiguration keys, with all
+ * properties required, to make sure they are all defined.
+ *
+ * This type is only used in tests because "template literal types" were introduced in (TS 4.1)[1] and we
+ * still support TS 3.8.2.
+ *
+ * [1]: https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-1.html#template-literal-types
+ *
+ * @example
+ * type SerializedInitConfiguration = ExtractTelemetryConfiguration<
+ *   "session_sample_rate" | "track_user_interactions"
+ * >
+ * // equivalent to:
+ * // type SerializedInitConfiguration = {
+ * //   session_sample_rate: number | undefined;
+ * //   track_user_interactions: boolean | undefined;
+ * // }
+ */
+export type ExtractTelemetryConfiguration<Keys extends keyof RemoveIndex<RawTelemetryConfiguration>> = {
+  [Key in Keys]: RawTelemetryConfiguration[Key]
+}
diff --git a/packages/core/test/index.ts b/packages/core/test/index.ts
index e57b8fbc38..c1ad3e201b 100644
--- a/packages/core/test/index.ts
+++ b/packages/core/test/index.ts
@@ -15,3 +15,5 @@ export * from './emulate/eventBridge'
 export * from './emulate/stubStorages'
 export * from './emulate/mockFlushController'
 export * from './emulate/mockExperimentalFeatures'
+export * from './typeUtils'
+export * from './coreConfiguration'
diff --git a/packages/core/test/typeUtils.ts b/packages/core/test/typeUtils.ts
new file mode 100644
index 0000000000..40fcb26a34
--- /dev/null
+++ b/packages/core/test/typeUtils.ts
@@ -0,0 +1,18 @@
+/**
+ * Remove the index signature from an object type
+ * @example
+ * type Foo = { a: string, b: number, [key: string]: any }
+ * type Bar = RemoveIndex<Foo> // { a: string, b: number }
+ */
+export type RemoveIndex<T> = {
+  [K in keyof T as string extends K ? never : number extends K ? never : symbol extends K ? never : K]: T[K]
+}
+
+/**
+ * Turn a camel case string into a snake case string
+ * @example
+ * type Foo = CamelToSnakeCase<'fooBarBaz'> // 'foo_bar_baz'
+ */
+export type CamelToSnakeCase<S extends string> = S extends `${infer T}${infer U}`
+  ? `${T extends Capitalize<T> ? '_' : ''}${Lowercase<T>}${CamelToSnakeCase<U>}`
+  : S
diff --git a/packages/logs/src/domain/configuration.spec.ts b/packages/logs/src/domain/configuration.spec.ts
index f10b709073..557b0240cf 100644
--- a/packages/logs/src/domain/configuration.spec.ts
+++ b/packages/logs/src/domain/configuration.spec.ts
@@ -1,5 +1,18 @@
+import type { InitConfiguration } from '@datadog/browser-core'
 import { display } from '@datadog/browser-core'
-import { validateAndBuildForwardOption, validateAndBuildLogsConfiguration } from './configuration'
+import {
+  EXHAUSTIVE_INIT_CONFIGURATION,
+  type CamelToSnakeCase,
+  type ExtractTelemetryConfiguration,
+  type MapInitConfigurationKey,
+  SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION,
+} from '../../../core/test'
+import type { LogsInitConfiguration } from './configuration'
+import {
+  serializeLogsConfiguration,
+  validateAndBuildForwardOption,
+  validateAndBuildLogsConfiguration,
+} from './configuration'
 
 const DEFAULT_INIT_CONFIGURATION = { clientToken: 'xxx' }
 
@@ -97,3 +110,32 @@ describe('validateAndBuildForwardOption', () => {
     expect(validateAndBuildForwardOption('all', allowedValues, label)).toEqual(allowedValues)
   })
 })
+
+describe('serializeLogsConfiguration', () => {
+  it('should serialize the configuration', () => {
+    const exhaustiveLogsInitConfiguration: Required<LogsInitConfiguration> = {
+      ...EXHAUSTIVE_INIT_CONFIGURATION,
+      beforeSend: () => true,
+      forwardErrorsToLogs: true,
+      forwardConsoleLogs: 'all',
+      forwardReports: 'all',
+    }
+
+    type MapLogsInitConfigurationKey<Key extends string> = Key extends keyof InitConfiguration
+      ? MapInitConfigurationKey<Key>
+      : CamelToSnakeCase<Key>
+
+    // By specifying the type here, we can ensure that serializeConfiguration is returning an
+    // object containing all expected properties.
+    const serializedConfiguration: ExtractTelemetryConfiguration<
+      MapLogsInitConfigurationKey<keyof LogsInitConfiguration>
+    > = serializeLogsConfiguration(exhaustiveLogsInitConfiguration)
+
+    expect(serializedConfiguration).toEqual({
+      ...SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION,
+      forward_errors_to_logs: true,
+      forward_console_logs: 'all',
+      forward_reports: 'all',
+    })
+  })
+})
diff --git a/packages/logs/src/domain/configuration.ts b/packages/logs/src/domain/configuration.ts
index f2c8959f71..6e49ac7b7f 100644
--- a/packages/logs/src/domain/configuration.ts
+++ b/packages/logs/src/domain/configuration.ts
@@ -87,7 +87,7 @@ export function validateAndBuildForwardOption<T>(
   return option === 'all' ? allowedValues : removeDuplicates<T>(option)
 }
 
-export function serializeLogsConfiguration(configuration: LogsInitConfiguration): RawTelemetryConfiguration {
+export function serializeLogsConfiguration(configuration: LogsInitConfiguration) {
   const baseSerializedInitConfiguration = serializeConfiguration(configuration)
 
   return assign(
@@ -97,5 +97,5 @@ export function serializeLogsConfiguration(configuration: LogsInitConfiguration)
       forward_reports: configuration.forwardReports,
     },
     baseSerializedInitConfiguration
-  )
+  ) satisfies RawTelemetryConfiguration
 }
diff --git a/packages/rum-core/src/domain/configuration.spec.ts b/packages/rum-core/src/domain/configuration.spec.ts
index 1c0453dae1..55f462a0d4 100644
--- a/packages/rum-core/src/domain/configuration.spec.ts
+++ b/packages/rum-core/src/domain/configuration.spec.ts
@@ -1,4 +1,7 @@
+import type { InitConfiguration } from '@datadog/browser-core'
 import { DefaultPrivacyLevel, display } from '@datadog/browser-core'
+import { EXHAUSTIVE_INIT_CONFIGURATION, SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION } from '../../../core/test'
+import type { ExtractTelemetryConfiguration, CamelToSnakeCase, MapInitConfigurationKey } from '../../../core/test'
 import type { RumInitConfiguration } from './configuration'
 import { DEFAULT_PROPAGATOR_TYPES, serializeRumConfiguration, validateAndBuildRumConfiguration } from './configuration'
 
@@ -394,3 +397,61 @@ describe('validateAndBuildRumConfiguration', () => {
     })
   })
 })
+
+describe('serializeRumConfiguration', () => {
+  it('should serialize the configuration', () => {
+    const exhaustiveRumInitConfiguration: Required<RumInitConfiguration> = {
+      ...EXHAUSTIVE_INIT_CONFIGURATION,
+      applicationId: 'applicationId',
+      beforeSend: () => true,
+      excludedActivityUrls: ['toto.com'],
+      workerUrl: './worker.js',
+      compressIntakeRequests: true,
+      allowedTracingUrls: ['foo'],
+      traceSampleRate: 50,
+      defaultPrivacyLevel: 'allow',
+      subdomain: 'foo',
+      sessionReplaySampleRate: 60,
+      startSessionReplayRecordingManually: true,
+      trackUserInteractions: true,
+      actionNameAttribute: 'test-id',
+      trackViewsManually: true,
+      trackResources: true,
+      trackLongTasks: true,
+    }
+
+    type MapRumInitConfigurationKey<Key extends string> = Key extends keyof InitConfiguration
+      ? MapInitConfigurationKey<Key>
+      : Key extends 'workerUrl' | 'allowedTracingUrls' | 'excludedActivityUrls'
+        ? `use_${CamelToSnakeCase<Key>}`
+        : Key extends 'trackLongTasks'
+          ? 'track_long_task' // oops
+          : Key extends 'applicationId' | 'subdomain'
+            ? never
+            : CamelToSnakeCase<Key>
+
+    // By specifying the type here, we can ensure that serializeConfiguration is returning an
+    // object containing all expected properties.
+    const serializedConfiguration: ExtractTelemetryConfiguration<
+      MapRumInitConfigurationKey<keyof RumInitConfiguration> | 'selected_tracing_propagators'
+    > = serializeRumConfiguration(exhaustiveRumInitConfiguration)
+
+    expect(serializedConfiguration).toEqual({
+      ...SERIALIZED_EXHAUSTIVE_INIT_CONFIGURATION,
+      session_replay_sample_rate: 60,
+      trace_sample_rate: 50,
+      use_allowed_tracing_urls: true,
+      selected_tracing_propagators: ['tracecontext', 'datadog'],
+      use_excluded_activity_urls: true,
+      track_user_interactions: true,
+      track_views_manually: true,
+      start_session_replay_recording_manually: true,
+      action_name_attribute: 'test-id',
+      default_privacy_level: 'allow',
+      track_resources: true,
+      track_long_task: true,
+      use_worker_url: true,
+      compress_intake_requests: true,
+    })
+  })
+})
diff --git a/packages/rum-core/src/domain/configuration.ts b/packages/rum-core/src/domain/configuration.ts
index a432f6d8fb..6048053d1b 100644
--- a/packages/rum-core/src/domain/configuration.ts
+++ b/packages/rum-core/src/domain/configuration.ts
@@ -186,7 +186,7 @@ function getSelectedTracingPropagators(configuration: RumInitConfiguration): Pro
   return arrayFrom(usedTracingPropagators)
 }
 
-export function serializeRumConfiguration(configuration: RumInitConfiguration): RawTelemetryConfiguration {
+export function serializeRumConfiguration(configuration: RumInitConfiguration) {
   const baseSerializedConfiguration = serializeConfiguration(configuration)
 
   return assign(
@@ -209,5 +209,5 @@ export function serializeRumConfiguration(configuration: RumInitConfiguration):
       track_long_task: configuration.trackLongTasks,
     },
     baseSerializedConfiguration
-  )
+  ) satisfies RawTelemetryConfiguration
 }
diff --git a/packages/rum-core/src/rumEvent.types.ts b/packages/rum-core/src/rumEvent.types.ts
index 41079c0ba3..cada08399e 100644
--- a/packages/rum-core/src/rumEvent.types.ts
+++ b/packages/rum-core/src/rumEvent.types.ts
@@ -220,6 +220,10 @@ export type RumErrorEvent = CommonProperties &
        * The type of the error
        */
       readonly type?: string
+      /**
+       * The specific category of the error. It provides a high-level grouping for different types of errors.
+       */
+      readonly category?: 'ANR' | 'App Hang' | 'Exception'
       /**
        * Whether the error has been handled manually in the source code or not
        */
@@ -383,6 +387,16 @@ export type RumErrorEvent = CommonProperties &
       }
       [k: string]: unknown
     }
+    /**
+     * Properties of App Hang and ANR errors
+     */
+    readonly freeze?: {
+      /**
+       * Duration of the main thread freeze (in ns)
+       */
+      readonly duration: number
+      [k: string]: unknown
+    }
     /**
      * View properties
      */
diff --git a/rum-events-format b/rum-events-format
index 810811b623..e76a333d8d 160000
--- a/rum-events-format
+++ b/rum-events-format
@@ -1 +1 @@
-Subproject commit 810811b623d65dea647ca1d634567c0265778d06
+Subproject commit e76a333d8d2f4841e73116c32ad396e806889053