diff --git a/README.md b/README.md
index b23a68b..6beca54 100644
--- a/README.md
+++ b/README.md
@@ -126,12 +126,13 @@ await activitysmith.notifications.send({
 
 ## Live Activities
 
-There are four types of Live Activities:
+There are five types of Live Activities:
 
 - `stats`: best for showing business numbers side by side, such as revenue, sales, new users, conversion, refunds, or any other value you want visible at a glance
 - `metrics`: best for live percentage values that change often, like server CPU, memory usage, disk usage, or error rate
 - `segmented_progress`: best for anything that moves through clear stages, like deployments, onboarding flows, backups, ETL pipelines, migrations, and AI agent runs
 - `progress`: best for tracking real-time progress with percentage, like tasks, backups, migrations, syncs, or uploads
+- `alert`: best for status updates, such as feature adoption, reactivation, onboarding blockers, incidents, escalations, and other operational states
 
 ### Start & Update Live Activity
 
@@ -216,6 +217,32 @@ await activitysmith.liveActivities.stream("search-reindex", {
 });
 ```
 
+#### Alert
+
+<p align="center">
+  <img src="https://cdn.activitysmith.com/features/alert-live-activity.png" alt="Alert Live Activity stream example" width="680" />
+</p>
+
+```ts
+await activitysmith.liveActivities.stream("customer-ops", {
+  content_state: ActivitySmith.contentState({
+    title: "Reactivation",
+    message: "Lumen came back after 2 weeks",
+    type: "alert",
+    icon: ActivitySmith.alertIcon("cloud.sun", { color: "yellow" }),
+    badge: ActivitySmith.alertBadge("Customer", { color: "magenta" }),
+  }),
+});
+```
+
+The `icon.symbol` value is an Apple SF Symbol name. Browse the catalog with one of these tools:
+
+- [ActivitySmith app](https://apps.apple.com/us/app/activitysmith/id6752254835) - Open Settings -> SF Symbols to browse 45 hand-picked icons ready to use
+- [SF Symbols](https://developer.apple.com/sf-symbols/) - Apple's official macOS app
+- [Interactful](https://apps.apple.com/app/interactful/id1528095640) - free third-party iOS app listing all SF Symbols under Foundations -> Iconography
+
+`icon` and `badge` are optional. If you omit either one, that element is not shown in the Live Activity.
+
 ### End Live Activity
 
 Call `endStream(...)` with the same `streamKey` to dismiss the Live Activity. You can include final values before it is removed. By default, iOS removes the Live Activity after two minutes. Set `auto_dismiss_minutes` to choose a different dismissal time, including `0` for immediate dismissal.
@@ -238,6 +265,7 @@ await activitysmith.liveActivities.endStream("prod-web-1", {
 ### Live Activity Action
 
 Live Activities can include one optional action button. Use it to open a URL from the Live Activity or trigger a backend webhook.
+For Alert Live Activities, set `content_state.color` to tint the action button. `icon.color` and `badge.color` only affect the icon and badge.
 
 <p align="center">
   <img src="https://cdn.activitysmith.com/features/live-activity-with-action.png?v=20260319-1" alt="Live Activity with action button" width="680" />
diff --git a/generated/models/index.ts b/generated/models/index.ts
index f3c88e3..fab0751 100644
--- a/generated/models/index.ts
+++ b/generated/models/index.ts
@@ -191,7 +191,7 @@ export interface ContentStateEnd {
      */
     type?: ContentStateEndTypeEnum;
     /**
-     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities.
+     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities. For Alert Live Activities, this tints the action button when action is included.
      * @type {string}
      * @memberof ContentStateEnd
      */
@@ -360,7 +360,7 @@ export interface ContentStateStart {
      */
     type: ContentStateStartTypeEnum;
     /**
-     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities.
+     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities. For Alert Live Activities, this tints the action button when action is included.
      * @type {string}
      * @memberof ContentStateStart
      */
@@ -523,7 +523,7 @@ export interface ContentStateUpdate {
      */
     type?: ContentStateUpdateTypeEnum;
     /**
-     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities.
+     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities. For Alert Live Activities, this tints the action button when action is included.
      * @type {string}
      * @memberof ContentStateUpdate
      */
@@ -676,7 +676,7 @@ export const LiveActivityActionType = {
 export type LiveActivityActionType = typeof LiveActivityActionType[keyof typeof LiveActivityActionType];
 
 /**
- * Optional badge for alert Live Activities.
+ * Optional badge for Alert Live Activities.
  * @export
  * @interface LiveActivityAlertBadge
  */
@@ -696,7 +696,7 @@ export interface LiveActivityAlertBadge {
     color?: LiveActivityColor;
 }
 /**
- * Optional SF Symbol icon for alert Live Activities.
+ * Optional SF Symbol icon for Alert Live Activities.
  * @export
  * @interface LiveActivityAlertIcon
  */
@@ -1541,7 +1541,7 @@ export interface StreamContentState {
      */
     type?: StreamContentStateTypeEnum;
     /**
-     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities.
+     * Optional. Accent color for progress, segmented_progress, and metrics Live Activities. For Alert Live Activities, this tints the action button when action is included.
      * @type {string}
      * @memberof StreamContentState
      */
diff --git a/package-lock.json b/package-lock.json
index 32db8ba..245c273 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "activitysmith",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "activitysmith",
-      "version": "1.3.1",
+      "version": "1.4.0",
       "license": "MIT",
       "devDependencies": {
         "typescript": "^5.3.3",
diff --git a/package.json b/package.json
index 00c57d8..1907b20 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "activitysmith",
-  "version": "1.3.1",
+  "version": "1.4.0",
   "description": "Official ActivitySmith Node.js SDK",
   "keywords": [
     "activitysmith",
diff --git a/src/ActivitySmith.ts b/src/ActivitySmith.ts
index ba31f87..29f3c6e 100644
--- a/src/ActivitySmith.ts
+++ b/src/ActivitySmith.ts
@@ -1,6 +1,6 @@
 import { Configuration, PushNotificationsApi, LiveActivitiesApi, MetricsApi } from "../generated/index";
 
-const SDK_VERSION = "1.3.1";
+const SDK_VERSION = "1.4.0";
 const SDK_HEADER_NAME = "X-ActivitySmith-SDK";
 const SDK_HEADER_VALUE = `node-v${SDK_VERSION}`;
 
@@ -28,18 +28,65 @@ type MetricUpdateOptions = Omit<MetricUpdateRequestBody, "value">;
 type MetricInitOverrides = Parameters<MetricsApi["updateMetricValue"]>[1];
 type ChannelTargetInput = { channels?: string[] };
 type PushSendRequest = PushRequestBody & { channels?: string[] };
-type LiveStartSendRequest = StartRequestBody & { channels?: string[] };
-type LiveStreamSendRequest = StreamRequestBody & { channels?: string[] };
 
 const LiveActivityTypes = {
   segmentedProgress: "segmented_progress",
   progress: "progress",
   metrics: "metrics",
   stats: "stats",
+  alert: "alert",
 } as const;
 
-function withTargetChannels<T extends { target?: ChannelTargetInput }>(
-  request: T & { channels?: string[] },
+export type LiveActivityType = (typeof LiveActivityTypes)[keyof typeof LiveActivityTypes];
+
+export type LiveActivityAlertIcon = {
+  symbol: string;
+  color?: string;
+};
+
+export type LiveActivityAlertBadge = {
+  title: string;
+  color?: string;
+};
+
+export type LiveActivityContentState = Record<string, unknown> & {
+  title?: string;
+  subtitle?: string;
+  type?: LiveActivityType | string;
+  message?: string;
+  icon?: LiveActivityAlertIcon;
+  badge?: LiveActivityAlertBadge;
+  color?: string;
+};
+
+type LiveActivityAlertIconOptions = {
+  color?: string;
+};
+
+type LiveActivityAlertBadgeOptions = {
+  color?: string;
+};
+
+type LiveStartSendRequest = Omit<StartRequestBody, "content_state"> & {
+  content_state: LiveActivityContentState;
+  channels?: string[];
+};
+type LiveUpdateSendRequest = Omit<UpdateRequestBody, "content_state"> & {
+  content_state: LiveActivityContentState;
+};
+type LiveEndSendRequest = Omit<EndRequestBody, "content_state"> & {
+  content_state: LiveActivityContentState;
+};
+type LiveStreamSendRequest = Omit<StreamRequestBody, "content_state"> & {
+  content_state: LiveActivityContentState;
+  channels?: string[];
+};
+type LiveStreamDeleteSendRequest = Omit<StreamDeleteRequestBody, "content_state"> & {
+  content_state?: LiveActivityContentState;
+};
+
+function withTargetChannels<T extends object>(
+  request: T & { target?: ChannelTargetInput; channels?: string[] },
 ): T {
   const channels = request.channels;
   if (!channels || channels.length === 0 || request.target) {
@@ -54,6 +101,30 @@ function withTargetChannels<T extends { target?: ChannelTargetInput }>(
   } as T;
 }
 
+function compactObject<T extends Record<string, unknown>>(value: T): T {
+  return Object.fromEntries(
+    Object.entries(value).filter(([, entryValue]) => entryValue !== undefined),
+  ) as T;
+}
+
+function contentState(value: LiveActivityContentState): LiveActivityContentState {
+  return compactObject(value);
+}
+
+function alertIcon(
+  symbol: string,
+  options: LiveActivityAlertIconOptions = {},
+): LiveActivityAlertIcon {
+  return compactObject({ symbol, color: options.color });
+}
+
+function alertBadge(
+  title: string,
+  options: LiveActivityAlertBadgeOptions = {},
+): LiveActivityAlertBadge {
+  return compactObject({ title, color: options.color });
+}
+
 function hasMediaValue(media: unknown): boolean {
   if (typeof media === "string") {
     return media.trim().length > 0;
@@ -140,24 +211,36 @@ export class LiveActivitiesResource {
 
   start(request: LiveStartSendRequest, initOverrides?: LiveInitOverrides) {
     return this.api.startLiveActivity(
-      { liveActivityStartRequest: withTargetChannels(request) },
+      {
+        liveActivityStartRequest: withTargetChannels<LiveStartSendRequest>(
+          request,
+        ) as StartRequestBody,
+      },
       initOverrides,
     );
   }
 
-  update(request: UpdateRequestBody, initOverrides?: LiveInitOverrides) {
-    return this.api.updateLiveActivity({ liveActivityUpdateRequest: request }, initOverrides);
+  update(request: LiveUpdateSendRequest, initOverrides?: LiveInitOverrides) {
+    return this.api.updateLiveActivity(
+      { liveActivityUpdateRequest: request as UpdateRequestBody },
+      initOverrides,
+    );
   }
 
-  end(request: EndRequestBody, initOverrides?: LiveInitOverrides) {
-    return this.api.endLiveActivity({ liveActivityEndRequest: request }, initOverrides);
+  end(request: LiveEndSendRequest, initOverrides?: LiveInitOverrides) {
+    return this.api.endLiveActivity(
+      { liveActivityEndRequest: request as EndRequestBody },
+      initOverrides,
+    );
   }
 
   stream(streamKey: string, request: LiveStreamSendRequest, initOverrides?: LiveInitOverrides) {
     return this.api.reconcileLiveActivityStream(
       {
         streamKey,
-        liveActivityStreamRequest: withTargetChannels(request),
+        liveActivityStreamRequest: withTargetChannels<LiveStreamSendRequest>(
+          request,
+        ) as StreamRequestBody,
       },
       initOverrides,
     );
@@ -165,12 +248,15 @@ export class LiveActivitiesResource {
 
   endStream(
     streamKey: string,
-    request?: StreamDeleteRequestBody,
+    request?: LiveStreamDeleteSendRequest,
     initOverrides?: LiveInitOverrides,
   ) {
     if (request) {
       return this.api.endLiveActivityStream(
-        { streamKey, liveActivityStreamDeleteRequest: request },
+        {
+          streamKey,
+          liveActivityStreamDeleteRequest: request as StreamDeleteRequestBody,
+        },
         initOverrides,
       );
     }
@@ -259,6 +345,9 @@ export class MetricsResource {
 
 export class ActivitySmith {
   public static readonly liveActivityTypes = LiveActivityTypes;
+  public static readonly contentState = contentState;
+  public static readonly alertIcon = alertIcon;
+  public static readonly alertBadge = alertBadge;
 
   public readonly notifications: NotificationsResource;
   public readonly liveActivities: LiveActivitiesResource;
diff --git a/tests/resources.test.js b/tests/resources.test.js
index 26c0388..505e040 100644
--- a/tests/resources.test.js
+++ b/tests/resources.test.js
@@ -255,6 +255,46 @@ describe("resource wrappers", () => {
     expect(startSpy).toHaveBeenCalledWith({ liveActivityStartRequest: payload }, undefined);
   });
 
+  it("passes through alert content_state with icon and badge colors", async () => {
+    const ActivitySmith = require("../dist/src/index.js");
+    const generated = require("../dist/generated/index.js");
+
+    const streamSpy = vi
+      .spyOn(generated.LiveActivitiesApi.prototype, "reconcileLiveActivityStream")
+      .mockResolvedValue({ operation: "started", stream_key: "customer-ops" });
+
+    const client = new ActivitySmith({ apiKey: "test" });
+    const payload = {
+      content_state: ActivitySmith.contentState({
+        title: "Reactivation",
+        message: "Lumen came back after 2 weeks",
+        type: ActivitySmith.liveActivityTypes.alert,
+        color: "red",
+        icon: ActivitySmith.alertIcon("cloud.sun", { color: "yellow" }),
+        badge: ActivitySmith.alertBadge("Customer", { color: "magenta" }),
+      }),
+    };
+
+    await client.liveActivities.stream("customer-ops", payload);
+
+    expect(streamSpy).toHaveBeenCalledWith(
+      {
+        streamKey: "customer-ops",
+        liveActivityStreamRequest: {
+          content_state: {
+            title: "Reactivation",
+            message: "Lumen came back after 2 weeks",
+            type: ActivitySmith.liveActivityTypes.alert,
+            color: "red",
+            icon: { symbol: "cloud.sun", color: "yellow" },
+            badge: { title: "Customer", color: "magenta" },
+          },
+        },
+      },
+      undefined,
+    );
+  });
+
   it("wraps live activity stream payloads for short methods", async () => {
     const ActivitySmith = require("../dist/src/index.js");
     const generated = require("../dist/generated/index.js");