diff --git a/package-lock.json b/package-lock.json
index ff0d34f..f7d8ffa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.2.4",
       "license": "MIT",
       "dependencies": {
-        "@elgato/streamdeck": "2.1.2"
+        "@elgato/streamdeck": "3.0.0"
       },
       "devDependencies": {
         "@elgato/cli": "1.10.0",
@@ -57,26 +57,19 @@
         "node": ">=20.1.0"
       }
     },
-    "node_modules/@elgato/cli/node_modules/@elgato/schemas": {
+    "node_modules/@elgato/schemas": {
       "version": "0.5.0",
       "resolved": "https://registry.npmjs.org/@elgato/schemas/-/schemas-0.5.0.tgz",
       "integrity": "sha512-Mltoh5L8M7cQuLIlDAsBq4IfdPrt0KMcwKCpl75OcgqILti7XBb/DlgxtULSnze/RXrH4iiwMbKdmMYeKn4RaQ==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/@elgato/schemas": {
-      "version": "0.4.15",
-      "resolved": "https://registry.npmjs.org/@elgato/schemas/-/schemas-0.4.15.tgz",
-      "integrity": "sha512-UpELAqazf52PFer+hqg/hvEhYoPHCH3R0af6P7Ih3Hk6xCCJENn7cA5TIpXAIGEWe6dIteHuo/e/iPGLUP7yXA==",
       "license": "MIT"
     },
     "node_modules/@elgato/streamdeck": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/@elgato/streamdeck/-/streamdeck-2.1.2.tgz",
-      "integrity": "sha512-qj6NuDyYj8bE+XFnr+O5ynB1zojwugfWiK3oQYwweaOzOFs7fEE21v9z75EPC8wQr3cuuzI7m557TQLn5k/4mA==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/@elgato/streamdeck/-/streamdeck-3.0.0.tgz",
+      "integrity": "sha512-Y7vfZH8YB442+iYleey/lNF4WRY8y5OKlY3e0FxKlDDl9Ztc9NLSwiwIy6PZRK87NrJVeq7IXoFxH6PkcZQLkA==",
       "license": "MIT",
       "dependencies": {
-        "@elgato/schemas": "^0.4.14",
+        "@elgato/schemas": "^0.5.0",
         "@elgato/utils": "0.6.0",
         "ws": "^8.19.0"
       },
diff --git a/package.json b/package.json
index 41d3587..e1ec96e 100644
--- a/package.json
+++ b/package.json
@@ -75,7 +75,7 @@
     "test:fast": "vitest run --project unit"
   },
   "dependencies": {
-    "@elgato/streamdeck": "2.1.2"
+    "@elgato/streamdeck": "3.0.0"
   },
   "devDependencies": {
     "@elgato/cli": "1.10.0",
diff --git a/src/actions/agent-navigator.ts b/src/actions/agent-navigator.ts
index 99c76de..e3ed84a 100644
--- a/src/actions/agent-navigator.ts
+++ b/src/actions/agent-navigator.ts
@@ -10,6 +10,7 @@ import { openNewChat, openThread } from "../lib/automation.js";
 import { codexStore } from "../lib/codex-store.js";
 import { statusIndicator } from "../lib/visuals.js";
 import { renderFeedback } from "../lib/render-cache.js";
+import { showActionAlert } from "../lib/streamdeck-alert.js";
 
 type NavigatorSettings = {
   index?: number;
@@ -70,7 +71,7 @@ export class AgentNavigatorAction extends SingletonAction<NavigatorSettings> {
       }
       if (actionInstance.isDial()) await this.draw(actionInstance);
     } catch {
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
     }
   }
 
diff --git a/src/actions/agent-status.ts b/src/actions/agent-status.ts
index 20fbcbe..79fb8da 100644
--- a/src/actions/agent-status.ts
+++ b/src/actions/agent-status.ts
@@ -59,8 +59,7 @@ export class AgentStatusAction extends SingletonAction<AgentSettings> {
     receivedSettings?: AgentSettings,
   ): Promise<void> {
     if (!actionInstance.isKey()) return;
-    const settings =
-      receivedSettings ?? (await actionInstance.getSettings<AgentSettings>());
+    const settings = receivedSettings ?? (await actionInstance.getSettings());
     const slot = this.slotFrom(
       settings,
       (actionInstance.coordinates?.column ?? 0) + 1,
diff --git a/src/actions/command.ts b/src/actions/command.ts
index ff77b0c..9619191 100644
--- a/src/actions/command.ts
+++ b/src/actions/command.ts
@@ -31,6 +31,7 @@ import {
 import { codexStore } from "../lib/codex-store.js";
 import { pickerFailureLabel } from "../lib/codex-ui-control.js";
 import { renderFeedback, renderKey } from "../lib/render-cache.js";
+import { showActionAlert } from "../lib/streamdeck-alert.js";
 
 type CommandSettings = {
   commandId?: string;
@@ -179,7 +180,7 @@ export class CommandAction extends SingletonAction<CommandSettings> {
           title: pickerFailureLabel(error),
         });
       }
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
     }
   }
 
diff --git a/src/actions/context.ts b/src/actions/context.ts
index 0ba39b9..ae2a710 100644
--- a/src/actions/context.ts
+++ b/src/actions/context.ts
@@ -10,17 +10,19 @@ import { toggleContextView, type ContextView } from "../lib/context.js";
 import { contextKeySvg, svgDataUrl } from "../lib/visuals.js";
 import { renderKey } from "../lib/render-cache.js";
 
+type ContextSettings = Record<string, never>;
+
 @action({ UUID: "com.todd.streamdeckcodex.context" })
-export class ContextAction extends SingletonAction {
+export class ContextAction extends SingletonAction<ContextSettings> {
   readonly #mode = new Map<string, ContextView>();
 
-  async onWillAppear(event: WillAppearEvent): Promise<void> {
+  async onWillAppear(event: WillAppearEvent<ContextSettings>): Promise<void> {
     if (!event.action.isKey()) return;
     this.#mode.set(event.action.id, "remaining");
     await this.draw(event.action);
   }
 
-  async onKeyDown(event: KeyDownEvent): Promise<void> {
+  async onKeyDown(event: KeyDownEvent<ContextSettings>): Promise<void> {
     const current = this.#mode.get(event.action.id) ?? "remaining";
     this.#mode.set(event.action.id, toggleContextView(current));
     await this.draw(event.action);
@@ -34,7 +36,7 @@ export class ContextAction extends SingletonAction {
     );
   }
 
-  private async draw(actionInstance: Action): Promise<void> {
+  private async draw(actionInstance: Action<ContextSettings>): Promise<void> {
     if (!actionInstance.isKey()) return;
     await renderKey(
       actionInstance,
diff --git a/src/actions/health.ts b/src/actions/health.ts
index d7a0a55..072a3b3 100644
--- a/src/actions/health.ts
+++ b/src/actions/health.ts
@@ -15,17 +15,19 @@ import {
 import { renderKey } from "../lib/render-cache.js";
 import { healthKeySvg, svgDataUrl } from "../lib/visuals.js";
 
+type HealthSettings = Record<string, never>;
+
 @action({ UUID: "com.todd.streamdeckcodex.health" })
-export class HealthAction extends SingletonAction {
+export class HealthAction extends SingletonAction<HealthSettings> {
   readonly #selection = new Map<string, number>();
 
-  async onWillAppear(event: WillAppearEvent): Promise<void> {
+  async onWillAppear(event: WillAppearEvent<HealthSettings>): Promise<void> {
     if (!event.action.isKey()) return;
     this.#selection.set(event.action.id, 0);
     await this.draw(event.action);
   }
 
-  async onKeyDown(event: KeyDownEvent): Promise<void> {
+  async onKeyDown(event: KeyDownEvent<HealthSettings>): Promise<void> {
     const next =
       ((this.#selection.get(event.action.id) ?? 0) + 1) %
       HEALTH_COMPONENTS.length;
@@ -41,7 +43,7 @@ export class HealthAction extends SingletonAction {
     );
   }
 
-  private async draw(actionInstance: Action): Promise<void> {
+  private async draw(actionInstance: Action<HealthSettings>): Promise<void> {
     if (!actionInstance.isKey()) return;
     const snapshot = collectHealth(codexStore);
     const component = HEALTH_COMPONENTS[
diff --git a/src/actions/keycap.ts b/src/actions/keycap.ts
index 5e6339a..a2d819e 100644
--- a/src/actions/keycap.ts
+++ b/src/actions/keycap.ts
@@ -38,7 +38,7 @@ export class KeycapAction extends SingletonAction<KeycapSettings> {
   }
 
   async onKeyDown(event: KeyDownEvent<KeycapSettings>): Promise<void> {
-    const settings = await event.action.getSettings<KeycapSettings>();
+    const settings = await event.action.getSettings();
     const actionKind = settings.action ?? "info";
     try {
       if (actionKind === "new-chat") await openNewChat();
@@ -83,7 +83,7 @@ export class KeycapAction extends SingletonAction<KeycapSettings> {
 
   private async draw(actionInstance: Action<KeycapSettings>): Promise<void> {
     if (!actionInstance.isKey()) return;
-    const settings = await actionInstance.getSettings<KeycapSettings>();
+    const settings = await actionInstance.getSettings();
     await renderKey(
       actionInstance,
       svgDataUrl(
diff --git a/src/actions/model.ts b/src/actions/model.ts
index 9aa99ba..eb739e2 100644
--- a/src/actions/model.ts
+++ b/src/actions/model.ts
@@ -16,6 +16,7 @@ import {
   type ModelDialState,
 } from "../lib/model.js";
 import { renderFeedback } from "../lib/render-cache.js";
+import { showActionAlert } from "../lib/streamdeck-alert.js";
 import { dialFailureFeedback } from "../lib/visuals.js";
 
 type ModelSettings = {
@@ -115,7 +116,7 @@ export class ModelAction extends SingletonAction<ModelSettings> {
       streamDeck.logger.warn(
         `Ignored unavailable model ${current.selected || "(none)"}`,
       );
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
       return;
     }
 
@@ -158,7 +159,7 @@ export class ModelAction extends SingletonAction<ModelSettings> {
           dialFailureFeedback(pickerFailureLabel(error)),
         );
       }
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
     }
   }
 
diff --git a/src/actions/reasoning.ts b/src/actions/reasoning.ts
index 3a88d77..7c2db20 100644
--- a/src/actions/reasoning.ts
+++ b/src/actions/reasoning.ts
@@ -17,6 +17,7 @@ import {
   type ReasoningDialState,
 } from "../lib/reasoning.js";
 import { renderFeedback } from "../lib/render-cache.js";
+import { showActionAlert } from "../lib/streamdeck-alert.js";
 import { dialFailureFeedback } from "../lib/visuals.js";
 
 type ReasoningSettings = {
@@ -121,7 +122,7 @@ export class ReasoningAction extends SingletonAction<ReasoningSettings> {
       streamDeck.logger.warn(
         `Ignored unsupported reasoning level ${current.selected} for ${snapshot.model ?? "current model"}`,
       );
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
       return;
     }
     await this.apply(context, actionInstance, current.selected);
@@ -176,7 +177,7 @@ export class ReasoningAction extends SingletonAction<ReasoningSettings> {
           dialFailureFeedback(pickerFailureLabel(error)),
         );
       }
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
     }
   }
 
diff --git a/src/actions/usage.ts b/src/actions/usage.ts
index c934002..daa627c 100644
--- a/src/actions/usage.ts
+++ b/src/actions/usage.ts
@@ -10,17 +10,19 @@ import { toggleUsageView, type UsageView } from "../lib/usage.js";
 import { svgDataUrl, usageKeySvg } from "../lib/visuals.js";
 import { renderKey } from "../lib/render-cache.js";
 
+type UsageSettings = Record<string, never>;
+
 @action({ UUID: "com.todd.streamdeckcodex.usage" })
-export class UsageAction extends SingletonAction {
+export class UsageAction extends SingletonAction<UsageSettings> {
   readonly #mode = new Map<string, UsageView>();
 
-  async onWillAppear(event: WillAppearEvent): Promise<void> {
+  async onWillAppear(event: WillAppearEvent<UsageSettings>): Promise<void> {
     if (!event.action.isKey()) return;
     this.#mode.set(event.action.id, "weekly");
     await this.draw(event.action);
   }
 
-  async onKeyDown(event: KeyDownEvent): Promise<void> {
+  async onKeyDown(event: KeyDownEvent<UsageSettings>): Promise<void> {
     const current = this.#mode.get(event.action.id) ?? "weekly";
     this.#mode.set(event.action.id, toggleUsageView(current));
     await this.draw(event.action);
@@ -34,7 +36,7 @@ export class UsageAction extends SingletonAction {
     );
   }
 
-  private async draw(actionInstance: Action): Promise<void> {
+  private async draw(actionInstance: Action<UsageSettings>): Promise<void> {
     if (!actionInstance.isKey()) return;
     const snapshot = codexStore.usageSnapshotCached();
     await renderKey(
diff --git a/src/actions/workflow.ts b/src/actions/workflow.ts
index d0334c0..bd06388 100644
--- a/src/actions/workflow.ts
+++ b/src/actions/workflow.ts
@@ -12,6 +12,7 @@ import { launchWorkflow } from "../lib/automation.js";
 import { codexStore } from "../lib/codex-store.js";
 import { commandKeySvg, svgDataUrl } from "../lib/visuals.js";
 import { renderFeedback, renderKey } from "../lib/render-cache.js";
+import { showActionAlert } from "../lib/streamdeck-alert.js";
 import {
   workflowAt,
   WORKFLOWS,
@@ -106,7 +107,7 @@ export class WorkflowAction extends SingletonAction<WorkflowSettings> {
       );
       if (actionInstance.isKey()) await actionInstance.showOk();
     } catch {
-      await actionInstance.showAlert();
+      await showActionAlert(actionInstance);
     }
   }
 
diff --git a/src/lib/streamdeck-alert.ts b/src/lib/streamdeck-alert.ts
new file mode 100644
index 0000000..1593d31
--- /dev/null
+++ b/src/lib/streamdeck-alert.ts
@@ -0,0 +1,16 @@
+import type { Action } from "@elgato/streamdeck";
+
+type JsonObject = {
+  [key: string]: JsonValue;
+};
+type JsonValue =
+  boolean | number | string | null | undefined | JsonObject | JsonValue[];
+
+/**
+ * SDK v3 keeps `showAlert` on keys and dials only; Neo Infobar actions omit it.
+ */
+export async function showActionAlert<T extends JsonObject>(
+  action: Action<T>,
+): Promise<void> {
+  if (action.isKey() || action.isDial()) await action.showAlert();
+}
diff --git a/test/helpers/fake-streamdeck-action.ts b/test/helpers/fake-streamdeck-action.ts
index 35473b4..f0adea4 100644
--- a/test/helpers/fake-streamdeck-action.ts
+++ b/test/helpers/fake-streamdeck-action.ts
@@ -17,9 +17,12 @@ export class FakeStreamDeckAction<
   isDial(): boolean {
     return this.kind === "dial";
   }
-  async getSettings<U = T>(): Promise<U> {
+  isNeoInfobar(): boolean {
+    return false;
+  }
+  async getSettings(): Promise<T> {
     this.calls.push({ method: "getSettings" });
-    return this.settings as unknown as U;
+    return this.settings;
   }
   async setSettings(value: T): Promise<void> {
     this.settings = value;