diff --git a/apps/examples/desktop-app/sidecar/marketplace-telemetry.ts b/apps/examples/desktop-app/sidecar/marketplace-telemetry.ts
index d08aa16eaf..0383ac365a 100644
--- a/apps/examples/desktop-app/sidecar/marketplace-telemetry.ts
+++ b/apps/examples/desktop-app/sidecar/marketplace-telemetry.ts
@@ -1,20 +1,11 @@
-import type { ITelemetryService, TelemetryProperties } from "@cline/shared";
+import {
+	captureMarketplaceInstall,
+	type MarketplaceInstallProperties,
+} from "@cline/core";
+import type { ITelemetryService } from "@cline/shared";
 import type { JsonRecord } from "./types";
 
-export type MarketplaceInstallOutcome =
-	| "installed"
-	| "already_installed"
-	| "failed";
-
-export interface MarketplaceInstallEvent {
-	type: string;
-	outcome: MarketplaceInstallOutcome;
-	/** Which path produced the outcome: skills-cli, github-download, already-installed. */
-	method?: string;
-	/** Coarse class of the skills CLI failure, when one happened. */
-	cli_failure?: string;
-	fallback_failed?: boolean;
-}
+export type MarketplaceInstallEvent = MarketplaceInstallProperties;
 
 /** The marketplace entry type a desktop install request asked for. */
 export function requestedMarketplaceType(
@@ -66,11 +57,7 @@ export function captureMarketplaceInstallEvent(
 ): void {
 	try {
 		if (!telemetry?.isEnabled()) return;
-		const properties: TelemetryProperties = {};
-		for (const [key, value] of Object.entries(event)) {
-			if (value !== undefined) properties[key] = value;
-		}
-		telemetry.capture({ event: "desktop.marketplace.install", properties });
+		captureMarketplaceInstall(telemetry, event);
 	} catch {
 		// Product interactions must continue if the telemetry provider fails.
 	}
diff --git a/sdk/packages/core/src/index.ts b/sdk/packages/core/src/index.ts
index 232792206b..d7097f45eb 100644
--- a/sdk/packages/core/src/index.ts
+++ b/sdk/packages/core/src/index.ts
@@ -791,6 +791,7 @@ export type {
 	CaptureCompactionExecutedProperties,
 	CaptureCompactionSkippedProperties,
 	GitSnapshotProperties,
+	MarketplaceInstallProperties,
 	TelemetryAgentIdentityProperties,
 	TelemetryAgentKind,
 	TelemetryCompactionMode,
@@ -816,6 +817,7 @@ export {
 	captureExtensionActivated,
 	captureGitSnapshot,
 	captureHookDiscovery,
+	captureMarketplaceInstall,
 	captureMentionFailed,
 	captureMentionSearchResults,
 	captureMentionUsed,
diff --git a/sdk/packages/core/src/services/telemetry/core-events.test.ts b/sdk/packages/core/src/services/telemetry/core-events.test.ts
index 2ae225fd40..cc24b1f4ec 100644
--- a/sdk/packages/core/src/services/telemetry/core-events.test.ts
+++ b/sdk/packages/core/src/services/telemetry/core-events.test.ts
@@ -17,6 +17,7 @@ import {
 	captureCompactionSkipped,
 	captureExtensionActivated,
 	captureGitSnapshot,
+	captureMarketplaceInstall,
 	captureMistakeLimitReached,
 	captureProviderConfigured,
 	captureRunCommandsTimeout,
@@ -1072,3 +1073,39 @@ test("scheduler telemetry allowlists diagnostics and tolerates capture failures"
 	expect(() => captureScheduleRun(telemetry, input)).not.toThrow();
 	expect(() => captureScheduleRun(undefined, input)).not.toThrow();
 });
+
+describe("captureMarketplaceInstall", () => {
+	test("emits desktop.marketplace.install with only the defined fields", () => {
+		const capture = vi.fn();
+		const telemetry = { capture } as unknown as Parameters<
+			typeof captureMarketplaceInstall
+		>[0];
+
+		captureMarketplaceInstall(telemetry, {
+			type: "skill",
+			outcome: "failed",
+			method: "github-download",
+			cli_failure: "git-missing",
+			fallback_failed: true,
+		});
+		captureMarketplaceInstall(telemetry, { type: "mcp", outcome: "installed" });
+
+		expect(CORE_TELEMETRY_EVENTS.DESKTOP.MARKETPLACE_INSTALL).toBe(
+			"desktop.marketplace.install",
+		);
+		expect(capture).toHaveBeenNthCalledWith(1, {
+			event: "desktop.marketplace.install",
+			properties: {
+				type: "skill",
+				outcome: "failed",
+				method: "github-download",
+				cli_failure: "git-missing",
+				fallback_failed: true,
+			},
+		});
+		expect(capture).toHaveBeenNthCalledWith(2, {
+			event: "desktop.marketplace.install",
+			properties: { type: "mcp", outcome: "installed" },
+		});
+	});
+});
diff --git a/sdk/packages/core/src/services/telemetry/core-events.ts b/sdk/packages/core/src/services/telemetry/core-events.ts
index 38c8bca355..b66c9e0f80 100644
--- a/sdk/packages/core/src/services/telemetry/core-events.ts
+++ b/sdk/packages/core/src/services/telemetry/core-events.ts
@@ -105,6 +105,9 @@ export const CORE_TELEMETRY_EVENTS = {
 		INIT_ERROR: "workspace.init_error",
 		PATH_RESOLVED: "workspace.path_resolved",
 	},
+	DESKTOP: {
+		MARKETPLACE_INSTALL: "desktop.marketplace.install",
+	},
 	SDK: {
 		ERROR: SDK_ERROR_TELEMETRY_EVENT,
 		TOOL_TIMEOUT: "sdk.tool_timeout",
@@ -297,6 +300,39 @@ export function captureWorkspacePathResolved(
 	});
 }
 
+export interface MarketplaceInstallProperties {
+	/** Marketplace entry type: skill, plugin, mcp. */
+	type: string;
+	outcome: "installed" | "already_installed" | "failed";
+	/** Path that produced the outcome: skills-cli, github-download, already-installed. */
+	method?: string;
+	/** Coarse class of a skills CLI failure: npx-missing, node-too-old, git-missing, other. */
+	cli_failure?: string;
+	fallback_failed?: boolean;
+}
+
+/**
+ * One event per Desktop marketplace install attempt. Only coarse classes are
+ * sent, never CLI output, so the payload cannot carry paths or tokens.
+ */
+export function captureMarketplaceInstall(
+	telemetry: ITelemetryService | undefined,
+	properties: MarketplaceInstallProperties,
+): void {
+	const payload: TelemetryProperties = {
+		type: properties.type,
+		outcome: properties.outcome,
+	};
+	if (properties.method !== undefined) payload.method = properties.method;
+	if (properties.cli_failure !== undefined) {
+		payload.cli_failure = properties.cli_failure;
+	}
+	if (properties.fallback_failed !== undefined) {
+		payload.fallback_failed = properties.fallback_failed;
+	}
+	emit(telemetry, CORE_TELEMETRY_EVENTS.DESKTOP.MARKETPLACE_INSTALL, payload);
+}
+
 export function captureAuthStarted(
 	telemetry: ITelemetryService | undefined,
 	provider?: string,