diff --git a/packages/shared/src/analytics/consent.ts b/packages/shared/src/analytics/consent.ts
new file mode 100644
index 00000000..82c58dda
--- /dev/null
+++ b/packages/shared/src/analytics/consent.ts
@@ -0,0 +1,14 @@
+import type { ConsentState } from "./types.js";
+
+export function shouldShowConsent(consent: ConsentState, serverEnabled: boolean): boolean {
+  if (!serverEnabled) return false;
+  if (consent.analyticsEnabled !== null) return false;
+  if (consent.analyticsConsentShownAt === null) return true;
+  if (consent.analyticsConsentRemindAt === null) return false;
+  return Date.now() >= consent.analyticsConsentRemindAt;
+}
+
+export function isConsentEnabled(consent: ConsentState, serverEnabled: boolean): boolean {
+  if (!serverEnabled) return false;
+  return consent.analyticsEnabled === true;
+}
diff --git a/packages/shared/src/analytics/events.ts b/packages/shared/src/analytics/events.ts
new file mode 100644
index 00000000..0dac225e
--- /dev/null
+++ b/packages/shared/src/analytics/events.ts
@@ -0,0 +1,38 @@
+export const ANALYTICS_EVENTS = {
+  TOOL_USED: "tool_used",
+  SEARCH: "search",
+  PIPELINE_EXECUTED: "pipeline_executed",
+  AI_BUNDLE_ACTION: "ai_bundle_action",
+} as const;
+
+export type AnalyticsEvent = (typeof ANALYTICS_EVENTS)[keyof typeof ANALYTICS_EVENTS];
+
+export interface ToolUsedProperties {
+  tool_id: string;
+  status: "completed" | "failed";
+  duration_ms: number;
+  category: string;
+  is_ai_tool: boolean;
+  params?: Record<string, string | number | boolean>;
+}
+
+export interface SearchProperties {
+  query: string;
+  results_count: number;
+  clicked_tool_id?: string;
+}
+
+export interface PipelineExecutedProperties {
+  step_count: number;
+  tool_ids: string[];
+  is_batch: boolean;
+  file_count?: number;
+  duration_ms: number;
+  status: "completed" | "failed";
+}
+
+export interface AiBundleActionProperties {
+  bundle_id: string;
+  action: "installed" | "uninstalled";
+  duration_ms: number;
+}
diff --git a/packages/shared/src/analytics/types.ts b/packages/shared/src/analytics/types.ts
new file mode 100644
index 00000000..fcd4fec0
--- /dev/null
+++ b/packages/shared/src/analytics/types.ts
@@ -0,0 +1,14 @@
+export interface AnalyticsConfig {
+  enabled: boolean;
+  posthogApiKey: string;
+  posthogHost: string;
+  sentryDsn: string;
+  sampleRate: number;
+  instanceId: string;
+}
+
+export interface ConsentState {
+  analyticsEnabled: boolean | null;
+  analyticsConsentShownAt: number | null;
+  analyticsConsentRemindAt: number | null;
+}
diff --git a/packages/shared/src/i18n/en.ts b/packages/shared/src/i18n/en.ts
index b4966619..d5db962f 100644
--- a/packages/shared/src/i18n/en.ts
+++ b/packages/shared/src/i18n/en.ts
@@ -301,6 +301,33 @@ export const en = {
     help: "Help",
     settings: "Settings",
   },
+  analytics: {
+    consentTitle: "Make ashim better for you",
+    consentDescription:
+      'Anonymous product analytics — like "crop tool used" or "an error occurred" — help us fix bugs faster and build the tools you actually want.',
+    consentPrivacy: "Your images never leave your machine. Ever.",
+    whatShared: "What's shared:",
+    whatSharedItems: [
+      "Which tools you use",
+      "Error reports (no file data)",
+      "App version and performance",
+    ],
+    whatNever: "What NEVER leaves your machine:",
+    whatNeverItems: [
+      "Your images, PDFs, and files",
+      "File names and contents",
+      "Any personal information",
+    ],
+    consentProviders: "Data is sent to PostHog (analytics) and Sentry (errors) — both open-source.",
+    consentChangeable: "You can change this anytime in Settings.",
+    acceptButton: "Sure, sounds good",
+    declineButton: "Maybe later",
+    settingsTitle: "Product Analytics",
+    settingsDescription: "Share anonymous usage data to help improve ashim.",
+    settingsPrivacy: "Your images never leave your machine.",
+    settingsDisabledByAdmin: "Product analytics has been disabled by the server administrator.",
+    learnMore: "Learn more",
+  },
 } as const;
 
 export type TranslationKeys = typeof en;
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 848984c6..5e99a350 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -1,3 +1,6 @@
+export * from "./analytics/consent.js";
+export * from "./analytics/events.js";
+export * from "./analytics/types.js";
 export * from "./constants.js";
 export * from "./features.js";
 export * from "./i18n/index.js";
diff --git a/tests/unit/analytics-consent.test.ts b/tests/unit/analytics-consent.test.ts
new file mode 100644
index 00000000..4a18c146
--- /dev/null
+++ b/tests/unit/analytics-consent.test.ts
@@ -0,0 +1,123 @@
+import { isConsentEnabled, shouldShowConsent } from "@ashim/shared";
+import { describe, expect, it } from "vitest";
+
+describe("shouldShowConsent", () => {
+  it("returns false when server has analytics disabled", () => {
+    expect(
+      shouldShowConsent(
+        {
+          analyticsEnabled: null,
+          analyticsConsentShownAt: null,
+          analyticsConsentRemindAt: null,
+        },
+        false,
+      ),
+    ).toBe(false);
+  });
+
+  it("returns true for a fresh user who has never been asked", () => {
+    expect(
+      shouldShowConsent(
+        {
+          analyticsEnabled: null,
+          analyticsConsentShownAt: null,
+          analyticsConsentRemindAt: null,
+        },
+        true,
+      ),
+    ).toBe(true);
+  });
+
+  it("returns false when user already opted in", () => {
+    expect(
+      shouldShowConsent(
+        {
+          analyticsEnabled: true,
+          analyticsConsentShownAt: Date.now(),
+          analyticsConsentRemindAt: null,
+        },
+        true,
+      ),
+    ).toBe(false);
+  });
+
+  it("returns false when user explicitly declined", () => {
+    expect(
+      shouldShowConsent(
+        {
+          analyticsEnabled: false,
+          analyticsConsentShownAt: Date.now(),
+          analyticsConsentRemindAt: null,
+        },
+        true,
+      ),
+    ).toBe(false);
+  });
+
+  it("returns false when remind-at is in the future", () => {
+    expect(
+      shouldShowConsent(
+        {
+          analyticsEnabled: null,
+          analyticsConsentShownAt: Date.now() - 86400000,
+          analyticsConsentRemindAt: Date.now() + 86400000,
+        },
+        true,
+      ),
+    ).toBe(false);
+  });
+
+  it("returns true when remind-at has passed", () => {
+    expect(
+      shouldShowConsent(
+        {
+          analyticsEnabled: null,
+          analyticsConsentShownAt: Date.now() - 86400000 * 8,
+          analyticsConsentRemindAt: Date.now() - 86400000,
+        },
+        true,
+      ),
+    ).toBe(true);
+  });
+});
+
+describe("isConsentEnabled", () => {
+  it("returns false when server disabled", () => {
+    expect(
+      isConsentEnabled(
+        {
+          analyticsEnabled: true,
+          analyticsConsentShownAt: Date.now(),
+          analyticsConsentRemindAt: null,
+        },
+        false,
+      ),
+    ).toBe(false);
+  });
+
+  it("returns false when user has not consented", () => {
+    expect(
+      isConsentEnabled(
+        {
+          analyticsEnabled: null,
+          analyticsConsentShownAt: null,
+          analyticsConsentRemindAt: null,
+        },
+        true,
+      ),
+    ).toBe(false);
+  });
+
+  it("returns true when user opted in and server enabled", () => {
+    expect(
+      isConsentEnabled(
+        {
+          analyticsEnabled: true,
+          analyticsConsentShownAt: Date.now(),
+          analyticsConsentRemindAt: null,
+        },
+        true,
+      ),
+    ).toBe(true);
+  });
+});