feat(core-analytics): add React provider and useAnalytics hook

Adds a ./react subpath export to @repo/core-analytics containing
<AnalyticsProvider value={IAnalytics}> and useAnalytics(): IAnalytics.
useAnalytics() throws AnalyticsContextError when called outside a provider.
React Testing Library test verifies track() flows through context using
RecordingAnalytics. Switches vitest config to pick up .tsx test files
via environmentMatchGlobs and extends tsconfig to react-library.json
for JSX support.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

coverage/summary.json

@@ -1,18 +1,18 @@
 {
-  "generatedAt": "2026-05-18T15:19:07.787Z",
+  "generatedAt": "2026-05-18T15:54:10.661Z",
-  "commit": "81f75f7",
+  "commit": "065ca1b",
   "repo": {
-    "statements": 95.89,
+    "statements": 95.92,
-    "branches": 89.07,
+    "branches": 89.18,
     "functions": 100,
-    "lines": 95.89,
+    "lines": 95.92,
     "counts": {
-      "lf": 3140,
+      "lf": 3165,
-      "lh": 3011,
+      "lh": 3036,
-      "brf": 494,
+      "brf": 499,
-      "brh": 440,
+      "brh": 445,
-      "fnf": 149,
+      "fnf": 152,
-      "fnh": 149
+      "fnh": 152
     }
   },
   "byPackage": {
@@ -50,12 +50,12 @@
       "functions": 100,
       "lines": 100,
       "counts": {
-        "lf": 27,
+        "lf": 52,
-        "lh": 27,
+        "lh": 52,
-        "brf": 7,
+        "brf": 12,
-        "brh": 7,
+        "brh": 12,
-        "fnf": 7,
+        "fnf": 10,
-        "fnh": 7
+        "fnh": 10
       }
     },
     "@repo/marketing-pages": {

packages/core-analytics/package.json

@@ -4,7 +4,8 @@
   "private": true,
   "type": "module",
   "exports": {
-    ".": "./src/index.ts"
+    ".": "./src/index.ts",
+    "./react": "./src/react/index.ts"
   },
   "scripts": {
     "build": "tsc --noEmit",
@@ -12,6 +13,14 @@
     "typecheck": "tsc --noEmit",
     "test": "vitest run --passWithNoTests"
   },
+  "peerDependencies": {
+    "react": "^18.0.0 || ^19.0.0"
+  },
+  "peerDependenciesMeta": {
+    "react": {
+      "optional": true
+    }
+  },
   "dependencies": {
     "@repo/core-shared": "workspace:*"
   },
@@ -19,7 +28,11 @@
     "@repo/core-eslint": "workspace:*",
     "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
+    "@testing-library/react": "^16.0.0",
+    "@types/react": "^19.0.0",
     "@vitest/coverage-v8": "^3.0.0",
+    "jsdom": "^25.0.0",
+    "react": "^19.0.0",
     "typescript": "^5.8.0",
     "vitest": "^3.0.0"
   }

packages/core-analytics/src/react/analytics-provider.test.tsx

@@ -0,0 +1,41 @@
+import { describe, expect, it, vi } from "vitest";
+import { render, renderHook } from "@testing-library/react";
+import { RecordingAnalytics } from "@repo/core-testing";
+import {
+  AnalyticsContextError,
+  AnalyticsProvider,
+  useAnalytics,
+} from "@/react/index";
+
+function Tracker() {
+  const analytics = useAnalytics();
+  analytics.track("test.event");
+  return null;
+}
+
+describe("AnalyticsProvider", () => {
+  it("makes analytics available through context and track flows through", () => {
+    const recording = new RecordingAnalytics();
+
+    render(
+      <AnalyticsProvider value={recording}>
+        <Tracker />
+      </AnalyticsProvider>,
+    );
+
+    expect(recording.tracked).toContainEqual({ event: "test.event" });
+  });
+});
+
+describe("useAnalytics", () => {
+  it("throws AnalyticsContextError when called outside a provider", () => {
+    const spy = vi.spyOn(console, "error").mockImplementation(() => {});
+    try {
+      expect(() => renderHook(() => useAnalytics())).toThrow(
+        AnalyticsContextError,
+      );
+    } finally {
+      spy.mockRestore();
+    }
+  });
+});

packages/core-analytics/src/react/analytics-provider.tsx

@@ -0,0 +1,33 @@
+import { createContext, useContext, type ReactNode } from "react";
+import type { IAnalytics } from "../analytics.interface";
+
+const AnalyticsContext = createContext<IAnalytics | null>(null);
+
+export class AnalyticsContextError extends Error {
+  constructor() {
+    super("useAnalytics() must be called within an <AnalyticsProvider>.");
+    this.name = "AnalyticsContextError";
+  }
+}
+
+export function AnalyticsProvider({
+  value,
+  children,
+}: {
+  value: IAnalytics;
+  children: ReactNode;
+}) {
+  return (
+    <AnalyticsContext.Provider value={value}>
+      {children}
+    </AnalyticsContext.Provider>
+  );
+}
+
+export function useAnalytics(): IAnalytics {
+  const analytics = useContext(AnalyticsContext);
+  if (analytics === null) {
+    throw new AnalyticsContextError();
+  }
+  return analytics;
+}

packages/core-analytics/src/react/index.ts

@@ -0,0 +1,5 @@
+export {
+  AnalyticsProvider,
+  useAnalytics,
+  AnalyticsContextError,
+} from "./analytics-provider";

packages/core-analytics/tsconfig.json

@@ -1,5 +1,5 @@
 {
-  "extends": "@repo/core-typescript/base.json",
+  "extends": "@repo/core-typescript/react-library.json",
   "compilerOptions": {
     "outDir": "dist",
     "rootDir": ".",
@@ -7,6 +7,6 @@
       "@/*": ["./src/*"]
     }
   },
-  "include": ["**/*.ts"],
+  "include": ["**/*.ts", "**/*.tsx"],
   "exclude": ["node_modules", "dist"]
 }

packages/core-analytics/vitest.config.ts

@@ -1,9 +1,17 @@
 import path from "node:path";
-import { mergeConfig } from "vitest/config";
+import { defineConfig, mergeConfig } from "vitest/config";
 import { nodeVitestConfig } from "@repo/core-typescript/vitest.base.node";
 
-export default mergeConfig(nodeVitestConfig, {
+export default mergeConfig(
+  nodeVitestConfig,
+  defineConfig({
+    test: {
+      include: ["src/**/*.test.{ts,tsx}", "tests/**/*.test.{ts,tsx}"],
+      environmentMatchGlobs: [["**/*.test.tsx", "jsdom"]],
+      setupFiles: ["@repo/core-testing/setup/jsdom"],
+    },
     resolve: {
       alias: { "@": path.resolve(__dirname, "./src") },
     },
-});
+  }),
+);

pnpm-lock.yaml

@@ -430,9 +430,21 @@ importers:
       "@repo/core-typescript":
         specifier: workspace:*
         version: link:../core-typescript
+      "@testing-library/react":
+        specifier: ^16.0.0
+        version: 16.3.2(@testing-library/dom@10.4.1)(@types/react-dom@19.2.3(@types/react@19.2.14))(@types/react@19.2.14)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
+      "@types/react":
+        specifier: ^19.0.0
+        version: 19.2.14
       "@vitest/coverage-v8":
         specifier: ^3.0.0
         version: 3.2.4(vitest@3.2.4(@types/debug@4.1.13)(@types/node@25.5.2)(happy-dom@20.8.9)(jiti@2.6.1)(jsdom@25.0.1)(lightningcss@1.32.0)(sass@1.99.0)(terser@5.46.2)(tsx@4.21.0)(yaml@2.9.0))
+      jsdom:
+        specifier: ^25.0.0
+        version: 25.0.1
+      react:
+        specifier: ^19.0.0
+        version: 19.2.4
       typescript:
         specifier: ^5.8.0
         version: 5.9.3