Replace Scarf with TanStack company analytics

src/libraries/libraries.ts

@@ -24,7 +24,6 @@ export const query: LibrarySlim = {
   corePackageName: '@tanstack/query-core',
   npmPackageNames: ['@tanstack/query-core', 'react-query'],
   availableVersions: ['v5', 'v4', 'v3'],
-  scarfId: '53afb586-3934-4624-a37a-e680c1528e17',
   defaultDocs: 'framework/react/overview',
   sitemap: {
     includeLandingPage: true,
@@ -209,7 +208,6 @@ export const router: LibrarySlim = {
   latestVersion: 'v1',
   latestBranch: 'main',
   availableVersions: ['v1'],
-  scarfId: '3d14fff2-f326-4929-b5e1-6ecf953d24f4',
   docsRoot: 'docs/router',
   sitemap: {
     includeLandingPage: true,
@@ -272,7 +270,6 @@ export const start: LibrarySlim = {
   availableVersions: ['v0'],
   corePackageName: '@tanstack/start-client-core',
   npmPackageNames: ['@tanstack/start-client-core'],
-  scarfId: 'b6e2134f-e805-401d-95c3-2a7765d49a3d',
   docsRoot: 'docs/start',
   defaultDocs: 'framework/react/overview',
   sitemap: {
@@ -313,7 +310,6 @@ export const table: LibrarySlim = {
   latestVersion: 'v9',
   latestBranch: 'main',
   availableVersions: ['v9', 'v8'],
-  scarfId: 'dc8b39e1-3fe9-4f3a-8e56-d4e2cf420a9e',
   defaultDocs: 'overview',
   sitemap: {
     includeLandingPage: true,
@@ -439,7 +435,6 @@ export const form: LibrarySlim = {
   latestVersion: 'v1',
   latestBranch: 'main',
   availableVersions: ['v1', 'alpha'],
-  scarfId: '72ec4452-5d77-427c-b44a-57515d2d83aa',
   sitemap: {
     includeLandingPage: true,
     includeDocsPages: true,
@@ -462,7 +457,6 @@ export const virtual: LibrarySlim = {
   latestVersion: 'v3',
   latestBranch: 'main',
   availableVersions: ['v3'],
-  scarfId: '32372eb1-91e0-48e7-8df1-4808a7be6b94',
   defaultDocs: 'introduction',
   legacyPackages: ['react-virtual'],
   sitemap: {
@@ -488,7 +482,6 @@ export const ranger: LibrarySlim = {
   latestVersion: 'v0',
   latestBranch: 'main',
   availableVersions: ['v0'],
-  scarfId: 'dd278e06-bb3f-420c-85c6-6e42d14d8f61',
   visible: false,
   sitemap: {
     includeLandingPage: true,
@@ -521,7 +514,6 @@ export const store: LibrarySlim = {
   latestVersion: 'v0',
   latestBranch: 'main',
   availableVersions: ['v0'],
-  scarfId: '302d0fef-cb3f-43c6-b45c-f055b9745edb',
   defaultDocs: 'overview',
   sitemap: {
     includeLandingPage: true,
@@ -547,7 +539,6 @@ export const pacer: LibrarySlim = {
   latestVersion: 'v0',
   latestBranch: 'main',
   availableVersions: ['v0'],
-  scarfId: '302d0fef-cb3f-43c6-b45c-f055b9745edb',
   defaultDocs: 'overview',
   sitemap: {
     includeLandingPage: true,
@@ -678,7 +669,6 @@ export const db: LibrarySlim = {
   latestVersion: 'v0',
   latestBranch: 'main',
   availableVersions: ['v0'],
-  scarfId: '302d0fef-cb3f-43c6-b45c-f055b9745edb',
   defaultDocs: 'overview',
   sitemap: {
     includeLandingPage: true,

src/libraries/types.ts

@@ -44,7 +44,6 @@ export type LibrarySlim = {
   latestVersion: string
   latestBranch?: string
   availableVersions: string[]
-  scarfId?: string
   defaultDocs?: string
   docsRoot?: string
   hideCodesandboxUrl?: true

src/routes/__root.tsx

@@ -330,6 +330,14 @@ function ShellComponent({ children }: { children: React.ReactNode }) {
           suppressHydrationWarning
         />
         <HeadContent />
+        {import.meta.env.PROD ? (
+          <script
+            defer
+            src="https://namethathost.com/tracker.js"
+            data-site="b7d91d66-ccee-480a-9d33-f7a9f109edc4"
+            referrerPolicy="no-referrer"
+          />
+        ) : null}
         <style
           id="tanstack-highlight-theme"
           dangerouslySetInnerHTML={{ __html: HIGHLIGHT_THEME_CSS }}

src/routes/_library/$libraryId/route.tsx

@@ -1,6 +1,5 @@
 import { createFileRoute } from '@tanstack/react-router'
 import { notFound, Outlet } from '@tanstack/react-router'
-import { Scarf } from '~/components/Scarf'
 import { findLibrary, LibraryId } from '~/libraries'
 import { seo } from '~/utils/seo'
 import { ogImageUrl } from '~/utils/og'
@@ -65,10 +64,5 @@ function RouteForm() {
     return null
   }
 
-  return (
-    <>
-      <Outlet />
-      {library?.scarfId ? <Scarf id={library.scarfId} /> : null}
-    </>
-  )
+  return <Outlet />
 }

src/routes/privacy.tsx

@@ -17,7 +17,7 @@ function RouteComp() {
       <div className="flex-1 space-y-12 w-full max-w-3xl mx-auto">
         <header className="">
           <h1 className="text-4xl font-bold">Privacy Policy</h1>
-          <p className="">Effective Date: January 18, 2025</p>
+          <p className="">Effective Date: September 10, 2026</p>
         </header>
 
         <section className="">
@@ -78,6 +78,19 @@ function RouteComp() {
 
         <section>
           <h2 className="text-2xl font-semibold">3. Cookies and Tracking</h2>
+          <p>
+            We use namethathost.com, operated by TanStack, to understand which
+            companies visit our public pages and which libraries interest them.
+            This tracker uses no cookies or persistent device IDs. It records
+            page paths without query strings and referring website origins. We
+            temporarily process IP addresses through ipapi.is to look up
+            associated company networks. A network match does not identify a
+            person or confirm that a company uses TanStack. Encrypted addresses
+            are held only for delivery and retries, and company lookups stop
+            after 24 hours. Our daily cleanup removes company cache entries
+            older than seven days and activity older than 30 days. This tracker
+            respects Do Not Track and Global Privacy Control.
+          </p>
           <p>
             The Site uses cookies and similar tracking technologies to analyze
             trends, track user behavior, and gather demographic information.

tests/static-data-contracts.test.ts

@@ -7,9 +7,6 @@ import {
   publicLibraries,
 } from '../src/libraries/libraries'
 
-const uuidPattern =
-  /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
-
 assert.deepEqual(
   publicLibraries,
   libraries.filter(isPublicLibrary),
@@ -40,18 +37,6 @@ for (const library of publicLibraries) {
   )
 }
 
-for (const library of libraries) {
-  if (!library.scarfId) {
-    continue
-  }
-
-  assert.match(
-    library.scarfId,
-    uuidPattern,
-    `${library.id} scarfId must be a UUID`,
-  )
-}
-
 for (const maintainer of allMaintainers) {
   const socialEntries = Object.entries(maintainer.social ?? {})