feat: add username-based personal subdomains (<username>.rnotes.online)

Implements workspace-scoped data isolation via subdomain routing:

- Schema: add workspaceSlug to Notebook model + migration
- Middleware: extract subdomain → x-workspace-slug header
- API: filter notebooks/notes/search by workspace on subdomains
- AppSwitcher: generate <username>.r*.online links when logged in
- Sessions: SubdomainSession component syncs auth across subdomains
  via .rnotes.online domain-wide cookie
- Auth: auto-migrate unscoped notebooks to user's workspace
- New /api/me endpoint for client-side auth + workspace state

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

prisma/migrations/20260224_add_workspace_slug/migration.sql

@@ -0,0 +1,5 @@
+-- Add workspaceSlug to Notebook for subdomain-based data isolation
+ALTER TABLE "Notebook" ADD COLUMN "workspaceSlug" TEXT NOT NULL DEFAULT '';
+
+-- Index for efficient workspace-scoped queries
+CREATE INDEX "Notebook_workspaceSlug_idx" ON "Notebook"("workspaceSlug");

prisma/schema.prisma

@@ -25,23 +25,25 @@ model User {
 // ─── Notebooks ──────────────────────────────────────────────────────
 
 model Notebook {
-  id            String   @id @default(cuid())
-  title         String
-  slug          String   @unique
-  description   String?  @db.Text
-  coverColor    String   @default("#f59e0b")
-  canvasSlug    String?
-  canvasShapeId String?
-  isPublic      Boolean  @default(false)
-  sortOrder     Int      @default(0)
-  createdAt     DateTime @default(now())
-  updatedAt     DateTime @updatedAt
+  id             String   @id @default(cuid())
+  title          String
+  slug           String   @unique
+  description    String?  @db.Text
+  coverColor     String   @default("#f59e0b")
+  canvasSlug     String?
+  canvasShapeId  String?
+  isPublic       Boolean  @default(false)
+  sortOrder      Int      @default(0)
+  workspaceSlug  String   @default("")  // subdomain scope: "" = personal/unscoped
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
 
   collaborators NotebookCollaborator[]
   notes         Note[]
   sharedAccess  SharedAccess[]
 
   @@index([slug])
+  @@index([workspaceSlug])
 }
 
 enum CollaboratorRole {

src/app/api/me/route.ts

@@ -0,0 +1,29 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { getAuthUser } from '@/lib/auth';
+import { getWorkspaceSlug } from '@/lib/workspace';
+
+export async function GET(request: NextRequest) {
+  try {
+    const auth = await getAuthUser(request);
+    const workspaceSlug = getWorkspaceSlug();
+
+    if (!auth) {
+      return NextResponse.json({
+        authenticated: false,
+        workspace: workspaceSlug || null,
+      });
+    }
+
+    return NextResponse.json({
+      authenticated: true,
+      user: {
+        id: auth.user.id,
+        username: auth.user.username,
+        did: auth.did,
+      },
+      workspace: workspaceSlug || null,
+    });
+  } catch {
+    return NextResponse.json({ authenticated: false, workspace: null });
+  }
+}

src/app/api/notebooks/[id]/notes/route.ts

@@ -3,12 +3,26 @@ import { prisma } from '@/lib/prisma';
 import { stripHtml } from '@/lib/strip-html';
 import { requireAuth, isAuthed, getNotebookRole } from '@/lib/auth';
 import { htmlToTipTapJson, tipTapJsonToMarkdown, mapNoteTypeToCardType } from '@/lib/content-convert';
+import { getWorkspaceSlug } from '@/lib/workspace';
 
 export async function GET(
   _request: NextRequest,
   { params }: { params: { id: string } }
 ) {
   try {
+    const workspaceSlug = getWorkspaceSlug();
+
+    // Verify notebook belongs to current workspace
+    if (workspaceSlug) {
+      const notebook = await prisma.notebook.findUnique({
+        where: { id: params.id },
+        select: { workspaceSlug: true },
+      });
+      if (!notebook || notebook.workspaceSlug !== workspaceSlug) {
+        return NextResponse.json({ error: 'Notebook not found' }, { status: 404 });
+      }
+    }
+
     const notes = await prisma.note.findMany({
       where: { notebookId: params.id, archivedAt: null },
       include: {

src/app/api/notebooks/[id]/route.ts

@@ -1,12 +1,15 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { prisma } from '@/lib/prisma';
 import { requireAuth, isAuthed, getNotebookRole } from '@/lib/auth';
+import { getWorkspaceSlug } from '@/lib/workspace';
 
 export async function GET(
   _request: NextRequest,
   { params }: { params: { id: string } }
 ) {
   try {
+    const workspaceSlug = getWorkspaceSlug();
+
     const notebook = await prisma.notebook.findUnique({
       where: { id: params.id },
       include: {
@@ -14,6 +17,7 @@ export async function GET(
           include: {
             tags: { include: { tag: true } },
           },
+          where: { archivedAt: null },
           orderBy: [{ isPinned: 'desc' }, { sortOrder: 'asc' }, { updatedAt: 'desc' }],
         },
         collaborators: {
@@ -27,6 +31,11 @@ export async function GET(
       return NextResponse.json({ error: 'Notebook not found' }, { status: 404 });
     }
 
+    // Workspace boundary check: if on a subdomain, only show notebooks from that workspace
+    if (workspaceSlug && notebook.workspaceSlug !== workspaceSlug) {
+      return NextResponse.json({ error: 'Notebook not found' }, { status: 404 });
+    }
+
     return NextResponse.json(notebook);
   } catch (error) {
     console.error('Get notebook error:', error);

src/app/api/notebooks/route.ts

@@ -3,10 +3,21 @@ import { prisma } from '@/lib/prisma';
 import { generateSlug } from '@/lib/slug';
 import { nanoid } from 'nanoid';
 import { requireAuth, isAuthed } from '@/lib/auth';
+import { getWorkspaceSlug } from '@/lib/workspace';
 
 export async function GET() {
   try {
+    const workspaceSlug = getWorkspaceSlug();
+
+    const where: Record<string, unknown> = {};
+    if (workspaceSlug) {
+      // On a subdomain: show only that workspace's notebooks
+      where.workspaceSlug = workspaceSlug;
+    }
+    // On bare domain: show all notebooks (cross-workspace view)
+
     const notebooks = await prisma.notebook.findMany({
+      where,
       include: {
         _count: { select: { notes: true } },
         collaborators: {
@@ -28,6 +39,7 @@ export async function POST(request: NextRequest) {
     const auth = await requireAuth(request);
     if (!isAuthed(auth)) return auth;
     const { user } = auth;
+    const workspaceSlug = getWorkspaceSlug();
     const body = await request.json();
     const { title, description, coverColor } = body;
 
@@ -48,6 +60,7 @@ export async function POST(request: NextRequest) {
         slug: finalSlug,
         description: description?.trim() || null,
         coverColor: coverColor || '#f59e0b',
+        workspaceSlug: workspaceSlug || '',
         collaborators: {
           create: { userId: user.id, role: 'OWNER' },
         },

src/app/api/notes/route.ts

@@ -4,6 +4,7 @@ import { stripHtml } from '@/lib/strip-html';
 import { NoteType } from '@prisma/client';
 import { requireAuth, isAuthed } from '@/lib/auth';
 import { htmlToTipTapJson, tipTapJsonToMarkdown, mapNoteTypeToCardType } from '@/lib/content-convert';
+import { getWorkspaceSlug } from '@/lib/workspace';
 
 export async function GET(request: NextRequest) {
   try {
@@ -13,6 +14,7 @@ export async function GET(request: NextRequest) {
     const cardType = searchParams.get('cardType');
     const tag = searchParams.get('tag');
     const pinned = searchParams.get('pinned');
+    const workspaceSlug = getWorkspaceSlug();
 
     const where: Record<string, unknown> = {
       archivedAt: null, // exclude soft-deleted
@@ -25,11 +27,19 @@ export async function GET(request: NextRequest) {
       where.tags = { some: { tag: { name: tag.toLowerCase() } } };
     }
 
+    // Workspace boundary: filter notes by their notebook's workspace
+    if (workspaceSlug) {
+      where.notebook = {
+        ...(where.notebook as object || {}),
+        workspaceSlug,
+      };
+    }
+
     const notes = await prisma.note.findMany({
       where,
       include: {
         tags: { include: { tag: true } },
-        notebook: { select: { id: true, title: true, slug: true } },
+        notebook: { select: { id: true, title: true, slug: true, workspaceSlug: true } },
         parent: { select: { id: true, title: true } },
         children: { select: { id: true, title: true, cardType: true }, where: { archivedAt: null } },
         attachments: { include: { file: true }, orderBy: { position: 'asc' } },

src/app/api/notes/search/route.ts

@@ -1,5 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { prisma } from '@/lib/prisma';
+import { getWorkspaceSlug } from '@/lib/workspace';
 
 export const dynamic = 'force-dynamic';
 
@@ -10,6 +11,7 @@ export async function GET(request: NextRequest) {
     const type = searchParams.get('type');
     const cardType = searchParams.get('cardType');
     const notebookId = searchParams.get('notebookId');
+    const workspaceSlug = getWorkspaceSlug();
 
     if (!q) {
       return NextResponse.json({ error: 'Query parameter q is required' }, { status: 400 });
@@ -32,6 +34,12 @@ export async function GET(request: NextRequest) {
       filters.push(`n."notebookId" = $${params.length}`);
     }
 
+    // Workspace boundary: only search within the current workspace's notebooks
+    if (workspaceSlug) {
+      params.push(workspaceSlug);
+      filters.push(`nb."workspaceSlug" = $${params.length}`);
+    }
+
     const whereClause = filters.length > 0 ? `AND ${filters.join(' AND ')}` : '';
 
     // Full-text search — prefer bodyMarkdown over contentPlain

src/app/layout.tsx

@@ -3,6 +3,7 @@ import { Inter } from 'next/font/google'
 import './globals.css'
 import { AuthProvider } from '@/components/AuthProvider'
 import { PWAInstall } from '@/components/PWAInstall'
+import { SubdomainSession } from '@/components/SubdomainSession'
 
 const inter = Inter({
   subsets: ['latin'],
@@ -46,6 +47,7 @@ export default function RootLayout({
       </head>
       <body className={`${inter.variable} font-sans antialiased`}>
         <AuthProvider>
+          <SubdomainSession />
           {children}
           <PWAInstall />
         </AuthProvider>

src/components/AppSwitcher.tsx

@@ -65,12 +65,23 @@ const CATEGORY_ORDER = [
   'Social & Sharing',
 ];
 
+/** Build the URL for a module, using username subdomain if logged in */
+function getModuleUrl(m: AppModule, username: string | null): string {
+  if (!m.domain) return '#';
+  if (username) {
+    // Generate <username>.<domain> URL
+    return `https://${username}.${m.domain}`;
+  }
+  return `https://${m.domain}`;
+}
+
 interface AppSwitcherProps {
   current?: string;
 }
 
 export function AppSwitcher({ current = 'notes' }: AppSwitcherProps) {
   const [open, setOpen] = useState(false);
+  const [username, setUsername] = useState<string | null>(null);
   const ref = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
@@ -83,6 +94,18 @@ export function AppSwitcher({ current = 'notes' }: AppSwitcherProps) {
     return () => document.removeEventListener('click', handleClick);
   }, []);
 
+  // Fetch current user's username for subdomain links
+  useEffect(() => {
+    fetch('/api/me')
+      .then((r) => r.json())
+      .then((data) => {
+        if (data.authenticated && data.user?.username) {
+          setUsername(data.user.username);
+        }
+      })
+      .catch(() => { /* not logged in */ });
+  }, []);
+
   const currentMod = MODULES.find((m) => m.id === current);
 
   // Group modules by category
@@ -140,7 +163,7 @@ export function AppSwitcher({ current = 'notes' }: AppSwitcherProps) {
                     } transition-colors`}
                   >
                     <a
-                      href={m.domain ? `https://${m.domain}` : '#'}
+                      href={getModuleUrl(m, username)}
                       className="flex items-center gap-2.5 flex-1 px-3.5 py-2 text-slate-200 no-underline min-w-0"
                       onClick={() => setOpen(false)}
                     >

src/components/SubdomainSession.tsx

@@ -0,0 +1,98 @@
+'use client';
+
+import { useEffect } from 'react';
+
+const TOKEN_KEY = 'encryptid_token';
+const USER_KEY = 'encryptid_user';
+const COOKIE_MAX_AGE = 7 * 24 * 60 * 60; // 7 days
+
+/**
+ * Cross-subdomain session sync.
+ *
+ * The EncryptID SDK stores tokens in localStorage (per-origin) and sets
+ * a cookie without a domain attribute (per-hostname). This means
+ * jeff.rnotes.online can't access rnotes.online's session.
+ *
+ * This component bridges that gap by:
+ * 1. Mirroring localStorage token to a cookie scoped to .rnotes.online
+ * 2. On subdomain load, restoring from the domain-wide cookie to localStorage
+ */
+function isRnotesDomain(): boolean {
+  if (typeof window === 'undefined') return false;
+  return window.location.hostname.endsWith('.rnotes.online') ||
+         window.location.hostname === 'rnotes.online';
+}
+
+function getCookieDomain(): string {
+  return '.rnotes.online';
+}
+
+function getDomainCookie(name: string): string | null {
+  if (typeof document === 'undefined') return null;
+  const match = document.cookie.match(new RegExp(`(?:^|;\\s*)${name}=([^;]*)`));
+  return match ? decodeURIComponent(match[1]) : null;
+}
+
+function setDomainCookie(name: string, value: string): void {
+  document.cookie = `${name}=${encodeURIComponent(value)};path=/;domain=${getCookieDomain()};max-age=${COOKIE_MAX_AGE};SameSite=Lax;Secure`;
+}
+
+function clearDomainCookie(name: string): void {
+  document.cookie = `${name}=;path=/;domain=${getCookieDomain()};max-age=0;SameSite=Lax;Secure`;
+}
+
+export function SubdomainSession() {
+  useEffect(() => {
+    if (!isRnotesDomain()) return;
+
+    // On mount: sync localStorage <-> domain cookie
+    const localToken = localStorage.getItem(TOKEN_KEY);
+    const cookieToken = getDomainCookie(TOKEN_KEY);
+
+    if (localToken && !cookieToken) {
+      // Have localStorage token but no domain cookie — set it
+      setDomainCookie(TOKEN_KEY, localToken);
+    } else if (!localToken && cookieToken) {
+      // On a subdomain with no localStorage but domain cookie exists — restore
+      localStorage.setItem(TOKEN_KEY, cookieToken);
+      // Also restore user info from cookie if available
+      const cookieUser = getDomainCookie(USER_KEY);
+      if (cookieUser) {
+        localStorage.setItem(USER_KEY, cookieUser);
+      }
+      // Reload to let EncryptIDProvider pick up the restored token
+      window.location.reload();
+      return;
+    } else if (localToken && cookieToken && localToken !== cookieToken) {
+      // Both exist but differ — localStorage wins (it's more recent)
+      setDomainCookie(TOKEN_KEY, localToken);
+    }
+
+    // Watch for localStorage changes (from EncryptID SDK login/logout)
+    function handleStorage(e: StorageEvent) {
+      if (e.key === TOKEN_KEY) {
+        if (e.newValue) {
+          setDomainCookie(TOKEN_KEY, e.newValue);
+        } else {
+          clearDomainCookie(TOKEN_KEY);
+          clearDomainCookie(USER_KEY);
+        }
+      }
+      if (e.key === USER_KEY && e.newValue) {
+        setDomainCookie(USER_KEY, e.newValue);
+      }
+    }
+
+    window.addEventListener('storage', handleStorage);
+
+    // Also sync user data to domain cookie
+    const localUser = localStorage.getItem(USER_KEY);
+    if (localUser) {
+      setDomainCookie(USER_KEY, localUser);
+    }
+
+    return () => window.removeEventListener('storage', handleStorage);
+  }, []);
+
+  return null; // render nothing
+}

src/lib/auth.ts

@@ -1,11 +1,13 @@
 import { getEncryptIDSession } from '@encryptid/sdk/server/nextjs';
 import { NextResponse } from 'next/server';
 import { prisma } from './prisma';
+import { getWorkspaceSlug } from './workspace';
 import type { User } from '@prisma/client';
 
 export interface AuthResult {
   user: User;
   did: string;
+  username: string | null;
 }
 
 const UNAUTHORIZED = NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
@@ -14,6 +16,7 @@ const UNAUTHORIZED = NextResponse.json({ error: 'Unauthorized' }, { status: 401
  * Get authenticated user from request, or null if not authenticated.
  * Upserts User in DB by DID (find-or-create).
  * On first user creation, auto-claims orphaned notebooks/notes.
+ * Auto-migrates unscoped notebooks to user's workspace.
  */
 export async function getAuthUser(request: Request): Promise<AuthResult | null> {
   const claims = await getEncryptIDSession(request);
@@ -55,7 +58,21 @@ export async function getAuthUser(request: Request): Promise<AuthResult | null>
     });
   }
 
-  return { user, did };
+  // Auto-migrate: assign unscoped notebooks owned by this user to their workspace
+  if (user.username) {
+    const workspaceSlug = user.username.toLowerCase().replace(/[^a-z0-9-]/g, '-');
+    await prisma.notebook.updateMany({
+      where: {
+        workspaceSlug: '',
+        collaborators: {
+          some: { userId: user.id, role: 'OWNER' },
+        },
+      },
+      data: { workspaceSlug },
+    });
+  }
+
+  return { user, did, username: user.username };
 }
 
 /**

src/lib/authFetch.ts

@@ -1,15 +1,23 @@
 const TOKEN_KEY = 'encryptid_token';
 
+function getCookieToken(): string | null {
+  if (typeof document === 'undefined') return null;
+  const match = document.cookie.match(/(?:^|;\s*)encryptid_token=([^;]*)/);
+  return match ? decodeURIComponent(match[1]) : null;
+}
+
 /**
  * Authenticated fetch wrapper.
- * Reads JWT from localStorage and adds Authorization header.
+ * Reads JWT from localStorage (primary) or domain cookie (fallback).
  * On 401, redirects to signin page.
  */
 export async function authFetch(
   url: string,
   options: RequestInit = {}
 ): Promise<Response> {
-  const token = typeof window !== 'undefined' ? localStorage.getItem(TOKEN_KEY) : null;
+  const token = typeof window !== 'undefined'
+    ? (localStorage.getItem(TOKEN_KEY) || getCookieToken())
+    : null;
 
   const headers = new Headers(options.headers);
   if (token) {

src/lib/workspace.ts

@@ -0,0 +1,10 @@
+import { headers } from 'next/headers';
+
+/**
+ * Get the current workspace slug from the request.
+ * Returns the subdomain (e.g. "jeff" from "jeff.rnotes.online") or "" for bare domain.
+ */
+export function getWorkspaceSlug(): string {
+  const h = headers();
+  return h.get('x-workspace-slug') || '';
+}

src/middleware.ts

@@ -9,17 +9,33 @@ export function middleware(request: NextRequest) {
 
   if (match && !RESERVED_SUBDOMAINS.has(match[1])) {
     const space = match[1];
-    const response = NextResponse.next();
+
+    // Clone headers and add workspace context for API routes
+    const requestHeaders = new Headers(request.headers);
+    requestHeaders.set('x-workspace-slug', space);
+
+    const response = NextResponse.next({
+      request: { headers: requestHeaders },
+    });
+
+    // Set cookie for client-side access
     response.cookies.set('rnotes-space', space, {
       path: '/',
       httpOnly: false,
       sameSite: 'lax',
       secure: true,
     });
+
     return response;
   }
 
-  return NextResponse.next();
+  // Bare domain: set empty workspace header
+  const requestHeaders = new Headers(request.headers);
+  requestHeaders.set('x-workspace-slug', '');
+
+  return NextResponse.next({
+    request: { headers: requestHeaders },
+  });
 }
 
 export const config = {