diff --git a/apps/web/components/onboarding/onboarding-flow.tsx b/apps/web/components/onboarding/onboarding-flow.tsx
new file mode 100644
index 0000000..0c60f72
--- /dev/null
+++ b/apps/web/components/onboarding/onboarding-flow.tsx
@@ -0,0 +1,151 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetFooter,
+  SheetHeader,
+  SheetTitle,
+} from '@/components/ui/sheet';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { toast } from 'sonner';
+import { Rocket, ListTodo, Flame } from 'lucide-react';
+
+const ONBOARDED_KEY = 'pe_onboarded';
+
+interface OnboardingFlowProps {
+  onComplete: () => void;
+}
+
+export function OnboardingFlow({ onComplete }: OnboardingFlowProps) {
+  const [open, setOpen] = useState(false);
+  const [step, setStep] = useState(0);
+  const [domainName, setDomainName] = useState('');
+
+  useEffect(() => {
+    if (typeof window === 'undefined') return;
+    const onboarded = localStorage.getItem(ONBOARDED_KEY);
+    if (!onboarded) {
+      setOpen(true);
+    }
+  }, []);
+
+  function handleDismiss() {
+    localStorage.setItem(ONBOARDED_KEY, 'true');
+    setOpen(false);
+    onComplete();
+  }
+
+  async function handleCreateDomain() {
+    if (!domainName.trim()) {
+      toast.error('Please enter a domain name');
+      return;
+    }
+    try {
+      const res = await fetch('/api/domains', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ name: domainName.trim() }),
+      });
+      if (!res.ok) throw new Error('Failed to create domain');
+      toast.success('Domain created!');
+      setStep(1);
+    } catch {
+      toast.error('Failed to create domain');
+    }
+  }
+
+  const steps = [
+    {
+      title: 'Pick your primary domain',
+      description: 'A domain is your workspace — a container for tasks, habits, and projects.',
+      icon: <Rocket className="h-8 w-8 text-primary" />,
+      content: (
+        <div className="space-y-3">
+          <Label htmlFor="domain-name">Domain name</Label>
+          <Input
+            id="domain-name"
+            value={domainName}
+            onChange={(e) => setDomainName(e.target.value)}
+            placeholder="e.g. Personal, Work, Side Project"
+            autoFocus
+          />
+          <Button onClick={handleCreateDomain} className="w-full">
+            Create domain
+          </Button>
+        </div>
+      ),
+    },
+    {
+      title: 'Create your first task',
+      description: 'Tasks are the building blocks of your workflow. Create one to get started.',
+      icon: <ListTodo className="h-8 w-8 text-primary" />,
+      content: (
+        <div className="space-y-3">
+          <p className="text-sm text-muted-foreground">
+            Use the <kbd className="rounded border bg-muted px-1 font-mono text-xs">+</kbd> button in the top bar or press{' '}
+            <kbd className="rounded border bg-muted px-1 font-mono text-xs">C</kbd> on the Tasks page to create a new task.
+          </p>
+          <Button onClick={() => setStep(2)} className="w-full">
+            Got it, next step
+          </Button>
+        </div>
+      ),
+    },
+    {
+      title: 'Add a habit',
+      description: 'Build streaks and track progress on things you do regularly.',
+      icon: <Flame className="h-8 w-8 text-primary" />,
+      content: (
+        <div className="space-y-3">
+          <p className="text-sm text-muted-foreground">
+            Head to the Habits page and click <strong>New habit</strong> to start tracking something daily or weekly.
+          </p>
+          <Button onClick={handleDismiss} className="w-full">
+            Done — start using Project E
+          </Button>
+        </div>
+      ),
+    },
+  ];
+
+  const current = steps[step];
+
+  return (
+    <Sheet open={open} onOpenChange={(v) => { if (!v) handleDismiss(); }}>
+      <SheetContent side="bottom" className="sm:max-w-md sm:mx-auto sm:rounded-t-xl">
+        <SheetHeader className="mb-4">
+          <div className="flex items-center gap-3">
+            {current.icon}
+            <div>
+              <SheetTitle>{current.title}</SheetTitle>
+              <SheetDescription>{current.description}</SheetDescription>
+            </div>
+          </div>
+        </SheetHeader>
+
+        {current.content}
+
+        <SheetFooter className="mt-6 flex items-center justify-between">
+          <div className="flex gap-1">
+            {steps.map((_, i) => (
+              <div
+                key={i}
+                className={`h-1.5 w-6 rounded-full transition-colors ${
+                  i === step ? 'bg-primary' : 'bg-muted'
+                }`}
+              />
+            ))}
+          </div>
+          <Button variant="ghost" size="sm" onClick={handleDismiss}>
+            Skip onboarding
+          </Button>
+        </SheetFooter>
+      </SheetContent>
+    </Sheet>
+  );
+}