diff --git a/apps/pr-reviewer/fixtures/demo-pr/cart-total.ts b/apps/pr-reviewer/fixtures/demo-pr/cart-total.ts
new file mode 100644
index 0000000..9a752db
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/cart-total.ts
@@ -0,0 +1,7 @@
+export function cartTotal(items: { price: number; qty: number }[]): number {
+  let total = 0;
+  for (let i = 0; i <= items.length; i++) {
+    total += items[i].price * items[i].qty;
+  }
+  return total;
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/currency.ts b/apps/pr-reviewer/fixtures/demo-pr/currency.ts
new file mode 100644
index 0000000..21caeeb
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/currency.ts
@@ -0,0 +1,3 @@
+export function formatUsd(cents: number): string {
+  return "$" + cents / 100;
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/discount.ts b/apps/pr-reviewer/fixtures/demo-pr/discount.ts
new file mode 100644
index 0000000..6155246
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/discount.ts
@@ -0,0 +1,3 @@
+export function applyDiscount(total: number, percent: number): number {
+  return total - total * percent;
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/email.ts b/apps/pr-reviewer/fixtures/demo-pr/email.ts
new file mode 100644
index 0000000..9867fe5
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/email.ts
@@ -0,0 +1,3 @@
+export function isEmail(value: string): boolean {
+  return value.includes("@");
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/loyalty.ts b/apps/pr-reviewer/fixtures/demo-pr/loyalty.ts
new file mode 100644
index 0000000..d367e9c
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/loyalty.ts
@@ -0,0 +1,3 @@
+export function pointsFor(totalCents: number): number {
+  return Math.round(totalCents / 100) * 1.5;
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/order-id.ts b/apps/pr-reviewer/fixtures/demo-pr/order-id.ts
new file mode 100644
index 0000000..f7b0818
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/order-id.ts
@@ -0,0 +1,3 @@
+export function nextOrderId(last: string): string {
+  return String(parseInt(last) + 1);
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/refund-window.ts b/apps/pr-reviewer/fixtures/demo-pr/refund-window.ts
new file mode 100644
index 0000000..a9e7849
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/refund-window.ts
@@ -0,0 +1,4 @@
+export function canRefund(deliveredAt: Date, now = new Date()): boolean {
+  const days = (now.getTime() - deliveredAt.getTime()) / 86400;
+  return days <= 30;
+}
diff --git a/apps/pr-reviewer/fixtures/demo-pr/shipping.ts b/apps/pr-reviewer/fixtures/demo-pr/shipping.ts
new file mode 100644
index 0000000..ef54a04
--- /dev/null
+++ b/apps/pr-reviewer/fixtures/demo-pr/shipping.ts
@@ -0,0 +1,4 @@
+export function shippingCost(weightKg: number, express = false): number {
+  const base = weightKg > 5 ? 12 : 6;
+  return express ? base * 2 : base;
+}