diff --git a/README.md b/README.md
index 8204dac5..53252c20 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,7 @@ By adding selected `.mdc` files to `.cursor/rules/`, you can use these rules dir
 
 ### Backend and Full-Stack
 
+- [Anthropic Claude API (TypeScript, Next.js)](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/anthropic-claude-api-typescript.mdc) - Claude API integration with streaming responses, tool use, model selection guide, and production-grade error handling with exponential backoff.
 - [Cloudflare Workers (Hono, Angular)](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/cloudflare-workers-hono-angular-saas-cursorrules-prompt-file.mdc) - Full-stack SaaS applications on Cloudflare Workers with Hono APIs, Angular frontends, typed RPC, D1/Neon, and production observability.
 - [Convex Best Practices](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/convex-cursorrules-prompt-file.mdc) - Convex development with best practices.
 - [Deno Integration](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/deno-integration-techniques-cursorrules-prompt-fil.mdc) - Deno development with integration techniques.
@@ -208,6 +209,7 @@ By adding selected `.mdc` files to `.cursor/rules/`, you can use these rules dir
 - [Snowflake Cortex AI](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/snowflake-cortex-ai-cursorrules-prompt-file.mdc) - AI_COMPLETE, AI_CLASSIFY, AI_EXTRACT, Cortex Search, and RAG applications.
 - [Snowflake Data Engineering](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/snowflake-data-engineering-cursorrules-prompt-file.mdc) - Snowflake SQL, data pipelines (Dynamic Tables, Streams, Tasks, Snowpipe), semi-structured data, Snowflake PostgreSQL, and cost optimization.
 - [Snowflake Snowpark Python & dbt](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/snowflake-snowpark-dbt-cursorrules-prompt-file.mdc) - Snowpark Python (DataFrames, UDFs, stored procedures) and dbt with the Snowflake adapter.
+- [Stripe (Next.js, TypeScript)](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/stripe-integration-nextjs-typescript.mdc) - Secure checkout sessions, idempotent webhook verification with signature validation, subscription lifecycle handling, and customer portal.
 - [TypeScript (Axios)](https://github.com/PatrickJS/awesome-cursorrules/blob/main/rules/typescript-axios-cursorrules-prompt-file.mdc) - TypeScript development with Axios integration.
 
 ### Testing
@@ -322,6 +324,7 @@ By adding selected `.mdc` files to `.cursor/rules/`, you can use these rules dir
 
 - [CursorList](https://cursorlist.com)
 - [CursorDirectory](https://cursor.directory/)
+- [Cursor Rules & AI Coding Config Pack](https://moukie76.github.io/cursor-rules-free/) - 27 production-ready rules for 16 stacks: Next.js, React, Python FastAPI, Go, Stripe, Anthropic Claude, Tailwind, Docker, and more.
 
 ## How to Use
 
diff --git a/rules/anthropic-claude-api-typescript.mdc b/rules/anthropic-claude-api-typescript.mdc
new file mode 100644
index 00000000..71be09e0
--- /dev/null
+++ b/rules/anthropic-claude-api-typescript.mdc
@@ -0,0 +1,115 @@
+---
+description: Anthropic Claude API integration with streaming responses, tool use, and production-grade error handling for TypeScript and Next.js
+globs: **/claude.ts, **/anthropic.ts, **/api/chat/route.ts, **/*.ts
+alwaysApply: false
+---
+
+# Anthropic Claude API — TypeScript / Next.js
+
+## Client Setup
+```ts
+import Anthropic from "@anthropic-ai/sdk"
+
+// Singleton — reuse across requests
+const anthropic = new Anthropic({
+  apiKey: process.env.ANTHROPIC_API_KEY,
+})
+```
+
+## Basic Message
+```ts
+const message = await anthropic.messages.create({
+  model: "claude-opus-4-6",
+  max_tokens: 1024,
+  messages: [
+    { role: "user", content: "Explain this code: ..." }
+  ],
+})
+
+const text = message.content[0].type === "text" ? message.content[0].text : ""
+```
+
+## Streaming (Next.js Edge)
+```ts
+// app/api/chat/route.ts
+import Anthropic from "@anthropic-ai/sdk"
+
+export const runtime = "edge"
+
+export async function POST(req: Request) {
+  const { messages } = await req.json()
+
+  const anthropic = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY })
+
+  const stream = anthropic.messages.stream({
+    model: "claude-opus-4-6",
+    max_tokens: 2048,
+    system: "You are a helpful assistant.",
+    messages,
+  })
+
+  return new Response(stream.toReadableStream(), {
+    headers: { "Content-Type": "text/event-stream" },
+  })
+}
+```
+
+## Tool Use
+```ts
+const response = await anthropic.messages.create({
+  model: "claude-opus-4-6",
+  max_tokens: 1024,
+  tools: [{
+    name: "get_weather",
+    description: "Get current weather for a location",
+    input_schema: {
+      type: "object",
+      properties: {
+        location: { type: "string", description: "City name" },
+      },
+      required: ["location"],
+    },
+  }],
+  messages: [{ role: "user", content: "What is the weather in Paris?" }],
+})
+```
+
+## System Prompts
+```ts
+const system = `You are [role].
+
+Your task: [specific task]
+
+Rules:
+- [rule 1]
+- [rule 2]
+
+Output format: [format]`
+```
+
+## Error Handling
+```ts
+try {
+  const message = await anthropic.messages.create(...)
+} catch (err) {
+  if (err instanceof Anthropic.APIStatusError) {
+    if (err.status === 429) { /* rate limited — backoff and retry */ }
+    if (err.status === 529) { /* overloaded — retry with exponential backoff */ }
+  }
+  throw err
+}
+```
+
+## Model Selection
+- claude-haiku-4-5-20251001: fast and cheap, good for classification, short tasks
+- claude-sonnet-4-6: balanced speed/intelligence for most tasks
+- claude-opus-4-6: maximum intelligence for complex reasoning
+
+## Rules
+- Always set max_tokens explicitly — the default may truncate responses
+- Use a singleton client instance, not a new one per request
+- Handle 429 (rate limit) and 529 (overloaded) with exponential backoff
+- Monitor usage.input_tokens + usage.output_tokens per request for cost control
+- Trim conversation history before sending — avoid token bloat on long sessions
+- Never hardcode API keys — use process.env.ANTHROPIC_API_KEY
+- Do not use deprecated claude-1 or claude-2 model IDs
diff --git a/rules/stripe-integration-nextjs-typescript.mdc b/rules/stripe-integration-nextjs-typescript.mdc
new file mode 100644
index 00000000..8e1d1c34
--- /dev/null
+++ b/rules/stripe-integration-nextjs-typescript.mdc
@@ -0,0 +1,109 @@
+---
+description: Secure Stripe integration with typed checkout sessions, idempotent webhook verification, and subscription lifecycle handling in Next.js TypeScript
+globs: **/stripe.ts, **/webhook/route.ts, **/checkout/route.ts, **/*.ts
+alwaysApply: false
+---
+
+# Stripe Integration — Next.js TypeScript
+
+## Client Setup
+```ts
+// lib/stripe.ts
+import Stripe from "stripe"
+
+export const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!, {
+  apiVersion: "2024-12-18.acacia",
+  typescript: true,
+})
+```
+
+## Checkout Session
+```ts
+export async function createCheckoutSession({
+  priceId,
+  userId,
+  successUrl,
+  cancelUrl,
+}: {
+  priceId: string
+  userId: string
+  successUrl: string
+  cancelUrl: string
+}) {
+  return stripe.checkout.sessions.create({
+    mode: "subscription",
+    payment_method_types: ["card"],
+    line_items: [{ price: priceId, quantity: 1 }],
+    success_url: successUrl,
+    cancel_url: cancelUrl,
+    metadata: { userId },
+    subscription_data: {
+      metadata: { userId },
+    },
+  })
+}
+```
+
+## Webhooks — Critical Patterns
+```ts
+// app/api/stripe/webhook/route.ts
+import { headers } from "next/headers"
+
+export async function POST(req: Request) {
+  const body = await req.text()
+  const signature = headers().get("stripe-signature")!
+
+  let event: Stripe.Event
+  try {
+    event = stripe.webhooks.constructEvent(
+      body,
+      signature,
+      process.env.STRIPE_WEBHOOK_SECRET!
+    )
+  } catch {
+    return new Response("Webhook signature verification failed", { status: 400 })
+  }
+
+  switch (event.type) {
+    case "checkout.session.completed": {
+      const session = event.data.object as Stripe.Checkout.Session
+      await handleCheckoutComplete(session)
+      break
+    }
+    case "customer.subscription.deleted": {
+      const sub = event.data.object as Stripe.Subscription
+      await handleSubscriptionCancelled(sub)
+      break
+    }
+  }
+
+  return new Response("ok")
+}
+```
+
+## Customer Portal
+```ts
+export async function createPortalSession(customerId: string, returnUrl: string) {
+  return stripe.billingPortal.sessions.create({
+    customer: customerId,
+    return_url: returnUrl,
+  })
+}
+```
+
+## Environment Variables
+```env
+STRIPE_SECRET_KEY=sk_live_...
+NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=pk_live_...
+STRIPE_WEBHOOK_SECRET=whsec_...
+NEXT_PUBLIC_STRIPE_PRICE_ID=price_...
+```
+
+## Rules
+- Webhook body: always read as raw text (req.text()), never parse as JSON before constructEvent
+- Idempotent handlers: webhooks can fire multiple times — check if already processed before writing to DB
+- Fast response: return 200 immediately, offload heavy work to a queue if needed
+- Metadata: always attach userId to both metadata and subscription_data.metadata
+- Never trust client-submitted amounts — verify server-side via webhook
+- Never store raw card data — delegate PCI scope to Stripe
+- Never skip signature verification — call constructEvent on every webhook