{"agent":"claude","input":"Add Stripe Checkout to this Django app for one fixed-price product. Read the settings, urls.py and AGENTS.md first and follow the project's patterns. Add an endpoint that creates a Checkout Session and redirects to it, a success page, and a webhook endpoint that verifies the Stripe-Signature header with stripe.Webhook.construct_event, returns 400 on a bad signature, and records checkout.session.completed once per session id in a model. Read STRIPE_SECRET_KEY, STRIPE_WEBHOOK_SECRET and STRIPE_PRICE_ID from the environment and add the names to .env.example. Add the stripe package and the migration. Write tests that sign webhook payloads with a test secret, and if a Stripe test-mode key is available, run the app with stripe listen forwarding to the webhook and stripe trigger checkout.session.completed. Run manage.py check, makemigrations --check, the test suite and the linters, and open a pull request with the test output and how to test it.","resources":[{"url":"https://github.com/your-org/your-app"}]}