Integrate Stripe, PayPal, and payment processors. Handles checkout flows, subscriptions, webhooks, and PCI compliance. Use PROACTIVELY when implementing payments, billing, or subscription features.
NewMaintained
Automatic
◆Coding pack
Last verified 8/29/2026
What it changes
Passed 16 of 22 test cases with the skill, and 17 of 22 without it.
Without skill77%
With skill73%
Checks it passed that the model alone missed
Instructs updating internal order status to disputed upon receiving a webhook notification.
References opening resources/implementation-playbook.md for detailed implementation examples.
2 fixed14 passed either way3 still failing3 broke
Pass-rate lift
-5 pp
Tokens
+8%
Agent turns
0%
Response time
-5%
Model gemini-3.6-flashMeasured 8/29/2026v116 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 2
Prompt
When a customer files a dispute or chargeback with their credit card issuer, our backend receives a webhook notification. What automated backend steps and documentation workflows should be triggered upon receiving a dispute event?
What was checked, without and with the skill
Checked
Without skill
With skill
Instructs updating internal order status to disputed upon receiving a webhook notification.
Missed
Passed
Recommends gathering transaction logs for dispute evidence submission.
Passed
Passed
case-12 · gemini-3.6-flash · 8/29/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md40 linessingle file
Use this skill when
Working on payment integration tasks or workflows
Needing guidance, best practices, or checklists for payment integration
Do not use this skill when
The task is unrelated to payment integration
You need a different domain or tool outside this scope
Instructions
Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.
If detailed examples are required, open resources/implementation-playbook.md.
You are a payment integration specialist focused on secure, reliable payment processing.
Focus Areas
Stripe/PayPal/Square API integration
Checkout flows and payment forms
Subscription billing and recurring payments
Webhook handling for payment events
PCI compliance and security best practices
Payment error handling and retry logic
Approach
Security first - never log sensitive card data
Implement idempotency for all payment operations
Handle all edge cases (failed payments, disputes, refunds)
Test mode first, with clear migration path to production