Does this skill work with any tech stack?

While the reference implementation is based on Next.js and PostgreSQL, the skill analyzes your project structure (CLAUDE.md, package.json, etc.) and adapts the code for frameworks like Spring Boot, NestJS, and FastAPI.

How does the module handle payment security?

It implements industry standards including AES-256 encryption for billing keys, HMAC signature verification for webhooks, and follows PCI DSS principles for sensitive data handling.

Can it handle complex billing scenarios like plan upgrades?

Yes, the module includes a built-in proration utility that calculates price differences and credit adjustments when a user switches plans in the middle of a billing cycle.

What is the Dunning manager feature?

The Dunning manager is an automated system that handles failed payments by executing a multi-step retry strategy and notifying users before suspending their subscription.

Which Payment Gateways (PG) does this module support?

The module includes reference implementations for Toss Payments and KCP, but uses a PG-agnostic abstraction layer that allows easy adaptation to Stripe, PayPal, or other providers.

ASTRA Subscription Payment Module

Name: ASTRA Subscription Payment Module
Author: ASTRA-TECHNOLOGY-COMPANY-LIMITED

byASTRA-TECHNOLOGY-COMPANY-LIMITED

0•

E-commerce Solutions

Automates the end-to-end implementation of robust subscription payment systems, including PG integration, dunning strategies, and credit management.

The ASTRA Subscription Payment Module is a comprehensive Claude Code skill designed to fast-track the development of financial infrastructure in SaaS applications. It automatically executes the entire pipeline from reference design and blueprinting to full-stack implementation and testing. By providing a PG-agnostic abstraction layer, it handles complex billing logic such as proration, automated dunning retries, AES-256 billing key encryption, and credit-based usage tracking. Whether you are using Next.js with Drizzle or Spring Boot with JPA, this skill adapts to your technology stack to deliver production-ready payment workflows including webhooks and scheduled renewals.

Key Features

01End-to-end UI generation for pricing tables, billing methods, and invoice history

02Complete subscription lifecycle management including proration, pausing, and plan changes

03Advanced credit management system with atomic balance processing and expiration logic

04Multi-PG integration supporting Toss Payments and KCP with a provider-agnostic abstraction layer

050 GitHub stars

06Automated dunning system with 4-step retry strategies for failed transactions

Use Cases

01Rapidly bootstrapping a SaaS billing system with complex subscription tiers

02Implementing secure, encrypted billing key storage and webhook verification

03Automating credit-based usage and balance adjustments for workspace memberships

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add astra-technology-company-limited/astra-methodology payment-module

For use in Claude.ai and ChatGPT

Key Features

01End-to-end UI generation for pricing tables, billing methods, and invoice history

02Complete subscription lifecycle management including proration, pausing, and plan changes

03Advanced credit management system with atomic balance processing and expiration logic

04Multi-PG integration supporting Toss Payments and KCP with a provider-agnostic abstraction layer

050 GitHub stars

06Automated dunning system with 4-step retry strategies for failed transactions

Use Cases

01Rapidly bootstrapping a SaaS billing system with complex subscription tiers

02Implementing secure, encrypted billing key storage and webhook verification

03Automating credit-based usage and balance adjustments for workspace memberships