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billing-automation

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Build automated billing systems for recurring payments, invoicing, subscription lifecycle, and dunning management. Use when implementing subscription billing, automating invoicing, or managing recurring payment systems.

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How to use this skill

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  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/Dokhacgiakhoa/Agent-skills-setup-for-AntiGravity/blob/HEAD/tests/manual-repair-test/.agent/skills/billing-automation/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/billing-automation/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

Billing Automation

Master automated billing systems including recurring billing, invoice generation, dunning management, proration, and tax calculation.

Use this skill when

  • Implementing SaaS subscription billing
  • Automating invoice generation and delivery
  • Managing failed payment recovery (dunning)
  • Calculating prorated charges for plan changes
  • Handling sales tax, VAT, and GST
  • Processing usage-based billing
  • Managing billing cycles and renewals

Do not use this skill when

  • You only need a one-off invoice or manual billing
  • The task is unrelated to billing or subscriptions
  • You cannot change pricing, plans, or billing flows

Instructions

  • Define plans, pricing, billing intervals, and proration rules.
  • Map subscription lifecycle states and renewal/cancellation behavior.
  • Implement invoicing, payments, retries, and dunning workflows.
  • Model taxes and compliance requirements per region.
  • Validate with sandbox payments and reconcile ledger outputs.
  • If detailed templates are required, open resources/implementation-playbook.md.

Safety

  • Do not charge real customers in testing environments.
  • Verify tax handling and compliance obligations before production rollout.

Resources

  • resources/implementation-playbook.md for detailed patterns, checklists, and examples.

🧠 Knowledge Modules (Fractal Skills)

1. implementation-playbook