How do I use Billing Automation on Zeplik?

Sign in to Zeplik and ask in plain language, or type /billing-automation in any chat to invoke it directly. The skill applies its method and returns a result you can refine in the same conversation.

Which AI model does the Billing Automation skill use?

Any model you choose. Zeplik works across every model in one chat, so the Billing Automation skill runs on your preferred model for the task.

Where does the Billing Automation skill come from?

The Billing Automation skill is adapted from the open-source wshobson/agents project (MIT) and tuned to run natively on Zeplik. The original source is linked on this page.

How much does the Billing Automation skill cost?

Using the skill is free to start. You only spend Zeplik credits when the assistant runs, and new accounts begin with free credits.

Billing Automation

Software development skill, available on Zeplik

Billing Automation is a ready-to-run software development skill on Zeplik. Implementing subscription billing logic in code: invoicing, dunning, proration, usage metering, billing cycles. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.

The Billing Automation skill loads automatically when your request matches it, or you can invoke it directly by typing /billing-automation in any chat. It works with attachments, connectors, and any model that supports the task, so you get the same expert method every time without setting anything up.

What the Billing Automation skill can do

Model subscription lifecycle states with auditable transitions
Build dunning workflows for failed payment recovery
Calculate prorated charges for plan and seat changes
Generate recurring invoices across billing cycle intervals

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Pick a prompt to open it in the Zeplik app. If you are not signed in yet, your prompt is waiting for you the moment you do.

How the Billing Automation skill works

/billing-automation

Design and implement automated billing systems: recurring billing, invoice generation, dunning management, proration, and tax calculation. This skill covers the billing domain logic itself; when the user needs Stripe-specific endpoints, webhooks, or SDK usage, hand off to stripe-integration.

When to Use

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

Core Concepts

1. Billing Cycles

Common intervals:

Monthly (most common for SaaS)
Annual (discounted long-term)
Quarterly
Weekly
Custom (usage-based, per-seat)

2. Subscription States

trial -> active -> past_due -> canceled
                -> paused -> resumed

Model the full lifecycle explicitly; every transition should be an auditable event.

3. Dunning Management

Automated process to recover failed payments through:

Retry schedules
Customer notifications
Grace periods
Account restrictions

4. Proration

Adjusting charges when:

Upgrading/downgrading mid-cycle
Adding/removing seats
Changing billing frequency

Quick Start

from billing import BillingEngine, Subscription

# Initialize billing engine
billing = BillingEngine()

# Create subscription
subscription = billing.create_subscription(
    customer_id="cus_123",
    plan_id="plan_pro_monthly",
    billing_cycle_anchor=datetime.now(),
    trial_days=14
)

# Process billing cycle
billing.process_billing_cycle(subscription.id)

Detailed Patterns and Worked Examples

Detailed pattern documentation (recurring billing engines, dunning schedulers, proration math, invoice generation, tax handling) lives in references/details.md. Read that file when the navigation tier above is insufficient.

Usage

/billing-automation $ARGUMENTS

How to use the Billing Automation skill

Sign in to Zeplik
Create a free Zeplik account or sign in. New accounts start with free credits, so you can try the Billing Automation skill right away.
Describe your software development task
Ask in plain language, or type /billing-automation to invoke the skill directly. Zeplik recognizes the Billing Automation skill and applies its method.
Review and refine the result
Zeplik returns a clear, structured answer. Ask follow-ups in the same chat to refine it or take the next step.

Source and credit

Author: wshobson
License: MIT

Adapted from the open-source wshobson/agents project and tuned to run natively on Zeplik. View source on GitHub.

Frequently asked questions

What is the Billing Automation skill?: Billing Automation is a ready-to-run software development skill on Zeplik. Implementing subscription billing logic in code: invoicing, dunning, proration, usage metering, billing cycles. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
How do I use Billing Automation on Zeplik?: Sign in to Zeplik and ask in plain language, or type /billing-automation in any chat to invoke it directly. The skill applies its method and returns a result you can refine in the same conversation.
Which AI model does the Billing Automation skill use?: Any model you choose. Zeplik works across every model in one chat, so the Billing Automation skill runs on your preferred model for the task.
Where does the Billing Automation skill come from?: The Billing Automation skill is adapted from the open-source wshobson/agents project (MIT) and tuned to run natively on Zeplik. The original source is linked on this page.
How much does the Billing Automation skill cost?: Using the skill is free to start. You only spend Zeplik credits when the assistant runs, and new accounts begin with free credits.

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