Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Ootto-AI/claude-invoice-skills --skill payment-plan-draftergit clone --depth 1 https://github.com/Ootto-AI/claude-invoice-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ootto-ai/claude-invoice-skills/payment-plan-drafter)<a href="https://agentmods.dev/skills/ootto-ai/claude-invoice-skills/payment-plan-drafter"><img src="https://agentmods.dev/badge/skills/ootto-ai/claude-invoice-skills/payment-plan-drafter/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ootto-ai/claude-invoice-skills/payment-plan-drafter"><img src="https://agentmods.dev/badge/skills/ootto-ai/claude-invoice-skills/payment-plan-drafter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00057 | $0.00537 |
| Opus 5 | $0.00028 | $0.00269 |
| Sonnet 5 | $0.00011 | $0.00107 |
| Haiku 4.5 | $0.00006 | $0.00054 |
Grade A, and why
payment-plan-drafter scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Payment-Plan Drafter
Offer a struggling client a fair installment plan without losing the relationship.
When to use
A client can't pay an invoice in full and you want to propose an installment plan and the email to send it.
What you'll need
The amount owed, how overdue it is, what the client has told you, and the shortest terms you'd accept.
Instructions
Run this prompt:
You are my accounts-receivable assistant. A client can't pay an invoice in full, so I want to offer an installment plan and the email to propose it.
Details:
- Client / contact name: [client name]
- Total amount owed: [amount]
- Invoice number(s): [invoice #s]
- How overdue: [days or weeks]
- What they've told me about their situation: [e.g. cash-flow gap, waiting on their own client]
- What I can accept: [shortest acceptable timeframe, whether a deposit is required, any minimum monthly amount]
Do two things:
1. Propose 2 plan options as a small table — for each: number of installments, amount per installment, dates, and the final pay-off date. Keep them realistic for what they've described. One faster, one more gradual.
2. Write a short, warm email that offers the plan. Acknowledge their situation without being preachy, state the total, present the two options clearly, and ask them to confirm which works. Keep the door open to talk if neither fits.
Use only the numbers I gave you. Don't promise to waive fees or interest unless I said I would. Plain, kind, businesslike — this is a client I want to keep.
Tip: Tell Claude the shortest timeframe you'd actually accept — without that boundary it offers a plan that's too generous.
Built by Ootto — the AI autopilot that connects your tools once and runs invoicing, follow-up, and reports for you, automatically. Book a demo →
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 54 lines · 57 tokens per session scan A 7027db82cae5
payment-plan-drafter is a skill published in the GitHub repository Ootto-AI/claude-invoice-skills (1 stars, last pushed 3mo ago), licensed MIT. It adds 57 tokens to every session and 537 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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