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 openaccountant/skills --skill invoice-aginggit clone --depth 1 https://github.com/openaccountant/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/openaccountant/skills/invoice-aging)<a href="https://agentmods.dev/skills/openaccountant/skills/invoice-aging"><img src="https://agentmods.dev/badge/skills/openaccountant/skills/invoice-aging/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/openaccountant/skills/invoice-aging"><img src="https://agentmods.dev/badge/skills/openaccountant/skills/invoice-aging.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 | $0.00014 | $0.00756 |
| Opus 5 | $0.00007 | $0.00378 |
| Sonnet 5 | $0.00003 | $0.00151 |
| Haiku 4.5 | $0.00001 | $0.00076 |
Grade A, and why
invoice-aging 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Invoice Aging Report
Overview
Analyze accounts receivable by sorting outstanding invoices into aging buckets: Current (0-30 days), 31-60 days, 61-90 days, and 90+ days. Identifies clients with chronically late payments and calculates total exposure.
Wilson Tools Used
transaction_search— find payment transactions matched to known clients or invoice references, identify gaps where expected payments are missing
Workflow
- Ask for the list of outstanding invoices (client name, invoice amount, invoice date, due date) or ask the user to describe their invoicing pattern.
- Use
transaction_searchto find all incoming payments from each client over the past 6 months. - Cross-reference received payments against known invoice amounts and dates.
- For each unpaid or partially paid invoice, calculate days outstanding from the due date.
- Sort into aging buckets:
ACCOUNTS RECEIVABLE AGING — as of [Date]
═══════════════════════════════════════════════════════
Client Current 31-60 61-90 90+ Total
────────────────────────────────────────────────────────
Acme Corp $2,500 — — — $2,500
Beta LLC — $1,800 — — $1,800
Gamma Inc — — $3,200 — $3,200
Delta Co — — — $5,000 $5,000
────────────────────────────────────────────────────────
TOTALS $2,500 $1,800 $3,200 $5,000 $12,500
% of Total 20.0% 14.4% 25.6% 40.0% 100%
═══════════════════════════════════════════════════════
- Flag any client with invoices in the 90+ bucket.
- Calculate weighted average days outstanding.
- Recommend follow-up actions: send reminder (31-60), escalate (61-90), consider collections (90+).
Without Wilson
- Export your invoice list from your invoicing tool (QuickBooks: Reports > Customers & Receivables > A/R Aging Summary; FreshBooks: Reports > Accounts Aging; Wave: Reports > Aged Receivables).
- If no invoicing tool, create a spreadsheet with columns: Client, Invoice #, Amount, Invoice Date, Due Date, Paid Date, Paid Amount.
- Calculate days outstanding:
=IF(PaidDate="", TODAY()-DueDate, PaidDate-DueDate). - Assign buckets with:
=IF(DaysOutstanding<=0,"Current",IF(DaysOutstanding<=30,"Current",IF(DaysOutstanding<=60,"31-60",IF(DaysOutstanding<=90,"61-90","90+")))). - Pivot table: Rows = Client, Columns = Bucket, Values = Sum of Amount.
- For weighted average:
=SUMPRODUCT(Amount,DaysOutstanding)/SUM(Amount).
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.
- 9d ago First seen · 53 lines · 14 tokens per session scan A d95558f61e38
invoice-aging is a skill published in the GitHub repository openaccountant/skills (67 stars, last pushed 5mo ago), licensed MIT. It adds 14 tokens to every session and 756 once invoked, about $0.0001 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 2026-08-30.
Other skills, from other repositories
tax-calculator
Calculate tax implications of trades and generate tax reports.
jangbu-import
A data-import workflow for turning bank files, card records, spreadsheets, receipts, tax invoices, and statement PDFs into a standard set of 13 transaction fields. OCR, or optical character recognition, is used to read information from document images and PDFs.
jangbu-connect
A setup guide for connecting Korean tax, bank, card, and social-insurance data through CODEF, an external API service. It explains how users obtain their own CODEF credentials and store them locally.
jangbu-tax
A financial-reporting tool that summarizes categorized transactions into a profit-and-loss statement and a simplified balance sheet. A profit-and-loss statement covers income and expenses over a period; a balance sheet shows assets, liabilities, and equity at a date.
accountant-expert
Expert-level accounting, tax, financial reporting, and accounting systems. Use when the user mentions accounting, tax, financial reporting, GAAP, or IFRS, or when the task involves Accounting Principles, Financial Statements, Tax & Compliance, or Accounting Systems.
jaz-recipes
Use this skill when modeling complex multi-step accounting transactions — anything that spans multiple periods, involves changing amounts, or requires linked entries. Covers 16 IFRS-compliant recipes (prepaid amortization, deferred revenue, loans, IFRS 16 leases, hire purchase, fixed deposits, asset disposal, FX…