invoice-and-payment-tracker-summary

invoice-and-payment-tracker-summary is a skill for Claude Code, Codex from KirKruglov/claude-skills-kit. It costs 74 tokens per session (2,276 once invoked), scanned A, original, MIT.

A calculator and report builder for invoice payment status and overdue amounts, including how long each unpaid invoice has been outstanding.

In plain words
What is it for?
Use it to classify paid and overdue invoices, group them by age, compare client balances, and create a prioritized follow-up list.
Why use it?
It makes a pasted invoice list easier to reconcile by client and highlights which unpaid items need attention.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it to classify paid and overdue invoices, group them by age, compare client balances, and create a prioritized follow-up list.

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Install with agentmods
npx agentmods add skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary
Install

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.

Any agent
npx skills add KirKruglov/claude-skills-kit --skill invoice-and-payment-tracker-summary
Clone the repo
git clone --depth 1 https://github.com/KirKruglov/claude-skills-kit

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for invoice-and-payment-tracker-summary

README.md
[![agentmods](https://agentmods.dev/badge/skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary/github.svg)](https://agentmods.dev/skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary)
Your own site
<a href="https://agentmods.dev/skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary"><img src="https://agentmods.dev/badge/skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary/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.

agentmods 80×15 button for invoice-and-payment-tracker-summary

Your own site · 80×15
<a href="https://agentmods.dev/skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary"><img src="https://agentmods.dev/badge/skills/kirkruglov/claude-skills-kit/invoice-and-payment-tracker-summary.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,276 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00074 $0.02276
Opus 5 $0.00037 $0.01138
Sonnet 5 $0.00015 $0.00455
Haiku 4.5 $0.00007 $0.00228

Measured 12d ago against content hash d4ec2d675821, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

invoice-and-payment-tracker-summary 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.

skills/finance-and-billing/invoice-and-payment-tracker-summary/SKILL.md · 189 lines

How it starts

The opening of the file, as written. The whole thing — 189 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Invoice & Payment Tracker Summary

This skill assembles an invoice aging summary from a pasted list of invoices or payments. It classifies each invoice by payment status, calculates overdue aging, builds a per-client reconciliation cross-section, and generates a prioritised "needs action" list — with no accounting SaaS or integrations required.

Input:

  • Pasted invoice or payment list (markdown table, CSV, plain text list, or free-form)
  • Optional: payment terms (default: net 30), report date, currency label

Output:

  • Single markdown document with three sections: Aging Summary / Per-Client Reconciliation / Needs Action

Language Detection

Detect the user's language from their message:

  • If Russian (or contains Cyrillic): respond in Russian
  • If English (or other Latin-script language): respond in English
  • If ambiguous: respond in the language of the trigger phrase used

Instructions

Step 1: Validate Input

  1. Check that the user has pasted a list of invoices or payments.

    • If input is empty or contains only whitespace: stop and respond: "Вставь список счетов (номер, клиент, дата, сумма, статус). / Paste your invoice list (invoice #, client, date, amount, status)."
    • If input looks like a bank statement (contains debit/credit/transaction columns): stop and respond: "Это банковская выгрузка, а не список счетов. Для анализа банковских транзакций используй скилл monthly-close-checklist. / This looks like a bank statement. For transaction analysis, use the monthly-close-checklist skill."
    • If the user asks to write a reminder letter or dunning message: redirect: "Этот скилл составляет сводку, а не письма-напоминания. Для серии напоминаний используй accounts-receivable-followup-writer. / This skill builds a status summary, not reminder messages. For a reminder sequence, use accounts-receivable-followup-writer."
  2. Identify the report date (use today's date if not provided).

Step 2: Parse Columns and Confirm Mapping

  1. Identify columns or fields in the input. Look for: Invoice #, Client Name, Invoice Date, Due Date, Amount, Paid Amount or Status.
  2. If column headers are clear and standard: proceed directly to Step 3.
  3. If headers are ambiguous, missing, or non-standard (e.g., "Контрагент", "Сумма к оплате", "Дата оплаты"):
    • Present a mapping confirmation:

      "Я вижу следующие поля: [col1] → Invoice #, [col2] → Client, [col3] → Amount. Верно? / I see these fields: [col1] → Invoice #, [col2] → Client, [col3] → Amount. Correct?"

    • Wait for user confirmation before proceeding. Do not generate output until mapping is confirmed.

Read the full file on GitHub · 189 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 12d ago First seen · 189 lines · 74 tokens per session scan A d4ec2d675821

Subscribe to this mod's changes

invoice-and-payment-tracker-summary is a skill published in the GitHub repository KirKruglov/claude-skills-kit (18 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 2,276 once invoked, about $0.0004 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.

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