chase-overdue-invoices

chase-overdue-invoices is a skill for Claude Code, Codex from RunButter/runbutter. It costs 57 tokens per session (456 once invoked), scanned A, original, MIT.

A skill that finds unpaid invoices past their due date, calculates how late they are, and drafts a separate payment reminder for each one. It checks both invoice status and dates so recently overdue invoices are not missed.

In plain words
What is it for?
Use it to review overdue payments, aged receivables, or debtors. It helps prioritize invoices by amount and lateness and prepares messages without sending them.
Why use it?
It turns an accounts-receivable list into a prioritized set of follow-ups while checking for existing payment plans or disputes first.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to review overdue payments, aged receivables, or debtors. It helps prioritize invoices by amount and lateness and prepares messages without sending them.

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Install with agentmods
npx agentmods add skills/runbutter/runbutter/chase-overdue-invoices
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 RunButter/runbutter --skill chase-overdue-invoices
Clone the repo
git clone --depth 1 https://github.com/RunButter/runbutter

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 chase-overdue-invoices

README.md
[![agentmods](https://agentmods.dev/badge/skills/runbutter/runbutter/chase-overdue-invoices/github.svg)](https://agentmods.dev/skills/runbutter/runbutter/chase-overdue-invoices)
Your own site
<a href="https://agentmods.dev/skills/runbutter/runbutter/chase-overdue-invoices"><img src="https://agentmods.dev/badge/skills/runbutter/runbutter/chase-overdue-invoices/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 chase-overdue-invoices

Your own site · 80×15
<a href="https://agentmods.dev/skills/runbutter/runbutter/chase-overdue-invoices"><img src="https://agentmods.dev/badge/skills/runbutter/runbutter/chase-overdue-invoices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 456 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 $0.00057 $0.00456
Opus 5 $0.00028 $0.00228
Sonnet 5 $0.00011 $0.00091
Haiku 4.5 $0.00006 $0.00046

Measured 11d ago against content hash 90fc38b6539f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

chase-overdue-invoices 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 11d 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.

plugin/skills/chase-overdue-invoices/SKILL.md · 43 lines

What it actually says

Chase overdue invoices

Find them

Call get_finance_summary first — it returns the outstanding total, so you know whether there is anything to chase before listing anything.

Then list_records with object: "invoices". An invoice is overdue when status is overdue, or when status is sent and due_at is in the past. Check both: overdue is set by a sweep, so a freshly-lapsed invoice is still sent and would otherwise be missed.

Order by what actually matters

Sort by days late × amount, not by amount alone. A 90-day-late 2,000 is a worse problem than a 5-day-late 20,000, because age predicts non-payment and a few days usually means the payment run has not happened yet.

Before drafting anything

Look up the client with get_record on the invoice's organization_id, then get_record_notes on it. Someone may have already agreed a payment plan or noted a dispute. Chasing a client who was promised until the 30th is worse than not chasing at all, and the note is the only place that agreement exists.

Draft, do not send

Produce one message per invoice with the number, the amount, the due date and the days elapsed. Match tone to age: under 14 days is a reminder that assumes an oversight; over 60 days states the position and asks for a payment date.

Never claim a payment has not arrived without checking get_ledger for a matching credit first — reconciliation runs on a schedule, so money can be in the account and not yet against the invoice. Chasing someone who has paid costs more than the invoice is worth.

Then stop and show your drafts. Sending is a human decision.

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. 11d ago First seen · 43 lines · 57 tokens per session scan A 90fc38b6539f

Subscribe to this mod's changes

chase-overdue-invoices is a skill published in the GitHub repository RunButter/runbutter (2 stars, last pushed 23d ago), licensed MIT. It adds 57 tokens to every session and 456 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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