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 Receiptor-AI/bookkeeping-skills --skill expense-categorizationgit clone --depth 1 https://github.com/Receiptor-AI/bookkeeping-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/receiptor-ai/bookkeeping-skills/expense-categorization)<a href="https://agentmods.dev/skills/receiptor-ai/bookkeeping-skills/expense-categorization"><img src="https://agentmods.dev/badge/skills/receiptor-ai/bookkeeping-skills/expense-categorization/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/receiptor-ai/bookkeeping-skills/expense-categorization"><img src="https://agentmods.dev/badge/skills/receiptor-ai/bookkeeping-skills/expense-categorization.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 | $0.00071 | $0.01992 |
| Opus 5.5 | $0.00028 | $0.00797 |
| Sonnet 5.5 | $0.00014 | $0.00398 |
| Haiku 4.5 | $0.00007 | $0.00199 |
Grade A, and why
expense-categorization 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 1mo 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 — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Expense Categorization
Assign every transaction to the correct expense category so it flows to the right line on a tax return, produces accurate financial statements, and survives an audit.
Read these when needed
- Read references/DECISION-RULES.md when deciding whether a category is safe to auto-assign or should go to review.
- Run
scripts/category_review_summary.pywhen you already have categorized records and need a deterministic summary by confidence, category, and review status.
Why categorization matters
The IRS doesn't audit "total expenses." It audits individual line items on Schedule C (or the equivalent form for your entity type). A business that lumps everything into "Other Expenses" invites scrutiny. Proper categorization also reveals spending patterns — you can't cut costs you can't see.
For the full Schedule C line-by-line reference (Lines 8–27a with what belongs and what doesn't), see the schedule-c-categories skill.
Categorization logic
Primary signal: vendor name
Most categorization comes from the vendor name alone. Use the mapping table below to auto-categorize high-confidence vendors.
Secondary signal: line items
When the vendor is ambiguous (Amazon, Walmart, Costco), look at line items from the receipt. This is where high-quality extraction is especially useful — line items matter more than totals. Amazon with "USB-C Hub, Monitor Stand" → Equipment. Amazon with "Paper Towels, Hand Soap" → Office Supplies. Mixed orders should be split across categories.
Tertiary signal: amount patterns
Recurring monthly charges at the same amount → likely Software & Subscriptions (Line 27a). Round-number transfers to individuals → likely Contractors (Line 11). Small charges at restaurants → Meals (Line 24b).
Learning from corrections
When the user corrects a categorization, store that mapping. User-confirmed mappings should override default logic going forward.
High-confidence vendor mapping (auto-categorize)
What ships with it
2 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.
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.
- 1mo ago First seen · 171 lines · 71 tokens per session scan A dcd96a022990
expense-categorization is a skill published in the GitHub repository Receiptor-AI/bookkeeping-skills (8 stars, last pushed 5d ago), licensed MIT. It adds 71 tokens to every session and 1,992 once invoked, about $0.0003 per session on Opus 5.5. 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.
Other skills, from other repositories
accounting-audit-system-builder
Routes an accounting or audit request to the right module skill, from software selection through monthly closing, asking only what is missing. Use for books of accounts or audit files.
bookkeeping
Use when a small business needs audit-ready books — a chart of accounts, posting a transaction to the right account and side, clearing an uncategorized bank feed, cash vs accrual, or a ledger that won't tie to the bank. NOT interpreting the numbers — runway, burn, P&L cadence (that is finance-ops), NOT issuing…
tax-calculator
Calculate tax implications of trades and generate tax reports.
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.
australia-gst
Use this skill whenever asked to prepare, review, or classify transactions for an Australian GST return (Business Activity Statement / BAS) for any client. Trigger on phrases like "prepare BAS", "do the GST", "fill in BAS", "create the return", "GST return", "Activity Statement", or any request involving Australian…
brazil-vat
> Use esta skill sempre que perguntarem sobre tributos indiretos brasileiros, IVA, tributos sobre o consumo, PIS, Cofins, ICMS, ISS, IPI, CBS, IBS, Imposto Seletivo, NF-e (Nota Fiscal Eletronica), NFS-e, Simples Nacional, registro de CNPJ, reforma tributaria (EC 132/2023, LC 214/2025, LC 227/2026) ou qualquer questao…