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 michielinksee/bantou --skill tax-classifiergit clone --depth 1 https://github.com/michielinksee/bantouWrote 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/michielinksee/bantou/tax-classifier)<a href="https://agentmods.dev/skills/michielinksee/bantou/tax-classifier"><img src="https://agentmods.dev/badge/skills/michielinksee/bantou/tax-classifier/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/michielinksee/bantou/tax-classifier"><img src="https://agentmods.dev/badge/skills/michielinksee/bantou/tax-classifier.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 | $0.00033 | $0.00764 |
| Opus 5.5 | $0.00013 | $0.00306 |
| Sonnet 5.5 | $0.00007 | $0.00153 |
| Haiku 4.5 | $0.00003 | $0.00076 |
Grade A, and why
tax-classifier 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 2mo 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 — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tax Classifier
Classify Japanese business transactions into standard accounting categories (kanjou-kamoku / 勘定科目) using a 3-stage pipeline that minimizes API costs and maximizes accuracy.
When to use
Invoke this skill whenever the user provides a transaction description (e.g. "スタバ 渋谷店 ¥580") and needs:
- A 勘定科目 classification
- A 税区分 (consumption-tax treatment) assignment
- A confidence score
Pipeline overview
Stage 0 — Exclusion check (7 rules)
Before any classification attempt, run check_exclusion to filter out
non-classifiable items. The standard rules exclude:
- Transfer-to-self (振替) entries
- Opening / closing balance lines
- Duplicate reversed entries (赤伝)
- Summary / subtotal rows
- Tax-payment lines handled separately
- Payroll deduction detail lines
- Memo-only entries with zero amount
If an item is excluded, return the exclusion reason without proceeding.
Stage 1 — Memory recall + keyword dictionary (14 categories)
Query recall_memory first. If the exact vendor or pattern has been
corrected before, use the memorized classification immediately.
If no memory hit, match against the 14-category keyword dictionary:
| Category | Examples |
|---|---|
| 会議費 | cafe, meeting room |
| 交際費 | dinner with client, gift |
| 旅費交通費 | train, taxi, hotel |
| 通信費 | phone, internet, postage |
| 消耗品費 | office supplies, toner |
| 地代家賃 | rent, parking |
| 水道光熱費 | electricity, gas, water |
| 支払手数料 | bank fee, service charge |
| 広告宣伝費 | ads, marketing |
| 外注費 | subcontractor, freelancer |
| 福利厚生費 | employee meal, health check |
| 保険料 | insurance premium |
| 租税公課 | stamp duty, property tax |
| 雑費 | miscellaneous (last resort) |
Stage 2 — Claude AI fallback
When keyword matching fails or confidence is below threshold, call
classify_transaction which uses Claude to analyze the description
with full context from the firm's CLAUDE.md configuration.
Consumption tax handling
Always assign a tax treatment. Be careful with the rates:
- 10% — standard rate (標準税率)
- 8% reduced — food/beverage for takeout, newspaper subscriptions (軽減税率)
- Exempt (非課税) — land rent, insurance, interest
- Non-taxable (不課税) — donations, damages, foreign transactions
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.
- 2mo ago First seen · 93 lines · 33 tokens per session scan A 1d2eb41e91b3
tax-classifier is a skill published in the GitHub repository michielinksee/bantou (2 stars, last pushed 2mo ago), licensed MIT. It adds 33 tokens to every session and 764 once invoked, about $0.0001 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.
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