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 zgbrenner/agentcounsel --skill international-tax-issue-spottergit clone --depth 1 https://github.com/zgbrenner/agentcounselWrote 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/zgbrenner/agentcounsel/international-tax-issue-spotter)<a href="https://agentmods.dev/skills/zgbrenner/agentcounsel/international-tax-issue-spotter"><img src="https://agentmods.dev/badge/skills/zgbrenner/agentcounsel/international-tax-issue-spotter/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/zgbrenner/agentcounsel/international-tax-issue-spotter"><img src="https://agentmods.dev/badge/skills/zgbrenner/agentcounsel/international-tax-issue-spotter.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 | $0.00048 | $0.01460 |
| Opus 5 | $0.00024 | $0.00730 |
| Sonnet 5 | $0.00010 | $0.00292 |
| Haiku 4.5 | $0.00005 | $0.00146 |
Grade A, and why
International Tax Issue Spotter 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 — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.
International Tax Issue Spotter
Purpose
Issue-spot the cross-border tax questions raised by a structure or transaction into a source-cited issue map, with the jurisdictions involved, missing facts, and questions for tax counsel. This skill identifies and frames cross-border issues; it concludes nothing about treaty benefits, withholding, permanent establishment, transfer pricing, VAT/GST, or CFC/PFIC status.
Use When
- A cross-border structure or transaction needs its tax issues spotted and organized before tax counsel evaluates them.
- A team needs the jurisdictions, issue areas, and missing facts mapped for an international tax review.
- A matter touches foreign entities, persons, payments, or operations and the questions must be scoped.
Required Inputs
- The cross-border structure: foreign entities and persons, the jurisdictions
implicated, and the user's role, or
[verify jurisdiction]. - Cross-border activity facts the user provides: withholding situations; permanent-establishment concepts, if raised; transfer pricing; intercompany services; royalties and IP; cross-border employment.
- VAT/GST facts, if relevant.
- Tax treaties, if provided.
- Foreign bank accounts, if mentioned, and any CFC or PFIC questions, if raised.
- Tax year(s) or period(s) and the review purpose.
- Source documents with citations to sections, schedules, or pages.
If the structure, the jurisdictions, or the activity facts are missing, record
them as not provided and return the missing-information list first.
Do Not Use When
- The request is to conclude treaty benefits, a withholding rate, permanent-establishment status, transfer-pricing compliance, VAT/GST treatment, or CFC/PFIC status.
- The request is to determine a foreign reporting or filing obligation, or to compute foreign tax.
- The request is for tax advice or a filing deadline.
Also out of scope (this skill does not): conclude treaty benefits or withholding rates; determine permanent-establishment status; opine on transfer-pricing compliance; determine VAT/GST treatment; conclude CFC or PFIC status; determine a foreign reporting or filing obligation; compute tax; or provide tax advice.
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 · 139 lines · 48 tokens per session scan A 15343294c6fb
International Tax Issue Spotter is a skill published in the GitHub repository zgbrenner/agentcounsel (19 stars, last pushed 1mo ago), licensed MIT. It adds 48 tokens to every session and 1,460 once invoked, about $0.0002 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 2026-09-03.
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