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 sales-use-tax-nexus-triagegit 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/sales-use-tax-nexus-triage)<a href="https://agentmods.dev/skills/zgbrenner/agentcounsel/sales-use-tax-nexus-triage"><img src="https://agentmods.dev/badge/skills/zgbrenner/agentcounsel/sales-use-tax-nexus-triage/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/sales-use-tax-nexus-triage"><img src="https://agentmods.dev/badge/skills/zgbrenner/agentcounsel/sales-use-tax-nexus-triage.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 | $0.00036 | $0.01388 |
| Opus 5 | $0.00018 | $0.00694 |
| Sonnet 5 | $0.00007 | $0.00278 |
| Haiku 4.5 | $0.00004 | $0.00139 |
Grade A, and why
Sales Use Tax Nexus Triage 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 — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sales Use Tax Nexus Triage
Purpose
Intake-map a taxpayer's sales and use tax facts jurisdiction by jurisdiction into a source-cited fact map and open-question tracker, so a qualified tax professional can evaluate nexus, taxability, and registration. This skill organizes facts; it draws no nexus or taxability conclusion.
Use When
- A taxpayer's sales/use tax footprint must be mapped across multiple jurisdictions before a professional evaluates it.
- A team needs physical-presence, economic-activity, and marketplace facts organized per jurisdiction with sources.
- A transaction or registration project needs the nexus facts triaged first.
Required Inputs
- Jurisdictions in scope (states and localities), or
not provided. - Taxpayer/entity type and the user's role.
- Tax period(s) of interest, or
not provided. - Customers and revenue streams, and product/service type — including digital goods, software, and SaaS where relevant.
- Physical-presence facts: offices, inventory locations, remote employees, and property.
- Marketplace-facilitator facts: sales made through marketplaces.
- Exemption certificates and resale certificates on file.
- Economic-nexus facts the user supplies (sales volume, transaction counts) — recorded as user-stated facts, never measured against an invented threshold.
- Historical registrations and filings.
- Source documents with citations to reports, ledgers, or pages.
If jurisdictions, taxpayer/entity type, or the product/service type are
missing, record them as not provided and return the missing-information list
first.
Do Not Use When
- The request is to conclude whether nexus exists in a jurisdiction.
- The request is to decide taxability, a registration, collection, or remittance obligation, or a filing deadline.
- The request is to compute sales/use tax due, or for tax advice.
Also out of scope (this skill does not): conclude nexus, taxability, a registration obligation, a collection obligation, a remittance obligation, or a filing deadline; calculate tax due; 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 · 137 lines · 36 tokens per session scan A 21af492baa11
Sales Use Tax Nexus Triage is a skill published in the GitHub repository zgbrenner/agentcounsel (19 stars, last pushed 1mo ago), licensed MIT. It adds 36 tokens to every session and 1,388 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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