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 finsilabs/awesome-ecommerce-skills --skill tax-compliance-automationgit clone --depth 1 https://github.com/finsilabs/awesome-ecommerce-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/finsilabs/awesome-ecommerce-skills/tax-compliance-automation)<a href="https://agentmods.dev/skills/finsilabs/awesome-ecommerce-skills/tax-compliance-automation"><img src="https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/tax-compliance-automation/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/finsilabs/awesome-ecommerce-skills/tax-compliance-automation"><img src="https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/tax-compliance-automation.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 | $0.00034 | $0.03784 |
| Opus 5 | $0.00017 | $0.01892 |
| Sonnet 5 | $0.00007 | $0.00757 |
| Haiku 4.5 | $0.00003 | $0.00378 |
Grade A, and why
tax-compliance-automation 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 — 300 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tax Compliance Automation
Overview
Tax compliance for ecommerce is one of the most complex operational challenges at scale. In the United States alone, there are over 13,000 taxing jurisdictions with different rates, product taxability rules, filing frequencies, and economic nexus thresholds. Internationally, VAT (Europe, UK, Australia) and GST (Canada, India, New Zealand) add additional compliance layers with their own registration thresholds, invoice requirements, and reporting obligations.
This skill covers the full tax compliance lifecycle: nexus threshold tracking to know when you must register in a new jurisdiction, real-time tax calculation at checkout, exemption certificate management for B2B customers, automated filing, and audit-ready reporting. All major platforms have direct integrations with TaxJar and Avalara that handle this without custom code.
When to Use This Skill
- When your store ships to customers in multiple US states and you are unsure of nexus obligations
- When you need to collect EU VAT under OSS/IOSS for European customers
- When building B2B ecommerce that requires exemption certificate management
- When current tax rates are hardcoded and have not been updated in 12+ months
- When preparing for an audit and you need documented, reconcilable tax records
- When launching in a new country and you need to understand VAT/GST registration requirements
Core Instructions
Step 1: Determine your platform and choose the right tax compliance tool
| Platform | Recommended Tool | Notes |
|---|---|---|
| Shopify | Shopify Tax (built-in) + TaxJar or Avalara AvaTax (Shopify App Store) | Shopify Tax covers basic US nexus; TaxJar and Avalara add filing automation, exemption certificate management, and international VAT |
| WooCommerce | TaxJar for WooCommerce (free plugin) or Avalara AvaTax for WooCommerce | TaxJar is the most popular WooCommerce tax plugin; Avalara's plugin is available from the Avalara website |
| BigCommerce | Avalara AvaTax (native integration) or TaxJar (via BigCommerce App Marketplace) | BigCommerce has a native Avalara connector; TaxJar is also available in the App Marketplace |
| Custom / Headless | TaxJar API or Avalara AvaTax API | Call the API at checkout for real-time rates; commit transactions after payment for filing records |
What ships with it
7 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.
- evals/audit-ready-tax-reporting-and-exemption-/criteria.json 2.8 KB
- evals/audit-ready-tax-reporting-and-exemption-/task.md 3.2 KB
- evals/eu-vat-calculation-and-oss-quarterly-rep/criteria.json 2.6 KB
- evals/eu-vat-calculation-and-oss-quarterly-rep/task.md 2.1 KB
- evals/us-economic-nexus-threshold-tracking/criteria.json 2.5 KB
- evals/us-economic-nexus-threshold-tracking/task.md 2.0 KB
- tile.json 322 B
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 · 300 lines · 34 tokens per session scan A 43578c2a4cf1
tax-compliance-automation is a skill published in the GitHub repository finsilabs/awesome-ecommerce-skills (52 stars, last pushed 6mo ago), licensed MIT. It adds 34 tokens to every session and 3,784 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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