customs-trade-law

customs-trade-law is a skill for Claude Code, Codex from LegalQuants/lq-skills. It costs 40 tokens per session (2,832 once invoked), scanned A, original, Apache-2.0.

A research and analysis guide for US import-trade law. It helps classify products under the Harmonized Tariff Schedule, find Customs rulings, and connect classification questions to court decisions.

In plain words
What is it for?
It is for product classification, Customs ruling research, resolving conflicting rulings, mapping Court of International Trade and Federal Circuit cases, and preparing import-compliance analysis.
Why use it?
It reduces the time spent comparing similar products, government rulings, and legal precedents. Its work still needs review by a licensed customs broker or trade attorney.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for product classification, Customs ruling research, resolving conflicting rulings, mapping Court of International Trade and Federal Circuit cases, and preparing import-compliance analysis.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/legalquants/lq-skills/customs-trade-law
Install

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.

Any agent
npx skills add LegalQuants/lq-skills --skill customs-trade-law
Clone the repo
git clone --depth 1 https://github.com/LegalQuants/lq-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for customs-trade-law

README.md
[![agentmods](https://agentmods.dev/badge/skills/legalquants/lq-skills/customs-trade-law/github.svg)](https://agentmods.dev/skills/legalquants/lq-skills/customs-trade-law)
Your own site
<a href="https://agentmods.dev/skills/legalquants/lq-skills/customs-trade-law"><img src="https://agentmods.dev/badge/skills/legalquants/lq-skills/customs-trade-law/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.

agentmods 80×15 button for customs-trade-law

Your own site · 80×15
<a href="https://agentmods.dev/skills/legalquants/lq-skills/customs-trade-law"><img src="https://agentmods.dev/badge/skills/legalquants/lq-skills/customs-trade-law.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,832 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00040 $0.02832
Opus 5 $0.00020 $0.01416
Sonnet 5 $0.00008 $0.00566
Haiku 4.5 $0.00004 $0.00283

Measured 12d ago against content hash a97d66fa6e6f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

customs-trade-law 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 12d 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.

skills/customs-trade-law/SKILL.md · 167 lines

How it starts

The opening of the file, as written. The whole thing — 167 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Customs Trade Law Skill

When to Use

  • Classifying a product under the Harmonized Tariff Schedule (HTS)
  • Researching CBP ruling history for similar products
  • Resolving conflicts between HQ and NY rulings
  • Mapping CIT/CAFC case law to classification questions
  • Building compliance analysis for import transactions

Audience and Work Shape

Audience: Licensed customs brokers, trade-compliance counsel, or in-house import managers working under a licensed reviewer. Not for self-service use by importers without compliance review, and not for unsupervised drafting of binding ruling requests, Customs Form 28/29 responses, or § 177 submissions.

Work shape:

  • Module 1 (HTS Classification) — Accretive Judgment. Output is a ranked-candidates worksheet with GRI reasoning and exposed assumptions, handed back to a licensed broker or trade attorney who signs the binding classification call.
  • Module 2 (CROSS Ruling Research) — Pattern-Matched Review. Output is a list of cited rulings with authority level and current status, reviewed by counsel before reliance.
  • Module 3 (CIT/CAFC Case Mapping) — Accretive Judgment. Output is mapped precedent with risk framing, reviewed before being cited in any opinion or ruling request.

This skill provides legal support, not legal advice or a binding classification. A candidate classification output is a draft worksheet for the reviewer — not a primary classification, not a § 177 ruling request, and not a basis for entering merchandise.

Three legal failure modes are addressed structurally:

Advice vs. support. Outputs are draft worksheets, not finished classification opinions. The skill does not produce a single "primary" HTS number on its own authority. The reviewer-of-record (a licensed customs broker or trade attorney) makes the classification call and signs the deliverable. Misclassification carries civil and potentially criminal exposure under 19 U.S.C. § 1592 (negligence, gross negligence, fraud); the named reviewer — not the skill — bears that responsibility.

Read the full file on GitHub · 167 lines

Changes

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.

  1. 12d ago First seen · 167 lines · 40 tokens per session scan A a97d66fa6e6f

Subscribe to this mod's changes

customs-trade-law is a skill published in the GitHub repository LegalQuants/lq-skills (54 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 40 tokens to every session and 2,832 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 2026-08-30.

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