claims-substantiation

claims-substantiation is a skill for Claude Code from Cleo-Labs-IA/skills_library. It costs 54 tokens per session (3,169 once invoked), scanned A, original, MIT.

A guide for checking whether product claims in packaging or advertising are supported by evidence and allowed in a target market. Claims can include environmental, ingredient, safety, or performance statements.

In plain words
What is it for?
Use it to review proposed wording, identify needed evidence, check ingredients against a claim, and store supporting documents.
Why use it?
It helps prevent unsupported claims that may lead to enforcement action, fines, or product recalls.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the compliance-product-guidance plugin — 53 skills shipped together

Good fit Use it to review proposed wording, identify needed evidence, check ingredients against a claim, and store supporting documents.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cleo-labs-ia/skills_library/claims-substantiation
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 Cleo-Labs-IA/skills_library --skill claims-substantiation
Clone the repo
git clone --depth 1 https://github.com/Cleo-Labs-IA/skills_library

Made for: Claude Code.

Or install compliance-product-guidance, the plugin that ships this one along with the rest of its 53 skills.

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 claims-substantiation

README.md
[![agentmods](https://agentmods.dev/badge/skills/cleo-labs-ia/skills_library/claims-substantiation/github.svg)](https://agentmods.dev/skills/cleo-labs-ia/skills_library/claims-substantiation)
Your own site
<a href="https://agentmods.dev/skills/cleo-labs-ia/skills_library/claims-substantiation"><img src="https://agentmods.dev/badge/skills/cleo-labs-ia/skills_library/claims-substantiation/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 claims-substantiation

Your own site · 80×15
<a href="https://agentmods.dev/skills/cleo-labs-ia/skills_library/claims-substantiation"><img src="https://agentmods.dev/badge/skills/cleo-labs-ia/skills_library/claims-substantiation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,169 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 $0.00054 $0.03169
Opus 5 $0.00027 $0.01584
Sonnet 5 $0.00011 $0.00634
Haiku 4.5 $0.00005 $0.00317

Measured 11d ago against content hash dd32a3598053, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

claims-substantiation 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 11d 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/claims-substantiation/SKILL.md · 222 lines

How it starts

The opening of the file, as written. The whole thing — 222 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claims Substantiation

Validate marketing claims against regulations. Every claim on your product or marketing must be substantiated before use. Unsubstantiated claims = enforcement action, fines, recall.

MCP Tools

# Search for claims-related regulation signals
mcp__claude_ai_Cleo_Insight__search_signals(q="claims regulation", limit=25)
mcp__claude_ai_Cleo_Insight__search_signals(q="green claims", limit=25)
mcp__claude_ai_Cleo_Insight__search_signals(q="greenwashing", limit=25)

# Get regulation details for claims rules
mcp__claude_ai_Cleo_Insight__get_regulation(id="<regulation-id>")

# Check if product ingredients support the claim
mcp__claude_ai_CLEO_LEGAL_API__compliance/check
  product_description: "<product with claim>"
  ingredients: ["<ingredients>"]
  target_markets: ["EU", "US", "UK"]

# Upload claims substantiation file as evidence
mcp__bastion__upload-compliance-document(name="claims-dossier-2026.pdf", document="data:application/pdf;base64,...")
mcp__bastion__add-compliance-test-evidence(testId="<test-id>", name="Claims substantiation dossier", description="Clinical study and consumer perception test for anti-aging claims", evidenceDocumentId="<doc-id>")

Claims Decision Tree

digraph {
  rankdir=TB; node [shape=box style=rounded fontsize=10];
  claim [label="Proposed claim" shape=hexagon];
  type [label="Claim type?" shape=diamond];
  cosmetic [label="Cosmetic claim\n(appearance, comfort,\nmoisturize, smooth)"];
  health [label="Health/therapeutic claim\n(treats, cures, prevents,\nheals, reduces symptoms)"];
  green [label="Environmental claim\n(natural, organic, eco,\nbiodegradable, recyclable)"];
  food_claim [label="Nutrition/health claim\n(high in, source of,\nreduces cholesterol)"];
  cosm_ok [label="Allowed if:\n6 EU criteria met\n+ evidence exists"];
  drug [label="STOP -- this makes\nyour product a DRUG\nin US (FDA 21 USC 321)\nor MEDICINE in EU"];
  green_check [label="EU Green Claims\nDirective evidence\nrequired"];
  food_check [label="Must be on authorized\nclaims list (EU 432/2012)\nor FDA-compliant"];

  claim -> type;
  type -> cosmetic [label="cosmetic"];
  type -> health [label="health"];
  type -> green [label="environmental"];
  type -> food_claim [label="food"];
  cosmetic -> cosm_ok;
  health -> drug;
  green -> green_check;
  food_claim -> food_check;
}

Read the full file on GitHub · 222 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. 11d ago First seen · 222 lines · 54 tokens per session scan A dd32a3598053

Subscribe to this mod's changes

claims-substantiation is a skill published in the GitHub repository Cleo-Labs-IA/skills_library (1 stars, last pushed 3mo ago), licensed MIT. It adds 54 tokens to every session and 3,169 once invoked, about $0.0003 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 2026-08-31.

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