verifying

verifying is a skill for Claude Code from genli-ai/market-research-skills. It costs 214 tokens per session (5,476 once invoked), scanned A, original, MIT.

A set of instructions for checking facts, numbers, quotations, and events against reliable original sources.

In plain words
What is it for?
Use it to verify statements, trace numbers to their sources, check quotations, investigate negative claims, and compare disagreements between authoritative sources.
Why use it?
It reduces the risk of repeating unsupported claims, missing important context, or choosing between conflicting figures without investigation.

Skill for Claude Code

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

Part of the market-research-skills plugin — 4 skills, 1 hook shipped together

Good fit Use it to verify statements, trace numbers to their sources, check quotations, investigate negative claims, and compare disagreements between authoritative sources.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/genli-ai/market-research-skills/verifying
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 genli-ai/market-research-skills --skill verifying
Clone the repo
git clone --depth 1 https://github.com/genli-ai/market-research-skills

Made for: Claude Code.

Or install market-research-skills, the plugin that ships this one along with the rest of its 4 skills, 1 hook.

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 verifying

README.md
[![agentmods](https://agentmods.dev/badge/skills/genli-ai/market-research-skills/verifying/github.svg)](https://agentmods.dev/skills/genli-ai/market-research-skills/verifying)
Your own site
<a href="https://agentmods.dev/skills/genli-ai/market-research-skills/verifying"><img src="https://agentmods.dev/badge/skills/genli-ai/market-research-skills/verifying/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 verifying

Your own site · 80×15
<a href="https://agentmods.dev/skills/genli-ai/market-research-skills/verifying"><img src="https://agentmods.dev/badge/skills/genli-ai/market-research-skills/verifying.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 214 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,476 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 $0.00214 $0.05476
Opus 5 $0.00107 $0.02738
Sonnet 5 $0.00043 $0.01095
Haiku 4.5 $0.00021 $0.00548

Measured 13d ago against content hash 0d4742154f82, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

verifying 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 13d 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/verifying/SKILL.md · 361 lines

How it starts

The opening of the file, as written. The whole thing — 361 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Information Verification Skill

Bilingual skill. Chinese version: SKILL.zh.md. English is the single source of truth; the .zh.md is a synchronized translation — always edit the English first, then mirror the change into .zh.md in the same change-set, never edit only the Chinese.

Purpose

The user provides a sentence or paragraph that needs verification. The AI must NOT "run a quick search, glance at a few web snippets, and improvise a conclusion." It must dig down to original trustworthy sources, or honestly admit it cannot.

Five scenarios are covered:

  1. Basic truthfulness check: whether the numbers / facts / quotes in the statement are accurate.
  2. Completeness: when the source is correct but the user's quotation is out of context — supply the missing context.
  3. One-level reasoning verification: when a direct number cannot be traced to a primary source, cross-check via metric decomposition (Z = P × Q).
  4. Negative statements: detect unfalsifiable claims like "X has never done Y" and switch to a "search for a counter-example" path.
  5. Multi-source conflict: when two authoritative sources disagree on the same figure, present them side-by-side with a difference attribution.

Input

The user supplies one statement (or paragraph) to verify. Optional attachments (PDFs, links, screenshots, notes) take priority as material to verify against.

Scope exclusions (refused topics)

Before any verification work begins, check whether the statement falls into a refused category. The following topics are out of scope regardless of how the request is phrased or how specific the question is:

  • Political issues — elections, parties, political figures' positions, geopolitical disputes, government legitimacy debates, etc.
  • Military issues — military operations, force composition, equipment counts, conflict details, defense policy, etc.
  • Religious issues — doctrines, denominational disputes, religious leaders' statements, inter-faith comparisons, etc.
  • Entertainment celebrity gossip — personal lives, relationships, family affairs, paparazzi rumors, etc.
  • Other inherently controversial topics — even attempting verification can be inflammatory regardless of what the answer turns out to be.

Read the full file on GitHub · 361 lines

Files

What ships with it

2 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.

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. 13d ago First seen · 361 lines · 214 tokens per session scan A 0d4742154f82

Subscribe to this mod's changes

verifying is a skill published in the GitHub repository genli-ai/market-research-skills (62 stars, last pushed 3mo ago), licensed MIT. It adds 214 tokens to every session and 5,476 once invoked, about $0.0011 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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