claim-citation-check

claim-citation-check is a skill for Claude Code, Codex from ntaffzii/Skill-Agents. It costs 112 tokens per session (1,259 once invoked), scanned A, original, MIT.

A final check for research writing that contains citations, statistics, or specific factual claims. It verifies that sources exist, support the attached claims, and that important uncited facts are not overlooked.

In plain words
What is it for?
Use it before delivering a report, summary, news brief, or research result with sources, numbers, dates, or attributed statements. It checks both cited and uncited factual claims.
Why use it?
A citation can look relevant without actually proving the sentence beside it, and fabricated or misplaced citations can be hard to notice during editing.

Skill for Claude CodeCodex

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

Good fit Use it before delivering a report, summary, news brief, or research result with sources, numbers, dates, or attributed statements. It checks both cited and uncited factual claims.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ntaffzii/skill-agents/claim-citation-check
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 ntaffzii/Skill-Agents --skill claim-citation-check
Clone the repo
git clone --depth 1 https://github.com/ntaffzii/Skill-Agents

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 claim-citation-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/ntaffzii/skill-agents/claim-citation-check/github.svg)](https://agentmods.dev/skills/ntaffzii/skill-agents/claim-citation-check)
Your own site
<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/claim-citation-check"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/claim-citation-check/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 claim-citation-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/claim-citation-check"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/claim-citation-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 112 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,259 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 $0.00112 $0.01259
Opus 5 $0.00056 $0.00629
Sonnet 5 $0.00022 $0.00252
Haiku 4.5 $0.00011 $0.00126

Measured 12d ago against content hash 43d2f76aee29, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

claim-citation-check 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.

The scan reads SKILL.md. This mod also ships 1 executable file (extract_claims.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/research/claim-citation-check/SKILL.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claim / Citation Integrity Check

Overview

LLM-generated research writing has a well-documented failure mode: citations that don't exist, or citations attached to a claim the source doesn't actually support (topically related but not actually saying that). Neither failure is visible from reading the text alone — the sentence reads as confidently sourced either way. This skill is a pre-finalization gate: before a research output ships, walk every citation and every uncited specific claim through an explicit check instead of trusting that "it has a citation" means "it's verified."

This is a general-purpose research-integrity check, not specific to academic papers — it applies to daily-news-report, github-skill-research, project-discovery, or any output that cites sources.

When to use

  • ก่อนส่งมอบ research report, news brief, หรือ summary ที่มี citation/สถิติ
  • ตรวจว่า claim แต่ละอันมี source รองรับจริง ไม่ใช่แค่ "ดูน่าเชื่อถือ"
  • Reviewing a draft where numbers, dates, or attributed quotes appear — verify each against its actual source before finalizing
  • As the last step of any workflow that produces a sourced output (pairs naturally with markdown-report, daily-news-report, github-skill-research)

When NOT to use

  • The output contains no citations, statistics, or specific factual claims — general reasoning/opinion/code doesn't need this check
  • The claim is genuinely common knowledge with no realistic chance of being wrong (e.g. "Python is a programming language") — citing every sentence, including trivial ones, is its own failure mode (noise that buries the claims that actually need scrutiny)

Core knowledge

Three questions for every citation, in order:

  1. Does the source exist? A URL, DOI, paper title, or quote that looks plausible can still be fabricated. If a tool with real web access is available (WebFetch/WebSearch), actually resolve the citation rather than trusting that it looks well-formed.
  2. Does the source say what the claim attributes to it? A citation can be to a real, existing source that simply doesn't support the specific claim next to it — topically related is not the same as actually supporting the claim. This is the failure mode most likely to slip through casual review, because the citation "checks out" at a glance.
  3. Is the number/date/quote exact? A citation can correctly support the general claim while misquoting the specific figure (rounding, unit confusion, conflating two different reported numbers). Check the exact figure against the source, not just the general direction.

Read the full file on GitHub · 60 lines

Files

What ships with it

1 file 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. 12d ago First seen · 60 lines · 112 tokens per session scan A 43d2f76aee29

Subscribe to this mod's changes

claim-citation-check is a skill published in the GitHub repository ntaffzii/Skill-Agents (4 stars, last pushed 3d ago), licensed MIT. It adds 112 tokens to every session and 1,259 once invoked, about $0.0006 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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