citation-verifier

citation-verifier is a skill for Claude Code from KhaledSaeed18/dotclaude. It costs 113 tokens per session (1,232 once invoked), scanned A, original, MIT.

A citation-checking workflow for a chapter, paper, or proposal. It checks that each reference key exists, that the DOI or arXiv record is real and matches the entry, and that the cited source supports the claim.

In plain words
What is it for?
It helps check LaTeX, Markdown, or Word citations against a .bib bibliography, verify publication details, and report claims that their sources do not support.
Why use it?
It catches missing, fabricated, misidentified, or unsupported references before they undermine academic work. A DOI is a persistent identifier for a scholarly publication, while arXiv is an online repository for research papers.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the thesis plugin — 21 skills, 3 commands, 2 agents shipped together

Good fit It helps check LaTeX, Markdown, or Word citations against a .bib bibliography, verify publication details, and report claims that their sources do not support.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/khaledsaeed18/dotclaude/citation-verifier
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 KhaledSaeed18/dotclaude --skill citation-verifier
Clone the repo
git clone --depth 1 https://github.com/KhaledSaeed18/dotclaude

Made for: Claude Code.

Or install thesis, the plugin that ships this one along with the rest of its 21 skills, 3 commands, 2 agents.

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 citation-verifier

README.md
[![agentmods](https://agentmods.dev/badge/skills/khaledsaeed18/dotclaude/citation-verifier/github.svg)](https://agentmods.dev/skills/khaledsaeed18/dotclaude/citation-verifier)
Your own site
<a href="https://agentmods.dev/skills/khaledsaeed18/dotclaude/citation-verifier"><img src="https://agentmods.dev/badge/skills/khaledsaeed18/dotclaude/citation-verifier/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 citation-verifier

Your own site · 80×15
<a href="https://agentmods.dev/skills/khaledsaeed18/dotclaude/citation-verifier"><img src="https://agentmods.dev/badge/skills/khaledsaeed18/dotclaude/citation-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 113 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,232 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00113 $0.01232
Opus 5.5 $0.00045 $0.00493
Sonnet 5.5 $0.00023 $0.00246
Haiku 4.5 $0.00011 $0.00123

Measured 25d ago against content hash bbca6a4d848b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

citation-verifier scanned grade A with 1 finding 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 25d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

1. If it has a `doi`: `curl -s "https://api.crossref.org/works/<doi>"` and compare title (normalised), first author surname, and year. A DOI that returns 404 is fabricated or mistyped: search CrossRef by title to find th
.claude-plugin/plugins/thesis/skills/citation-verifier/SKILL.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

A fabricated or misattributed citation is the one error a thesis cannot survive. This skill treats every citation as unverified until three checks pass: the key exists, the entry is real, and the claim is supported.

Level 1: every key exists

  1. Extract cite keys from the document:
    • LaTeX: \cite{a,b}, \citep, \citet, \parencite, \textcite, \autocite, \footcite, and starred/optional-argument forms.
    • Markdown/Pandoc: [@key], [@a; @b, p. 3], @key.
    • Word: extract with pandoc file.docx -t markdown and look for Zotero fields or (Author, Year) strings; match those against .bib author+year.
  2. Parse the .bib keys (^@\w+\{([^,]+),).
  3. Report keys cited but not defined (hard error) and entries defined but never cited (informational; the bibliography should usually contain only cited works).

Level 2: every entry is real

For each cited entry:

  1. If it has a doi: curl -s "https://api.crossref.org/works/<doi>" and compare title (normalised), first author surname, and year. A DOI that returns 404 is fabricated or mistyped: search CrossRef by title to find the real one and report both.
  2. If it has an arXiv eprint: curl -s "http://export.arxiv.org/api/query?id_list=<id>" and compare title and first author.
  3. If it has only a URL: curl -sI <url> returns 2xx/3xx; flag as weakly verified.
  4. If it has none of these: curl -s "https://api.crossref.org/works?query.bibliographic=<title>&rows=3" and report whether a plausible match exists. Until it does, the entry is unverified.

Rate-limit to one request per second per host. Cache results in research/.citation-cache.json keyed by DOI so re-runs are fast.

A mismatch in title or author is reported as mismatched, with the fetched metadata beside the .bib entry, because it usually means the wrong DOI was attached to the right paper (or the right DOI to a paraphrased title).

Level 3: every claim is supported

This is the check that catches "the paper says X" when it does not. For each citation in context:

Read the full file on GitHub · 66 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. 25d ago First seen · 66 lines · 113 tokens per session scan A bbca6a4d848b

Subscribe to this mod's changes

citation-verifier is a skill published in the GitHub repository KhaledSaeed18/dotclaude (5 stars, last pushed 2d ago), licensed MIT. It adds 113 tokens to every session and 1,232 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-22.

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