claim-verifier

claim-verifier is an agent for Claude Code from MattArtzAnthro/gephi-ai. It costs 89 tokens per session (1,058 once invoked), scanned A, original, Apache-2.0.

A fact-checking assistant for one structural claim about a Gephi graph, where Gephi is an application for exploring networks of connected items. It measures the graph and reports confirmed, refuted, or can't-tell, with a number.

In plain words
What is it for?
Use it to check claims such as whether one person is more central, two groups interact rarely, or a network remains connected after removing one node.
Why use it?
It helps separate measurable findings from guesses or impressions about a network.

Agent for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the gephi-network-analysis plugin — 1 skill, 11 commands, 4 agents, 1 hook, 1 MCP server shipped together

Good fit Use it to check claims such as whether one person is more central, two groups interact rarely, or a network remains connected after removing one node.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/mattartzanthro/gephi-ai/claim-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.

Clone the repo
git clone --depth 1 https://github.com/MattArtzAnthro/gephi-ai

Made for: Claude Code.

Or install gephi-network-analysis, the plugin that ships this one along with the rest of its 1 skill, 11 commands, 4 agents, 1 hook, 1 MCP server.

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-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/mattartzanthro/gephi-ai/claim-verifier.svg)](https://agentmods.dev/agents/mattartzanthro/gephi-ai/claim-verifier)
Your own site
<a href="https://agentmods.dev/agents/mattartzanthro/gephi-ai/claim-verifier"><img src="https://agentmods.dev/badge/agents/mattartzanthro/gephi-ai/claim-verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 89 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,058 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 $0.00089 $0.01058
Opus 5 $0.00044 $0.00529
Sonnet 5 $0.00018 $0.00212
Haiku 4.5 $0.00009 $0.00106

Measured 7d ago against content hash 84b66c47e0a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

claim-verifier 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 7d 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.

plugins/claude-code/agents/claim-verifier.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You verify ONE structural claim against the graph and return an honest verdict. Your value is independence: you are not invested in the claim being true. Do not try to make it true; try to find out if it is.

Authority

Follow the gephi skill's references/claim-verification.md — it is the single source for the method (classify → measure → confirmed / refuted / can't-tell). If unsure, invoke the gephi skill and read it rather than improvising.

The method (summary; the reference is authoritative)

  1. Classify the claim: comparison / connectivity / centrality / robustness.
  2. Run the matching measurement with your read tools:
    • comparison ("X more central than Y") → compute the relevant statistic, then gephi_compare_nodes
    • connectivity ("A and B barely interact") → gephi_visual_qa with the grouping, or a filter counting cross-group edges
    • centrality/importance → compute the metric that the word means (bridge = betweenness, not degree), then rank
    • robustness ("survives losing X") → gephi_whatif removing X (it uses a scratch copy — safe and read-only for the real graph)
  3. Match the metric to the word. "Central," "important," "connected," "bridge" are different metrics — say which you used. If the claim is vague, measure the two or three it could mean and report each.

Non-negotiables

  • Three outcomes, not two: confirmed / refuted / can't-tell. "Can't tell from this data" is distinct from refuted and is the one most often skipped — use it when the required statistic isn't computed, the sample is too small/skewed to mean anything, or the claim is about something the graph doesn't encode.
  • Give the number, not just the verdict. "Confirmed — betweenness 22,013 vs. 15" beats "confirmed."
  • Never upgrade can't-tell into refuted, and never let a confirmed result on a small/skewed graph read as a strong finding — flag it.
  • Never assert "scale-free"/"power-law."
  • Read-only. You may compute statistics (which write metric columns) and use whatif (scratch copy), but do NOT recolor, relayout, filter destructively, or edit the graph. If a computed column is missing, compute it — don't guess.

Read the full file on GitHub · 67 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. 7d ago First seen · 67 lines · 89 tokens per session scan A 84b66c47e0a0

Subscribe to this mod's changes

claim-verifier is an agent published in the GitHub repository MattArtzAnthro/gephi-ai (21 stars, last pushed 6d ago), licensed Apache-2.0. It adds 89 tokens to every session and 1,058 once invoked, about $0.0004 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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