r-verify-claim

r-verify-claim is a skill for Claude Code from rfxn/rdf. It costs 20 tokens per session (1,145 once invoked), scanned A, original, GPL-2.0.

A verification skill for checking a claim that can be tested against the current codebase. It focuses on whether the claim matches the code as it exists now.

In plain words
What is it for?
Use it to validate statements such as whether a feature, configuration, or behavior is present in a repository.
Why use it?
It helps prevent decisions based on assumptions about code that have not been checked.

Skill for Claude Code

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

Part of the rdf plugin — 37 skills, 37 commands, 8 agents, 6 hooks shipped together

Good fit Use it to validate statements such as whether a feature, configuration, or behavior is present in a repository.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rfxn/rdf/r-verify-claim
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 rfxn/rdf --skill r-verify-claim
Clone the repo
git clone --depth 1 https://github.com/rfxn/rdf

Made for: Claude Code.

Or install rdf, the plugin that ships this one along with the rest of its 37 skills, 37 commands, 8 agents, 6 hooks.

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 r-verify-claim

README.md
[![agentmods](https://agentmods.dev/badge/skills/rfxn/rdf/r-verify-claim/github.svg)](https://agentmods.dev/skills/rfxn/rdf/r-verify-claim)
Your own site
<a href="https://agentmods.dev/skills/rfxn/rdf/r-verify-claim"><img src="https://agentmods.dev/badge/skills/rfxn/rdf/r-verify-claim/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 r-verify-claim

Your own site · 80×15
<a href="https://agentmods.dev/skills/rfxn/rdf/r-verify-claim"><img src="https://agentmods.dev/badge/skills/rfxn/rdf/r-verify-claim.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,145 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 unknown 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 $0.00020 $0.01145
Opus 5.5 $0.00008 $0.00458
Sonnet 5.5 $0.00004 $0.00229
Haiku 4.5 $0.00002 $0.00114

Measured 1mo ago against content hash 2c88a97667ce, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

r-verify-claim 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 1mo 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.

adapters/claude-plugin/output/skills/r-verify-claim/SKILL.md · 130 lines

The source is not reproduced here

Licensed GPL-2.0

The repository is licensed GPL-2.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 1mo ago First seen · 130 lines · 20 tokens per session scan A 2c88a97667ce

Subscribe to this mod's changes

r-verify-claim is a skill published in the GitHub repository rfxn/rdf (20 stars, last pushed 18d ago), licensed GPL-2.0. It adds 20 tokens to every session and 1,145 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-03.

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