verifier

verifier is an agent for Claude Code from heathdutton/claude-d2-diagrams. It costs 0 tokens per session (1,786 once invoked), scanned A, original, no licence file.

A specialized assistant for checking whether diagrams are complete and meet quality requirements.

In plain words
What is it for?
Use it to review diagrams for completeness and quality.
Why use it?
It helps catch missing or unclear parts before a diagram is finalized.

Agent for Claude Code

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

Part of the d2 plugin — 1 command, 5 agents, 4 hooks shipped together

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.

agentmods
npx agentmods add agents/heathdutton/claude-d2-diagrams/verifier
Clone the repo
git clone --depth 1 https://github.com/heathdutton/claude-d2-diagrams

Made for: Claude Code.

Or install d2, the plugin that ships this one along with the rest of its 1 command, 5 agents, 4 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 verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/heathdutton/claude-d2-diagrams/verifier.svg)](https://agentmods.dev/agents/heathdutton/claude-d2-diagrams/verifier)
Your own site
<a href="https://agentmods.dev/agents/heathdutton/claude-d2-diagrams/verifier"><img src="https://agentmods.dev/badge/agents/heathdutton/claude-d2-diagrams/verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,786 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.01786
Opus 5 $0.00000 $0.00893
Sonnet 5 $0.00000 $0.00357
Haiku 4.5 $0.00000 $0.00179

Measured 6d ago against content hash 19cf97d37884, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

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 6d 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.

agents/verifier.md · 215 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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. 6d ago First seen · 215 lines · 0 tokens per session scan A 19cf97d37884

Subscribe to this mod's changes

verifier is an agent published in the GitHub repository heathdutton/claude-d2-diagrams (15 stars, last pushed 6mo ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 1,786 tokens. 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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