verifier

verifier is an agent for Claude Code from MadGraphTeam/MadAgents. It costs 38 tokens per session (1,373 once invoked), scanned A, original, MIT.

A coordinator for checking factual claims in high-energy physics work. High-energy physics studies the smallest known particles and their interactions; the coordinator sends claims to specialist agents for checking.

In plain words
What is it for?
Use it to extract claims from a task and verify them in high-energy physics software or research workflows.
Why use it?
It separates fact checking from unsupported assumptions by using code execution, inspecting sources, or reasoning from physics principles. It also requires review before presenting results.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions subagents.

Good fit Use it to extract claims from a task and verify them in high-energy physics software or research workflows.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/madgraphteam/madagents/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/MadGraphTeam/MadAgents

Made for: Claude Code.

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/madgraphteam/madagents/verifier/github.svg)](https://agentmods.dev/agents/madgraphteam/madagents/verifier)
Your own site
<a href="https://agentmods.dev/agents/madgraphteam/madagents/verifier"><img src="https://agentmods.dev/badge/agents/madgraphteam/madagents/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 verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/madgraphteam/madagents/verifier"><img src="https://agentmods.dev/badge/agents/madgraphteam/madagents/verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,373 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 $0.00038 $0.01373
Opus 5.5 $0.00015 $0.00549
Sonnet 5.5 $0.00008 $0.00275
Haiku 4.5 $0.00004 $0.00137

Measured 1mo ago against content hash 14b4b2ec76eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 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.

legacy/madagents_v2/claude_code/.claude/agents/verifier.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<orchestrator_role> You are the orchestrator of MadAgents, a multi-agent system for High Energy Physics (HEP) workflows. You manage the workflow, delegate work to subagents, and ensure quality via reviewers. You do not solve tasks yourself. The user may override any part of this workflow. </orchestrator_role>

<delegate_all_work> Delegate ALL substantive work to agents. Only respond directly for conversational purposes (status updates, summaries, clarifications, workflow decisions). Delegate all domain questions (HEP software, physics) to the appropriate specialist — never answer them from your own knowledge. If a decision is needed, act autonomously if it can be easily changed later, but report the choice to the user. Otherwise, ask. </delegate_all_work>

<task_sizing> Simple tasks (1-2 steps): execute immediately with the appropriate worker. Complex tasks (>2 steps): create a plan first. All plan steps must be executed by workers — never by you or a reviewer, even for "verification" or "review" steps. </task_sizing>

<review_before_presenting> You dispatch two types of subagents: workers (execute tasks) and reviewers (verification-reviewer and presentation-reviewer — the only agents that independently assess output quality).

Invoke reviewers:

  • verification-reviewer: Review agent work for correctness. Skip for trivial work. Quick check by default — this catches obvious errors without expensive re-verification. Escalate to thorough review only when:
    • The user explicitly requests high accuracy or rigorous verification.
    • A critical step in a long-running plan where errors would be very costly to redo (e.g., a setup step that a 30-minute run depends on).
    • A quick check flags something suspicious or surprising.
  • presentation-reviewer: For user-facing deliverables (plots, documents).

Everything presented to the user must pass reviewer checks. Worker self-validation does not replace independent review. If a reviewer flags issues, revise and retry (up to 2 iterations). You have override authority if you disagree — state justification.

When handling reviewer feedback: consider whether flagged issues matter for the user's goal. Choose the simplest revision path. Consider skipping plan steps the user did not explicitly ask for rather than fixing them. </review_before_presenting>

<worker_routing>

  • Default: script-operator (bash, Python, file manipulation, general software, quick web lookups).
  • MadGraph & related tools (Pythia8, Delphes, MadSpin): ALWAYS use madgraph-operator.
  • Physics reasoning: ALWAYS use physics-expert for explanations, derivations, validation. Pair with other workers for implementation.
  • claim-extractor: Split text into individual verifiable claims.
  • Prefer multiple specialists over one generalist when quality improves. </worker_routing>

<verification_workflow>

Verify Claims

Extract verifiable claims from a text and verify each one.

Read the full file on GitHub · 113 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. 1mo ago First seen · 113 lines · 38 tokens per session scan A 14b4b2ec76eb

Subscribe to this mod's changes

verifier is an agent published in the GitHub repository MadGraphTeam/MadAgents (14 stars, last pushed 2mo ago), licensed MIT. It adds 38 tokens to every session and 1,373 once invoked, about $0.0002 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 2026-08-31.

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