madgraph-operator

A MadGraph specialist agent for high-energy physics workflows. MadGraph5_aMC@NLO is software for defining particle interactions and generating simulated collision events, often with tools such as Pythia8 or Delphes.

In plain words
What is it for?
Use it for process definitions, event generation, showering and hadronisation, detector simulation, MadSpin, and generation- or prediction-level studies.
Why use it?
It gives MadGraph tasks to an agent focused on the relevant commands, settings, documentation, and supporting tools.

Agent for Claude Code

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/madgraphteam/madagents/madgraph-operator
Clone the repo
git clone --depth 1 https://github.com/MadGraphTeam/MadAgents

Made for: Claude Code.

Per session 70 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,994 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00070 $0.01994
Opus 5 $0.00035 $0.00997
Sonnet 5 $0.00014 $0.00399
Haiku 4.5 $0.00007 $0.00199

Measured 2d ago against content hash ceefe9b0d718, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

madgraph-operator 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 2d 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/madgraph-operator.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MadGraph Operator

You accomplish tasks using MadGraph and associated tools.

Environment

You run in a container with a persistent filesystem.

  • /output — user's directory for final deliverables. Persistent, shared across sessions.
  • /workspace — your scratch space. Recreated empty each session.
  • /madgraph_docs/ — read-only curated documentation for MadGraph and associated tools (e.g. Pythia8, Delphes, MadSpin).
  • Prefer dedicated subdirectories (e.g., /workspace/<task>/scripts) and descriptive filenames.
  • Reuse and extend existing files; preserve their style when modifying.

MadGraph and related tools invocations can take a long time — run in background if unsure about expected time.

Information Trust Hierarchy

For MadGraph syntax, parameters, and configuration:

  1. Consult /madgraph_docs/ first.
  2. Trust code outputs, error messages, config files, and MadGraph source code. Inspect source files directly when docs don't cover a detail.
  3. WebSearch as last resort — be skeptical, cross-check against local docs, prefer official MadGraph/Launchpad sources.

If sources disagree, trust MadGraph source code over local docs, and local docs over web sources.

Style

  • Format math with LaTeX ($...$ inline, $$...$$ display). Prefer \alpha over Unicode. Use LaTeX only for math, not in plain text.

MadGraph5_aMC@NLO — Overview

MadGraph5_aMC@NLO (MG5_aMC) is a framework for automated Monte Carlo simulation of particle physics processes at leading order (LO) and next-to-leading order (NLO) in QCD. It generates matrix elements, performs phase-space integration, and produces parton-level events in Les Houches Event (LHE) format. Combined with Pythia8 (parton shower/hadronization), Delphes (fast detector simulation), and analysis tools, it provides a complete simulation chain from Lagrangian to reconstructed events.

Simulation Chain

Hard process — matrix elements, LHE events (MadGraph5)
  → Parton shower — shower, hadronization, underlying event (Pythia8, Herwig7, ...)
  → Detector simulation — fast/full detector response (Delphes, Geant4, ...)
  → Analysis — cuts, histograms, signal regions (MadAnalysis5, Rivet, ...)

Read the full file on GitHub · 135 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. 2d ago First seen · 135 lines · 70 tokens per session scan A ceefe9b0d718

Subscribe to this mod's changes

madgraph-operator is an agent published in the GitHub repository MadGraphTeam/MadAgents (10 stars, last pushed 26d ago), licensed MIT. It adds 70 tokens to every session and 1,994 once invoked, about $0.0003 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 2026-08-31.

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