noir

noir is a skill for Claude Code from austintgriffith/ethskills. It costs 47 tokens per session (7,112 once invoked), scanned C, original, no licence file.

Guidance for building privacy-preserving applications on EVM networks with Noir. EVM means Ethereum-compatible blockchain networks, while Noir is a language and toolchain for zero-knowledge applications.

In plain words
What is it for?
Use it to build Noir privacy apps, commitment-nullifier systems, Solidity verifiers, tree-based state, and NoirJS integrations.
Why use it?
It helps choose privacy patterns and connect private proofs to Solidity contracts and application state.

Skill for Claude Code

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

Part of the ethskills plugin — 28 skills 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 skills/austintgriffith/ethskills/noir
Any agent
npx skills add austintgriffith/ethskills --skill noir
Clone the repo
git clone --depth 1 https://github.com/austintgriffith/ethskills

Made for: Claude Code.

Or install ethskills, the plugin that ships this one along with the rest of its 28 skills.

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 noir

README.md
[![agentmods](https://agentmods.dev/badge/skills/austintgriffith/ethskills/noir.svg)](https://agentmods.dev/skills/austintgriffith/ethskills/noir)
Your own site
<a href="https://agentmods.dev/skills/austintgriffith/ethskills/noir"><img src="https://agentmods.dev/badge/skills/austintgriffith/ethskills/noir.svg" alt="Measured on agentmods" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,112 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 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 $0.00047 $0.07112
Opus 5 $0.00023 $0.03556
Sonnet 5 $0.00009 $0.01422
Haiku 4.5 $0.00005 $0.00711

Measured 6d ago against content hash a966954e3ad4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade C, and why

noir scanned grade C with 2 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -L https://raw.githubusercontent.com/noir-lang/noirup/refs/heads/main/install | bash

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -L https://raw.githubusercontent.com/noir-lang/noirup/refs/heads/main/install | bash
noir/SKILL.md · 645 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 · 645 lines · 47 tokens per session scan C a966954e3ad4

Subscribe to this mod's changes

noir is a skill published in the GitHub repository austintgriffith/ethskills (280 stars, last pushed 17d ago), with no licence file. It adds 47 tokens to every session and 7,112 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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