How do I install the Noir Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/noir/SKILL.md and restart Claude Code. Both flows are detailed at https://claudskills.com/install/.

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

ClaudSkills / Security / crypto-keymgmt

Noir

Category: Security · Sub-category: crypto-keymgmt · Last updated: 2026-05-21

type:audit type:integration

Zero-knowledge circuit design with Noir (Aztec's ZK DSL). TRIGGER when: working with .nr files, Nargo.toml, ZK circuits/proofs, Aztec contracts, zoir extension, or discussing zero-knowledge proof design. Covers circuit architecture, constraint optimization, ZK-specific security, and Aztec integration. DO NOT TRIGGER when: only Noir language syntax is needed (droo-stack handles that), or working with Solidity (use solidity-audit skill).

From the source SKILL.md

Domain knowledge for zero-knowledge circuit design with Noir. For Noir language syntax patterns (types, modules, generics), see droo-stack's noir-patterns rule. This skill covers the why of ZK: circuit architecture, security pitfalls, Aztec integration, and testing strategy.

What this skill does

Noir is a community-contributed Claude Code skill in the crypto-keymgmt sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/noir/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Noir Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/noir
curl -L https://claudskills.com/skills/noir/SKILL.md \
  -o ~/.claude/skills/noir/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/noir/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/noir/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\noir\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

Source: https://github.com/DROOdotFOO/agent-skills/blob/HEAD/skills/noir/SKILL.md
License: MIT
Author: DROOdotFOO
Website: https://droo.foo/

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Noir

From the source SKILL.md

What this skill does

Who uses this skill

How to install

Manual install (2 steps)

One-click install via the desktop app

Attribution & license

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