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signature-replay-analysis

v1.0.0

Detects signature replay vulnerabilities in smart contracts — the vulnerability class affecting 19.63% of signature-using contracts. Covers same-chain, cross-chain, and cross-contract replay attacks, EIP-712 domain separator verification, nonce management analysis, ecrecover edge cases, permit/permit2 safety, and meta-transaction security.

Claude Code1 Skill

By QuillShield125 GitHub starsUpdated 5 months ago

Directory evidence

Runtimes
Claude Code
Parsed components
1 skill or MCP entry
Source updated
Mar 30, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install signature-replay-analysis for Claude Code

Installs for the current user
claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install signature-replay-analysis@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/quillai-network/quillshield_skills

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/signature-replay-analysis/.

Plugin files

plugins/signature-replay-analysis/
├── .claude-plugin/plugin.json
└── skills/signature-replay-analysis/SKILL.md

Included Skills1

signature-replay-analysisskills/signature-replay-analysis/SKILL.md

Detects signature replay vulnerabilities in smart contracts — affecting 19.63% of signature-using contracts. Covers five replay types (same-chain, cross-chain, cross-contract, nonce-skip, expired-signature), EIP-712 domain separator verification, nonce management analysis, ecrecover edge cases (address(0), malleability, s-value), permit/permit2 safety, ERC-1271 contract wallet support, and meta-transaction security. Use when auditing contracts with ecrecover, ECDSA, EIP-712, permit, meta-transactions, multi-sig, or any off-chain signature verification.

Plugin manifests1

plugins/signature-replay-analysis/.claude-plugin/plugin.json
{
  "name": "signature-replay-analysis",
  "version": "1.0.0",
  "description": "Detects signature replay vulnerabilities in smart contracts — the vulnerability class affecting 19.63% of signature-using contracts. Covers same-chain, cross-chain, and cross-contract replay attacks, EIP-712 domain separator verification, nonce management analysis, ecrecover edge cases, permit/permit2 safety, and meta-transaction security.",
  "author": {
    "name": "QuillShield",
    "url": "https://github.com/quillai-network"
  }
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[signature-replay-analysis on Agent Plugins Marketplace](https://pluginsmp.com/plugins/signature-replay-analysis)