proxy-upgrade-safety

proxy-upgrade-safety is a plugin for Claude Code from quillai-network/quillshield_skills. Its manifest loads nothing; the 1 skill it bundles cost 96 tokens per session together, scanned A, original, MIT.

A security checker for upgradeable Ethereum smart contracts, where a proxy keeps the stored data and forwards actions to a separate implementation. It checks Transparent, UUPS, Beacon, Diamond, and Minimal proxy designs.

In plain words
What is it for?
Use it when reviewing proxy-based contracts, implementation upgrades, initialization, delegatecall behavior, or Diamond facet selectors.
Why use it?
It helps find mistakes that can corrupt stored data, let attackers take over upgrades, or make contract functions conflict. These problems can be difficult to spot when the proxy and implementation are separate.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it when reviewing proxy-based contracts, implementation upgrades, initialization, delegatecall behavior, or Diamond facet selectors.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add quillai-network/quillshield_skills/plugin install proxy-upgrade-safety
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/quillai-network/quillshield_skills

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 proxy-upgrade-safety

README.md
[![agentmods](https://agentmods.dev/badge/plugins/quillai-network/quillshield_skills/proxy-upgrade-safety.svg)](https://agentmods.dev/plugins/quillai-network/quillshield_skills/proxy-upgrade-safety)
Your own site
<a href="https://agentmods.dev/plugins/quillai-network/quillshield_skills/proxy-upgrade-safety"><img src="https://agentmods.dev/badge/plugins/quillai-network/quillshield_skills/proxy-upgrade-safety.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 96 tokens a session between them.
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.
Security

Grade A, and why

proxy-upgrade-safety 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 8d 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.

plugins/proxy-upgrade-safety/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "proxy-upgrade-safety",
  "version": "1.0.0",
  "description": "Detects vulnerabilities in upgradeable proxy smart contracts — storage layout collisions, uninitialized implementations, function selector clashing, and upgrade path safety issues. Covers Transparent, UUPS, Beacon, Diamond (EIP-2535), and Minimal proxy patterns. Critical for the 54.2% of Ethereum contracts that use proxy architecture.",
  "author": {
    "name": "QuillShield",
    "url": "https://github.com/quillai-network"
  }
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 96 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. 8d ago First seen · 10 lines scan A 3679296d9397

Subscribe to this mod's changes

proxy-upgrade-safety is a plugin published in the GitHub repository quillai-network/quillshield_skills (121 stars, last pushed 5mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.

Related

Other plugins, from other repositories