What is claude-code-plugin?

A plugin that installs and manages HOL Guard for Claude Code, an add-on that checks risky development actions. The guard covers commands, secrets, packages, tool connections, and software-supply-chain activity.

Use it to set up the guard, check its status, and apply runtime protections while working in Claude Code.

It adds checks around operations that could expose secrets, install unsafe dependencies, or introduce other security and supply-chain risks.

claude-code-plugin — Plugin by hashgraph-online

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.

Claude Code

/plugin marketplace add hashgraph-online/hol-guard

agentmods

npx agentmods add plugins/hashgraph-online/hol-guard/claude-code-plugin

Clone the repo

git clone --depth 1 https://github.com/hashgraph-online/hol-guard

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

claude-code-plugin 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 yesterday.

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.

integrations/claude-code-plugin/.claude-plugin/plugin.json · 22 lines

What it actually says

{
  "$schema": "https://json.schemastore.org/claude-code-plugin-manifest.json",
  "name": "hol-guard",
  "displayName": "HOL Guard",
  "version": "0.1.0",
  "description": "Install and manage the local-first HOL Guard package for Claude Code. This plugin guides setup and status checks; HOL Guard itself installs and owns runtime security hooks for risky commands, secrets, packages, MCP, and supply-chain activity.",
  "author": {
    "name": "Hashgraph Online"
  },
  "homepage": "https://hol.org/guard",
  "repository": "https://github.com/hashgraph-online/hol-guard",
  "license": "Apache-2.0",
  "keywords": [
    "security",
    "guardrails",
    "prompt-injection",
    "supply-chain",
    "mcp",
    "claude-code"
  ]
}

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.

yesterday First seen · 22 lines scan A dd21865f65c1

Subscribe to this mod's changes

claude-code-plugin is a plugin published in the GitHub repository hashgraph-online/hol-guard (504 stars, last pushed 2d ago), licensed Apache-2.0. 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.

Security agent-security ai-agent-security ai-agents codex mcp

claude-code-plugin

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other plugins, from other repositories

safe-example-plugin

trustshell

trustshell

emilia-protocol

marketplace

ryk