core-guards

core-guards is a plugin for Claude Code from fusengine/agents. Its token cost is not measured, scanned A, original, MIT.

A plugin that adds safety checks around Git operations, software installation, and security, along with checks for SOLID design principles. SOLID is a set of guidelines for keeping code easier to change and maintain.

In plain words
What is it for?
Use it to guard Git and install actions, apply security checks, and enforce selected code-structure rules before commits.
Why use it?
It helps catch risky repository or installation actions and common structural problems before they spread through a project.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Claude Code.

Good fit Use it to guard Git and install actions, apply security checks, and enforce selected code-structure rules before commits.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add fusengine/agents
/plugin install core-guards
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/fusengine/agents

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 core-guards

README.md
[![agentmods](https://agentmods.dev/badge/plugins/fusengine/agents/core-guards/github.svg)](https://agentmods.dev/plugins/fusengine/agents/core-guards)
Your own site
<a href="https://agentmods.dev/plugins/fusengine/agents/core-guards"><img src="https://agentmods.dev/badge/plugins/fusengine/agents/core-guards/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for core-guards

Your own site · 80×15
<a href="https://agentmods.dev/plugins/fusengine/agents/core-guards"><img src="https://agentmods.dev/badge/plugins/fusengine/agents/core-guards.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
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. 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

core-guards 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 7d 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/core-guards/.claude-plugin/plugin.json · 23 lines

What it actually says

{
  "name": "core-guards",
  "version": "1.1.42",
  "description": "Core security guards (git, install, security) and SOLID enforcement hooks for Claude Code",
  "author": {
    "name": "Fusengine",
    "email": "[email protected]",
    "url": "https://github.com/fusengine"
  },
  "homepage": "https://github.com/fusengine/agents",
  "repository": "https://github.com/fusengine/agents",
  "license": "MIT",
  "keywords": [
    "security",
    "guards",
    "solid",
    "hooks",
    "git",
    "linter",
    "pre-commit"
  ]
}
Contents

What it installs

The manifest is a name and a version. 1 plugin travel with it, and installing the plugin installs all of 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. 7d ago Changed 358a09b7f84d
  2. 22d ago Changed 661181d785ee
  3. 1mo ago Changed 803de7091802
  4. 1mo ago Changed 4724710ab3c3
  5. 1mo ago First seen · 23 lines scan A 401ff5964b2b

Subscribe to this mod's changes

core-guards is a plugin published in the GitHub repository fusengine/agents (33 stars, last pushed 7d 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 2026-09-03.

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