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sd0xdev-marketplace

sd0xdev-marketplace is a plugin for Claude Code from sd0xdev/sd0x-harness. Its token cost is not measured, scanned A, original, MIT.

A Claude Code plugin for harness engineering, meaning checks and safeguards around how an agent works on code.

In plain words
What is it for?
Use it for reminder hooks, behaviour gates, and fail-closed safety checks during coding work.
Why use it?
It helps review important actions, enforce behaviour checks, and stop when required safety conditions are not met.

Plugin for Claude Code

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

not rated 194repo changed 1mo ago A scan tokens not measured original MIT

Good fit Use it for reminder hooks, behaviour gates, and fail-closed safety checks during coding work.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add sd0xdev/sd0x-harness
/plugin install sd0xdev-marketplace
View source ↗ sd0xdev/sd0x-harness
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/sd0xdev/sd0x-harness

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 sd0xdev-marketplace

README.md
[![agentmods](https://agentmods.dev/badge/plugins/sd0xdev/sd0x-harness/marketplace/github.svg)](https://agentmods.dev/plugins/sd0xdev/sd0x-harness/marketplace)
Your own site
<a href="https://agentmods.dev/plugins/sd0xdev/sd0x-harness/marketplace"><img src="https://agentmods.dev/badge/plugins/sd0xdev/sd0x-harness/marketplace/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 sd0xdev-marketplace

Your own site · 80×15
<a href="https://agentmods.dev/plugins/sd0xdev/sd0x-harness/marketplace"><img src="https://agentmods.dev/badge/plugins/sd0xdev/sd0x-harness/marketplace.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

sd0xdev-marketplace 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 1mo 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.

.claude-plugin/marketplace.json · 20 lines

What it actually says

{
  "name": "sd0xdev-marketplace",
  "owner": { "name": "sd0xdev" },
  "plugins": [
    {
      "name": "sd0x-dev-flow",
      "source": {
        "source": "github",
        "repo": "sd0xdev/sd0x-harness"
      },
      "description": "Harness engineering for Claude Code — reminder-layer review hooks, behaviour-layer gates, and fail-closed safety where it counts."
    },
    {
      "name": "agentctl",
      "source": "./mods/agentctl",
      "description": "Optional Agent Control Plane mod for one Claude Code session: task scope, refusal before execution, evidence that goes stale, model-free hand-over. A control and a display, not an isolation boundary."
    }
  ]
}
Contents

The plugins it lists here

This marketplace lists 1 plugin kept in the same repository. Each has its own page, its own measurements and its own install command.

Files

What ships with it

1 file beside marketplace.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago Changed · +5 lines e9e9097a7ebd
  2. 2mo ago First seen · 15 lines scan A dcc7b817cb4a

Subscribe to this mod's changes

sd0xdev-marketplace is a plugin published in the GitHub repository sd0xdev/sd0x-harness (194 stars, last pushed 1mo 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.

Building agentsClaude Codeagent-harnessclaude-code-plugincodexharness-engineeringskills
Related

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