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.
/plugin marketplace add sd0xdev/sd0x-harnessnpx agentmods add plugins/sd0xdev/sd0x-harness/marketplacegit clone --depth 1 https://github.com/sd0xdev/sd0x-harnessGrade 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 2d 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.
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."
}
]
}
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.
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.
- 2d ago First seen · 15 lines scan A dcc7b817cb4a
sd0xdev-marketplace is a plugin published in the GitHub repository sd0xdev/sd0x-harness (188 stars, last pushed 3d 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.
Other plugins, from other repositories
cc10x
The Loop Engine — harness and loop engineering plugin for Claude Code. Router-kernel orchestration, workflow artifacts, sub-agent delegation, hook enforcement, Test Honesty Gates, fresh-context verification, and memory that persists. 73% leaner than v11, zero quality regression.
auto-harness
Run Claude Code like a specialist software team: planning, implementation, QA, fix/retest loops, and durable serial or parallel harness state for long-running project delivery.
forge
Multi-agent collaborative development workflow: Planner → Dev → Test → Learn with automatic bug-fix loops, test layering, and experience accumulation.
qiushi-skill
Qiushi Skill: methodology skills for AI agents guided by seeking truth from facts, with Claude Code, Cursor, OpenClaw, Codex, OpenCode, and Hermes guidance.
better-harness
Build an AI-ready engineering system for safe coding-agent delivery and continuous software improvement.
claude
Connect Claude Code to your local OpenLoomi runtime. One-command install, mirror Claude's lifecycle onto the Loomi Pet, and auto-archive every Stop into your OpenLoomi memory. Talks to your local OpenLoomi over HTTP and the OpenLoomi helper CLI. AI provider config is owned by OpenLoomi itself — this plugin never reads.