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 Ecro/harness-makernpx agentmods add plugins/ecro/harness-maker/marketplacegit clone --depth 1 https://github.com/Ecro/harness-makerGrade A, and why
harness-maker 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.
What it actually says
{
"name": "harness-maker",
"owner": {
"name": "Ecro",
"email": "[email protected]"
},
"description": "Interview-shaped AI coding harness for Claude Code / Cursor / Codex — grade-gated review, block-merge edit preservation, anti-rot crawlers, worktree isolation.",
"plugins": [
{
"name": "harness-maker",
"source": "./",
"description": "Project-tailored harness generator — single source renders to .claude/, .cursor/, and .codex/.",
"author": { "name": "Ecro" },
"homepage": "https://github.com/Ecro/harness-maker",
"repository": "https://github.com/Ecro/harness-maker",
"license": "MIT",
"keywords": [
"claude-code",
"cursor",
"codex",
"harness",
"personalization",
"code-review",
"multi-ide"
]
}
]
}
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.
- yesterday First seen · 29 lines scan A 3513df2d9938
harness-maker is a plugin published in the GitHub repository Ecro/harness-maker (4 stars, last pushed 6d 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 2026-08-31.
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