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 datathings/marketplacenpx agentmods add plugins/datathings/marketplace/greycat-cgit clone --depth 1 https://github.com/datathings/marketplaceGrade A, and why
greycat-c 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 3d 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": "greycat-c",
"version": "3.0.4",
"description": "Comprehensive reference for GreyCat C API and GCL Standard Library. Covers native function implementation, tensor operations, scheduling, I/O, statistics, and all std modules.",
"author": {
"name": "Datathings",
"email": "[email protected]"
},
"license": "MIT",
"repository": "https://github.com/datathings/marketplace",
"keywords": ["greycat", "c-api", "standard-library", "native-development", "gcl", "tensor", "scheduler", "data-processing", "io-operations", "statistics"],
"skills": "./skills/"
}
What it installs
The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 184 tokens a session between them. Each is measured on its own page, and each can be installed alone.
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.
- 3d ago First seen · 14 lines scan A e272333e23a9
greycat-c is a plugin published in the GitHub repository datathings/marketplace (11 stars, last pushed 5d 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.
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