sponsio-claude-code

sponsio-claude-code is a plugin for Claude Code from SponsioLabs/Sponsio. Its manifest loads nothing; the 1 skill, 1 hook it bundles cost 263 tokens per session together, scanned A, original, Apache-2.0.

A Claude Code plugin that checks every tool call against runtime safety rules stored in per-plugin libraries. Claude Code is a coding assistant that can use tools to act on a project.

In plain words
What is it for?
Applying contract-based guardrails to tool calls made by Claude Code plugins.
Why use it?
It can stop tool calls that violate the configured rules, helping enforce safety requirements during an agent session. The supplied information does not describe the individual rules included.

Plugin for Claude Code

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

Good fit Applying contract-based guardrails to tool calls made by Claude Code plugins.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add SponsioLabs/Sponsio/plugin install sponsio-claude-code
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/SponsioLabs/Sponsio

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 sponsio-claude-code

README.md
[![agentmods](https://agentmods.dev/badge/plugins/sponsiolabs/sponsio/sponsio-claude-code.svg)](https://agentmods.dev/plugins/sponsiolabs/sponsio/sponsio-claude-code)
Your own site
<a href="https://agentmods.dev/plugins/sponsiolabs/sponsio/sponsio-claude-code"><img src="https://agentmods.dev/badge/plugins/sponsiolabs/sponsio/sponsio-claude-code.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill, 1 hook cost 263 tokens a session between them.
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

sponsio-claude-code 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/sponsio-claude-code/.claude-plugin/plugin.json · 11 lines

What it actually says

{
  "name": "sponsio-claude-code",
  "description": "Runtime contract guardrails for every tool call in your Claude Code session — backed by per-plugin contract libraries under ~/.sponsio/plugins/.",
  "version": "0.1.0",
  "author": {
    "name": "Sponsio Labs"
  },
  "homepage": "https://github.com/SponsioLabs/Sponsio",
  "license": "Apache-2.0"
}
Contents

What it installs

The manifest is a name and a version. 1 skill, 1 hook travel with it, and installing the plugin installs all of them — 263 tokens a session between 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 First seen · 11 lines scan A 339241c28160

Subscribe to this mod's changes

sponsio-claude-code is a plugin published in the GitHub repository SponsioLabs/Sponsio (438 stars, last pushed 2d 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.