mean-tester

mean-tester is a plugin for Claude Code from curie-eng/curie. Its manifest loads nothing; the 1 skill it bundles cost 81 tokens per session together, scanned A, original, Apache-2.0.

An agent-testing tool that reads another agent's code bundle, sends up to four probes through Slack, and reports PASS, FAIL, or UNCLEAR with the replies quoted. Slack is a team messaging service used here to ask the target agent questions through its bot.

In plain words
What is it for?
Use it to test another agent's behavior against a Git repository and collect its answers through Slack.
Why use it?
It checks how an agent responds in practice without changing its files, filing issues, fixing code, or approving work. The result gives a separate report for each probe.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to test another agent's behavior against a Git repository and collect its answers through Slack.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add curie-eng/curie
/plugin install mean-tester
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/curie-eng/curie

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 mean-tester

README.md
[![agentmods](https://agentmods.dev/badge/plugins/curie-eng/curie/mean-tester/github.svg)](https://agentmods.dev/plugins/curie-eng/curie/mean-tester)
Your own site
<a href="https://agentmods.dev/plugins/curie-eng/curie/mean-tester"><img src="https://agentmods.dev/badge/plugins/curie-eng/curie/mean-tester/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 mean-tester

Your own site · 80×15
<a href="https://agentmods.dev/plugins/curie-eng/curie/mean-tester"><img src="https://agentmods.dev/badge/plugins/curie-eng/curie/mean-tester.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 The manifest loads nothing itself; its 1 skill cost 81 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

mean-tester 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 5d 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.

examples/mean-tester/.claude-plugin/plugin.json · 29 lines

What it actually says

{
  "name": "mean-tester",
  "version": "0.4.7",
  "description": "Mean tests another agent through readonly probes or marked actions on admitted test installations, checks owned approvals and state, and reports a computed ship verdict. It files nothing and fixes nothing.",
  "license": "Apache-2.0",
  "author": {"name": "CurieTech"},
  "keywords": ["testing", "mean-testing", "quality", "slack"],
  "secrets": ["MEAN_TESTER_SLACK_BOT_TOKEN", "MEAN_TESTER_SLACK_TEAM_ID"],
  "optionalSecrets": ["GITHUB_PERSONAL_ACCESS_TOKEN"],
  "starterPrompts": [
    "test @asset-search bundle asset-search",
    "continue"
  ],
  "toolPolicy": {
    "enforcement": "curie/mcp-tool-policy@1",
    "allow": [
      "slack/slack_post_message",
      "slack/slack_get_thread_replies",
      "slack/slack_get_channel_history",
      "slack/slack_reply_to_thread",
      "github/search_code",
      "github/get_file_contents",
      "github/list_commits"
    ],
    "approvalRequired": [],
    "deny": []
  }
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 81 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. 5d ago Changed · +1 lines 8cb41fff01c9
  2. 14d ago Changed · +1 lines 91b78c6f72e5
  3. 18d ago First seen · 27 lines scan A 4f2637e12fb6

Subscribe to this mod's changes

mean-tester is a plugin published in the GitHub repository curie-eng/curie (36 stars, last pushed today), 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 2026-09-26.