brain-score

brain-score is a skill for Claude Code, Codex from stuinfla/ruvnet-brain. It costs 138 tokens per session (1,821 once invoked), scanned B, original, no licence file.

A repository scorecard that rates a codebase from 0 to 100 across eight quality areas. It bases the rating on evidence found in the repository.

In plain words
What is it for?
Use it to score a repository, audit its quality, rate a project, or get an evidence-based assessment of how good a codebase is.
Why use it?
It turns a broad question about code quality into a structured review with a single overall score. This helps expose weaknesses that may be missed by an informal assessment.

Skill for Claude CodeCodex

Part of the ruvnet-brain plugin — 9 skills, 5 commands, 7 hooks, 1 MCP server shipped together

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.

agentmods
npx agentmods add skills/stuinfla/ruvnet-brain/brain-score
Any agent
npx skills add stuinfla/ruvnet-brain --skill brain-score
Clone the repo
git clone --depth 1 https://github.com/stuinfla/ruvnet-brain

Made for: Claude Code, Codex.

Or install ruvnet-brain, the plugin that ships this one along with the rest of its 9 skills, 5 commands, 7 hooks, 1 MCP server.

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 brain-score

README.md
[![agentmods](https://agentmods.dev/badge/skills/stuinfla/ruvnet-brain/brain-score.svg)](https://agentmods.dev/skills/stuinfla/ruvnet-brain/brain-score)
Your own site
<a href="https://agentmods.dev/skills/stuinfla/ruvnet-brain/brain-score"><img src="https://agentmods.dev/badge/skills/stuinfla/ruvnet-brain/brain-score.svg" alt="Measured on agentmods" height="20"></a>
Per session 138 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,821 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00138 $0.01821
Opus 5 $0.00069 $0.00911
Sonnet 5 $0.00028 $0.00364
Haiku 4.5 $0.00014 $0.00182

Measured 4d ago against content hash a130c51f4f2e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

brain-score scanned grade B with 1 finding 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 4d 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.

Harvests environment variablesmediumData exfiltration

Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.

(`printenv OPENROUTER_API_KEY` is empty?) and state which side of the line each feature is on.

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

plugin/skills/brain-score/SKILL.md · 102 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 4d ago First seen · 102 lines · 138 tokens per session scan B a130c51f4f2e

Subscribe to this mod's changes

brain-score is a skill published in the GitHub repository stuinfla/ruvnet-brain (65 stars, last pushed today), with no licence file. It adds 138 tokens to every session and 1,821 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it B with 1 finding (harvests environment variables). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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