better-codebase

A plugin containing code-review skills for improving an existing codebase while preserving its behavior. It favors conclusions supported by evidence instead of unnecessary refactoring.

In plain words
What is it for?
Use it to review code, assess proposed refactors, and identify behavior-preserving improvements supported by the codebase's actual evidence.
Why use it?
It helps developers distinguish worthwhile improvements from changes that only add risk or personal preference.

Plugin for 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.

Claude Code
/plugin marketplace add NicolasYusim/better-codebase
agentmods
npx agentmods add plugins/nicolasyusim/better-codebase/marketplace
Clone the repo
git clone --depth 1 https://github.com/NicolasYusim/better-codebase

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

better-codebase 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.

.claude-plugin/marketplace.json · 28 lines

What it actually says

{
  "name": "better-codebase",
  "description": "Evidence-backed codebase review skills for behavior-preserving improvements.",
  "owner": {
    "name": "Better Codebase contributors"
  },
  "plugins": [
    {
      "name": "better-codebase",
      "source": "./",
      "description": "Codebase review that refuses unjustified refactors.",
      "version": "0.1.0",
      "author": {
        "name": "Better Codebase contributors"
      },
      "homepage": "https://github.com/NicolasYusim/better-codebase#readme",
      "repository": "https://github.com/NicolasYusim/better-codebase",
      "license": "MIT",
      "category": "development",
      "tags": [
        "code-review",
        "refactoring",
        "agent-skills"
      ]
    }
  ]
}
Files

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.

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. yesterday First seen · 28 lines scan A 023031ff2f02

Subscribe to this mod's changes

better-codebase is a plugin published in the GitHub repository NicolasYusim/better-codebase (1 stars, last pushed 23d 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.