Institut-du-Numerique-Responsable

Green Codex — Development skill for Claude Code

Development community

Skill pour Codex pour appliquer les règles NR.

How to install Green Codex

This entry records only its repository, not the path inside it, so there is no exact command to give. Open Institut-du-Numerique-Responsable/green-codex and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Green Codex does

Skill pour Codex pour appliquer les règles NR.

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README

Green Codex

[![Version](https://img.shields.io/github/v/release/Institut-du-Numerique-Responsable/green-codex?sort=semver)](https://github.com/Institut-du-Numerique-Responsable/green-codex/releases) [![CI](https://github.com/Institut-du-Numerique-Responsable/green-codex/actions/workflows/validate.yml/badge.svg)](https://github.com/Institut-du-Numerique-Responsable/green-codex/actions/workflows/validate.yml) [![License](https://img.shields.io/badge/license-MIT%20%2B%20CC%20BY%204.0-yellow.svg)](LICENSE) [![INR](https://img.shields.io/badge/INR-Institut%20du%20Num%C3%A9rique%20Responsable-4CAF50?logo=leaf&style=flat)](https://institutnr.org/)

Green Codex is a Codex skill for applying Green IT and responsible digital practices while designing, implementing, reviewing, or auditing software and digital services.

It distils guidance from RGESN, GR491, Opquast, and RGAA into a practical workflow for Codex. The official acronyms are kept unchanged.

What it covers

digital and software eco-design;
energy, data, storage, network, and infrastructure efficiency;
accessible and resilient user interfaces;
responsible use of AI, including model size, context, caching, and data minimisation;
14 responsible Codex usage practices for context, briefs, durable guidance, verification, and proportionate compute;
evidence-based audits with severity, confidence, and verification steps;
service utility, device longevity, inclusive access, retirement and rebound effects;
reproducible measurement separating resource proxies, energy and modelled environmental impacts.

How the NR rules are applied

Green Codex does not label a language, framework, cloud provider, or database as inherently “green”. The Institut du Numérique Responsable (NR) practices are applied to the way a technology is designed, configured and operated: useful functionality first, then lower CPU and memory work, fewer requests and bytes, bounded storage, accessibility, security, and a documented