cardano-org: Instructions file for Codex

AGENTS.md

cardano-org AGENTS.md is an instructions file for Codex, OpenCode from cardano-foundation/cardano-org. It costs 1,180 tokens per session, scanned A, original, Apache-2.0.

Onboarding instructions for AI agents working on cardano.org, the website for the Cardano blockchain project. They explain the repository layout, contribution process, and project principles.

In plain words
What is it for?
Use them when planning, implementing, or reviewing changes in the cardano.org repository.
Why use it?
They provide project-specific boundaries and setup rules, including using Yarn instead of npm, before an agent edits the site.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is cardano-foundation/cardano-org's own configuration. It tells Codex and OpenCode how to work on cardano-org itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything cardano-org configures →

Reuse

Borrowing it

Nothing to install: this file belongs to cardano-foundation/cardano-org. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/cardano-foundation/cardano-org/staging/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/cardano-foundation/cardano-org

Made for: Codex, OpenCode.

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When invoked 1,180 The same file — it is already loaded in full.
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.
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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 5.1 $0.01180 $0.01180
Opus 5 $0.00590 $0.00590
Sonnet 5 $0.00236 $0.00236
Haiku 4.5 $0.00118 $0.00118

Measured 3d ago against content hash 0d7b090f65e1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

cardano-org AGENTS.md 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 3d 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.

AGENTS.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md - AI Agent Onboarding for cardano.org

Use yarn for all dependency and script management, not npm: the repo is pinned to yarn.lock, and PRs must not modify that file.

Welcome! This guide enables AI agents (and their operators) to contribute productively and safely to cardano.org. It covers philosophy, repo map, quickstart, quality gates, guardrails, and content rules.


Project Philosophy

  • Collective Ownership: cardano.org is managed by a community, not a single entity. All contributions are welcome and valued.
  • Incremental Evolution: Prefer small, reviewable, continuously shipped changes. Avoid large, disruptive changes unless discussed and agreed.
  • Discussion First: For any non-trivial change, start with a discussion before implementation.

Essential Resources

  • README.md: Project overview, setup, and contribution boundaries.
  • CONTRIBUTING.md: Contribution guidelines and workflow.
  • docs/get-involved/: Guides for all types of contributions (content, code, design, data, community).
  • docs/get-involved/style-guide.md: Editorial style guide (spelling, capitalisation, brand-name conventions). Mandatory for all content and code comments.
  • glossary/: Per-term definitions rendered at /glossary/<slug>. Reference these for consistent terminology across docs and UI copy.

Repository Map (Key Folders)

  • src/ - Source code (React components, logic)
  • docs/ - Documentation, guides, editorial content
  • blog/ - Blog posts
  • static/ - Static assets (images, downloads)
  • scripts/ - Utility scripts
  • docusaurus.config.js - Docusaurus site config
  • sidebars.js - Sidebar/navigation config
  • variables.js - Repository and branch URLs used by build scripts
  • src/css/custom.css - Global styles and design tokens (see docs/get-involved/design-tokens.md)
  • package.json - Scripts, dependencies
  • netlify.toml - Netlify build/deploy config

Read the full file on GitHub · 121 lines

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. 3d ago Changed · -15 lines · -44 tokens per session 0d7b090f65e1
  2. 8d ago First seen · 136 lines · 1,224 tokens per session scan A 69681e81640c

Subscribe to this mod's changes

cardano-org AGENTS.md is an instructions file published in the GitHub repository cardano-foundation/cardano-org (101 stars, last pushed today), licensed Apache-2.0. It adds 1,180 tokens to every session, about $0.0059 per session on Opus 5. 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.

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