What is opendesign AGENTS.md?

Repository-specific instructions for working on OpenDesign, an open-source set of web-design skills for coding agents.

They guide changes to skills, plugin configuration, marketplace metadata, and support files for different coding-agent platforms.

They explain the repository layout and rules, so contributors know where skills, plugin settings, and integration files belong.

How manalkaff/opendesign configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to manalkaff/opendesign. 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/manalkaff/opendesign/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/manalkaff/opendesign

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/manalkaff/opendesign/agents-md/github.svg)](https://agentmods.dev/instructions/manalkaff/opendesign/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/manalkaff/opendesign/agents-md"><img src="https://agentmods.dev/badge/instructions/manalkaff/opendesign/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/manalkaff/opendesign/agents-md"><img src="https://agentmods.dev/badge/instructions/manalkaff/opendesign/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 774 This file is loaded in full into every session.

When invoked 774 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00774	$0.00774
Opus 5.5	$0.00310	$0.00310
Sonnet 5.5	$0.00155	$0.00155
Haiku 4.5	$0.00077	$0.00077

Measured 2mo ago against content hash 46af51a20687, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

opendesign 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 2mo 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 · 38 lines

How it starts

The opening of the file, as written. The whole thing — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent instructions for this repository

This repo is OpenDesign — an open-source, skills-based version of Claude Design (the web design mode on claude.ai), packaged as a Claude Code plugin. When working inside this repository, your job is to maintain and extend those skills — not to run them.

Repo layout

skills/<skill-name>/SKILL.md — one folder per skill. Each SKILL.md has YAML frontmatter (name, description) followed by the skill body.
.claude-plugin/plugin.json — Claude Code plugin metadata.
.claude-plugin/marketplace.json — Claude Code marketplace entry. Skills are discovered by convention from ./skills/; do not add a skills[] field (Claude Code's schema rejects it).
.cursor-plugin/plugin.json — Cursor plugin metadata.
.codex-plugin/plugin.json — Codex plugin metadata (richer interface block for app UI).
.opencode/plugins/opendesign.js — OpenCode plugin (registers skills dir + injects opendesign bootstrap into the first user message).
.opencode/INSTALL.md — user-facing install notes for OpenCode.
gemini-extension.json + GEMINI.md — Gemini CLI extension. GEMINI.md @-imports the opendesign skill as context.
package.json — required so OpenCode can install the repo via git+https://.... main points at the OpenCode plugin entry.
README.md — user-facing. The "Available skills" table must match the actual skills shipped.

Rules when editing skills

Skills are written in direct imperative voice. No marketing language, no apologies, no emoji.
Every SKILL.md must start with frontmatter containing name and description. description is a "Use when..." sentence that describes triggering conditions, not a summary of what the skill does.
Keep opendesign/SKILL.md as the entry-point/base skill. Specialist skills (wireframe, make-a-deck, etc.) are loaded on demand by the workflow described there.
If you add a new skill: create skills/<name>/SKILL.md with frontmatter and add a row to the README table. Do not add a per-skill list to .claude-plugin/marketplace.json; Claude Code discovers skills from ./skills/.
If you rename or remove a skill: update the README table and any direct references to that skill in the same change.

Read the full file on GitHub · 38 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.

2mo ago First seen · 38 lines · 774 tokens per session scan A 46af51a20687

Subscribe to this mod's changes

opendesign AGENTS.md is an instructions file published in the GitHub repository manalkaff/opendesign (267 stars, last pushed 4mo ago), licensed MIT. It adds 774 tokens to every session, about $0.0031 per session on Opus 5.5. 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.

Building agents Design and UX

opendesign AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
opendesign AGENTS.mdmanalkaff/opendesign	Instructions file	267	4mo ago	MIT	A	774	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

opendesign: Instructions file for Codex