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delightful-design-system: Instructions file for Codex

AGENTS.md

delightful-design-system AGENTS.md is an instructions file for Codex, OpenCode from kylesnav/delightful-design-system. It costs 278 tokens per session, scanned A, original, MIT.

Repository instructions for maintaining the Delightful design system, a shared collection of interface components, colors, motion rules, and animations. They identify the HTML reference pages as the source of truth and describe how the repository should be changed and tested.

In plain words
What is it for?
Use them when editing design-system components, color or motion tokens, animations, redirects, or release versions, including visual checks across light, dark, mobile, and reduced-motion views.
Why use it?
They reduce inconsistent edits across the design-system pages and help protect shared visual rules. They also clarify which files are authoritative and which checks are expected before release.

Instructions file for CodexOpenCode

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

This is kylesnav/delightful-design-system's own configuration. It tells Codex and OpenCode how to work on delightful-design-system 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 delightful-design-system configures →

not rated 5repo 4mo ago A scan 278 tokens original MIT
View source ↗ kylesnav/delightful-design-system kylesnav.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to kylesnav/delightful-design-system. 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/kylesnav/delightful-design-system/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/kylesnav/delightful-design-system

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.

agentmods badge for delightful-design-system AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kylesnav/delightful-design-system/agents-md/github.svg)](https://agentmods.dev/instructions/kylesnav/delightful-design-system/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kylesnav/delightful-design-system/agents-md"><img src="https://agentmods.dev/badge/instructions/kylesnav/delightful-design-system/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.

agentmods 80×15 button for delightful-design-system AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/kylesnav/delightful-design-system/agents-md"><img src="https://agentmods.dev/badge/instructions/kylesnav/delightful-design-system/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 278 This file is loaded in full into every session.
When invoked 278 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00278 $0.00278
Opus 5.5 $0.00111 $0.00111
Sonnet 5.5 $0.00056 $0.00056
Haiku 4.5 $0.00028 $0.00028

Measured 2mo ago against content hash b457c4f9440f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

delightful-design-system 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 · 32 lines

What it actually says

Delightful

This repo powers https://delightful.build/ and contains the source-of-truth HTML references for the Delightful design system.

Source of Truth

  • index.html is the GitHub Pages root redirect to delightful-design-system.html.
  • delightful-design-system.html is the canonical component/token/interaction reference.
  • delightful-color.html, delightful-motion.html, and delightful-animation.html are companion references.
  • Standalone platform ports live in sibling repos. Do not add local copies back here.

Validate

npm install
npm test

Use Browser screenshots for visual changes. Check the root redirect, design-system, color, motion, and animation pages in light, dark, mobile, and reduced-motion views when their shared tokens or layout systems change.

Editing Rules

  • Colors use OKLCH in source.
  • Keep token flow primitives -> semantic -> component.
  • HTML files are self-contained with inline CSS/JS.
  • Keep CNAME unchanged.
  • scripts/tokens.mjs is kept for token extraction. The old monorepo sync workflow is retired.

Release Notes

npm run bump <version> updates only this repo's root package version and creates a site tag. Platform ports are released from their own repos.

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. 2mo ago First seen · 32 lines · 278 tokens per session scan A b457c4f9440f

Subscribe to this mod's changes

delightful-design-system AGENTS.md is an instructions file published in the GitHub repository kylesnav/delightful-design-system (5 stars, last pushed 4mo ago), licensed MIT. It adds 278 tokens to every session, about $0.0011 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 2026-08-31.

Design and UXFrontendcolor-themecssdesign-systemdesign-tokensneo-brutalistoklch
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