wonder-blocks: Skill for Claude Code

.agents/skills/storybook/SKILL.md

storybook is a skill for Claude Code, Codex from Khan/wonder-blocks. It costs 29 tokens per session (3,733 once invoked), scanned A, original, MIT.

Conventions for writing Storybook stories for Wonder Blocks components. Storybook is a tool for displaying and testing UI components in isolation.

In plain words
What is it for?
Use it when creating or editing TypeScript Storybook files such as .stories.tsx or .stories.ts for the Wonder Blocks design system.
Why use it?
It keeps component stories consistently typed and configured, making them easier to read and maintain.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is Khan/wonder-blocks's own configuration. It tells Claude Code and Codex how to work on wonder-blocks 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 wonder-blocks configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import {allThemeModes} from "../../.storybook/modes";.

Reuse

Borrowing it

Nothing to install: this file belongs to Khan/wonder-blocks. 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/Khan/wonder-blocks/main/.agents/skills/storybook/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Khan/wonder-blocks

Made for: Claude Code, Codex.

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 storybook

README.md
[![agentmods](https://agentmods.dev/badge/skills/khan/wonder-blocks/storybook/github.svg)](https://agentmods.dev/skills/khan/wonder-blocks/storybook)
Your own site
<a href="https://agentmods.dev/skills/khan/wonder-blocks/storybook"><img src="https://agentmods.dev/badge/skills/khan/wonder-blocks/storybook/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 storybook

Your own site · 80×15
<a href="https://agentmods.dev/skills/khan/wonder-blocks/storybook"><img src="https://agentmods.dev/badge/skills/khan/wonder-blocks/storybook.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,733 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 509
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00029 $0.03733
Opus 5 $0.00015 $0.01867
Sonnet 5 $0.00006 $0.00747
Haiku 4.5 $0.00003 $0.00373

Measured 11d ago against content hash e889d4055483, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

storybook 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 11d 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/skills/storybook/SKILL.md · 531 lines

How it starts

The opening of the file, as written. The whole thing — 531 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Storybook Best Practices

This guide covers conventions and best practices for creating Storybook stories (.stories.tsx or .stories.ts) in the Wonder Blocks design system.

TypeScript Types

✅ Define story types consistently (avoid any):

type StoryComponentType = StoryObj<typeof Component>;

export const Default: StoryComponentType = {
    args: {
        // props here
    },
};

Default Export Configuration

Meta Configuration

✅ Include all relevant meta properties:

export default {
    title: "Packages / ComponentName / SubComponent",
    component: ComponentName,
    subcomponents: {SubComponent1, SubComponent2}, // If applicable
    parameters: {
        componentSubtitle: (
            <ComponentInfo
                name={packageConfig.name}
                version={packageConfig.version}
            />
        ),
        chromatic: {
            disableSnapshot: false, // or true with reason
        },
    },
    argTypes: ComponentArgTypes,
    args: {
        // Default args for all stories
    },
    decorators: [
        // Optional decorators
    ],
} as Meta<typeof ComponentName>;

Key properties:

  • title: Hierarchical path in Storybook sidebar
  • component: The main component being documented
  • subcomponents: Related components shown in docs
  • parameters: Meta-level configuration (Chromatic, a11y, etc.)
  • argTypes: Control definitions (usually imported from separate file)
  • args: Default values applied to all stories
  • decorators: Layout wrappers applied to all stories

Title Naming Convention

✅ Follow the hierarchy (avoid flat titles like "Button Stories"):

title: "Packages / Button / Button"
title: "Packages / Dropdown / SingleSelect"
title: "Packages / Button / Testing / Snapshots / ActivityButton"

Story Patterns

General Tips for Stories

✅ Follow these best practices when writing stories:

  • The Default story should be interactive and work with the Storybook controls. Users should be able to modify props using the controls panel.
  • Write stories for all possible prop combinations/states. This is very helpful for identifying that all states are styled correctly and any changes can be confirmed in visual regression tests.
  • Disable Chromatic for stories that don't need visual regression tests (we have a limited number of Chromatic snapshots monthly). For example:
    • Stories already covered by another story
    • Stories for testing purposes only
    • Stories that don't have any visual differences from other stories
  • Avoid including specific background colors in Stories so that we can dynamically change the background in Storybook using the Storybook background control in the toolbar. Let users control the background through Storybook's built-in controls.

Read the full file on GitHub · 531 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. 11d ago First seen · 531 lines · 29 tokens per session scan A e889d4055483

Subscribe to this mod's changes

storybook is a skill published in the GitHub repository Khan/wonder-blocks (163 stars, last pushed yesterday), licensed MIT. It adds 29 tokens to every session and 3,733 once invoked, about $0.0001 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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