describe-component

A command that produces a structured description of a design-system component, including its purpose, inputs, composition, accessibility, misuse warnings, and examples.

In plain words
What is it for?
Use it to document component properties, defaults, usage rules, accessibility requirements, anti-patterns, code examples, and machine-readable metadata.
Why use it?
It gives an AI agent enough consistent information to choose and configure the component correctly without guessing.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/murphytrueman/design-system-ops/describe-component
Clone the repo
git clone --depth 1 https://github.com/murphytrueman/design-system-ops
Per session 8 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 273 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00008 $0.00273
Opus 5 $0.00004 $0.00137
Sonnet 5 $0.00002 $0.00055
Haiku 4.5 $0.00001 $0.00027

Measured yesterday against content hash fe4399462920, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

describe-component 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 yesterday.

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.

commands/describe-component.md · 25 lines

What it actually says

Run the ai-component-description skill to generate a structured, machine-readable description for a design system component.

Load the ai-component-description skill from ${CLAUDE_PLUGIN_ROOT}/skills/ai-component-description/SKILL.md and follow its complete workflow.

Before starting, read the knowledge notes declared in the skill's frontmatter references: field, located in ${CLAUDE_PLUGIN_ROOT}/knowledge-notes/.

Produce a six-section description:

  1. Purpose — what the component does and when to use it
  2. Props — every prop with type, default, and guidance
  3. Anti-patterns — what NOT to do (use the inference guide for new components)
  4. Composition rules — how it works with other components
  5. Accessibility — keyboard, screen reader, ARIA, focus
  6. Usage examples — concrete code showing correct usage

Also generate the structured JSON metadata for machine-readable manifests.

Run the self-test: could an AI agent select this component correctly, configure it, and avoid misuse based solely on this description?

The component to describe: $ARGUMENTS

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. yesterday First seen · 25 lines · 8 tokens per session scan A fe4399462920

Subscribe to this mod's changes

describe-component is a command published in the GitHub repository murphytrueman/design-system-ops (172 stars, last pushed 10d ago), licensed MIT. It adds 8 tokens to every session and 273 once invoked, about $0.0000 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.