canon-cards

canon-cards is a skill for Claude Code, Codex from Dragoon0x/canon. It costs 83 tokens per session (2,164 once invoked), scanned A, original, MIT.

A set of guidelines for bounded interface sections that group related content, often with an image, title, description, and actions.

In plain words
What is it for?
Use it when designing product tiles, item grids, content cards, card actions, spacing, borders, shadows, and hover states.
Why use it?
It helps decide when a card improves scanning and when it would unnecessarily break up a list or flowing text.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

Good fit Use it when designing product tiles, item grids, content cards, card actions, spacing, borders, shadows, and hover states.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dragoon0x/canon/canon-cards
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.

Any agent
npx skills add Dragoon0x/canon --skill canon-cards
Clone the repo
git clone --depth 1 https://github.com/Dragoon0x/canon

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 canon-cards

README.md
[![agentmods](https://agentmods.dev/badge/skills/dragoon0x/canon/canon-cards/github.svg)](https://agentmods.dev/skills/dragoon0x/canon/canon-cards)
Your own site
<a href="https://agentmods.dev/skills/dragoon0x/canon/canon-cards"><img src="https://agentmods.dev/badge/skills/dragoon0x/canon/canon-cards/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 canon-cards

Your own site · 80×15
<a href="https://agentmods.dev/skills/dragoon0x/canon/canon-cards"><img src="https://agentmods.dev/badge/skills/dragoon0x/canon/canon-cards.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,164 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.
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 $0.00083 $0.02164
Opus 5 $0.00042 $0.01082
Sonnet 5 $0.00017 $0.00433
Haiku 4.5 $0.00008 $0.00216

Measured 10d ago against content hash 3a631f87daf7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

canon-cards 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 10d 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.

source/skills/canon-cards/SKILL.md · 243 lines

How it starts

The opening of the file, as written. The whole thing — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CANON · Cards

Cards group related content into a single, visually distinct unit. Overused, they turn any page into a scrapbook.

When a card is appropriate

Use a card Don't use a card
Item has media + title + description + actions Item is a single line of text
Users scan a grid of similar items Items flow as prose or a list
Each item needs its own actions One shared action applies to many items
Content is self-contained Content connects narratively to siblings

If the "card" has no border, no shadow, and no background — it's just a layout block. Don't call it a card.

Card structure

<article class="card">
  <a href="/products/123" class="card-media">
    <img src="..." alt="" width="400" height="300">
  </a>
  <div class="card-body">
    <h3 class="card-title"><a href="/products/123">ThinkPad X1 Carbon</a></h3>
    <p class="card-desc">14" · 16GB RAM · 512GB</p>
    <div class="card-meta">$1,499</div>
  </div>
  <div class="card-actions">
    <button>Add to cart</button>
  </div>
</article>
  • <article> when the card represents a standalone piece of content.
  • Otherwise <div> or <li> (inside a grid).
  • Avoid wrapping the whole card in a single <a> — it makes interactive children inaccessible.

Padding

Card size Padding
Compact (128–200px tall) 12px
Default (200–320px) 16–20px
Large (320px+) 24px
Dense (dashboard stat card) 16px

Padding stays consistent across all sides. Don't lopside it unless there's a media bleed.

Media + content — the bleed rule

Cards with images usually bleed the image edge-to-edge, content gets padding. This reads as polished.

┌─────────────────────┐
│                     │  ← image bleeds
│      [image]        │
│                     │
├─────────────────────┤
│ 16px padding        │
│ Title               │  ← content padded
│ Description         │
│ $49                 │
│ 16px padding        │
└─────────────────────┘

Read the full file on GitHub · 243 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. 10d ago First seen · 243 lines · 83 tokens per session scan A 3a631f87daf7

Subscribe to this mod's changes

canon-cards is a skill published in the GitHub repository Dragoon0x/canon (5 stars, last pushed 4mo ago), licensed MIT. It adds 83 tokens to every session and 2,164 once invoked, about $0.0004 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 2026-08-31.

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