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.
npx skills add Dragoon0x/canon --skill canon-cardsgit clone --depth 1 https://github.com/Dragoon0x/canonWrote 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.
[](https://agentmods.dev/skills/dragoon0x/canon/canon-cards)<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.
<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>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 | $0.00083 | $0.02164 |
| Opus 5 | $0.00042 | $0.01082 |
| Sonnet 5 | $0.00017 | $0.00433 |
| Haiku 4.5 | $0.00008 | $0.00216 |
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.
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 │
└─────────────────────┘
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.
- 10d ago First seen · 243 lines · 83 tokens per session scan A 3a631f87daf7
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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