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/everything-design-taste --skill design-for-emailgit clone --depth 1 https://github.com/Dragoon0x/everything-design-tasteWrote 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/everything-design-taste/design-for-email)<a href="https://agentmods.dev/skills/dragoon0x/everything-design-taste/design-for-email"><img src="https://agentmods.dev/badge/skills/dragoon0x/everything-design-taste/design-for-email/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/everything-design-taste/design-for-email"><img src="https://agentmods.dev/badge/skills/dragoon0x/everything-design-taste/design-for-email.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 | $0.00018 | $0.00312 |
| Opus 5 | $0.00009 | $0.00156 |
| Sonnet 5 | $0.00004 | $0.00062 |
| Haiku 4.5 | $0.00002 | $0.00031 |
Grade A, and why
design-for-email 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 8d 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.
What it actually says
Design for Email
Technical Constraints
- Use tables for layout (flexbox/grid not supported)
- Inline CSS (many clients strip
<style>tags) - Max width: 600px
- No JavaScript
- No video (use GIF or static image with play button)
- Background images: limited support (use
bgcolorfallback)
Client-Specific Issues
| Client | Major Issue |
|---|---|
| Outlook (Windows) | Uses Word rendering engine. Tables only. |
| Gmail | Strips <style> in non-Google-account views |
| Apple Mail | Most capable, supports most CSS |
| Yahoo | Strips some CSS, adds its own |
Design Rules
- Single column layout (reliable everywhere)
- System fonts + web-safe fallbacks
- Button: use a padded table cell with background color (not CSS button)
- Images: always set width, provide alt text
- Dark mode: test appearance, some clients auto-invert
- Preview text: first 80-100 characters visible in inbox
Testing
- Test in: Gmail (web), Outlook (desktop), Apple Mail, mobile Gmail, mobile Mail
- Tools: Litmus, Email on Acid
- Send test emails to yourself on multiple devices
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.
- 8d ago First seen · 37 lines · 18 tokens per session scan A f2292e3347da
design-for-email is a skill published in the GitHub repository Dragoon0x/everything-design-taste (11 stars, last pushed 5mo ago), licensed MIT. It adds 18 tokens to every session and 312 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 2026-09-03.
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