Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/kensaurus/cursor-kenjinpx agentmods add skills/kensaurus/cursor-kenji/design-emailWrote 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/kensaurus/cursor-kenji/design-email)<a href="https://agentmods.dev/skills/kensaurus/cursor-kenji/design-email"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/design-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/kensaurus/cursor-kenji/design-email"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/design-email.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, 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 MCP Rug Pull · line 33 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 324 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 329 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00071 | $0.03142 |
| Opus 5 | $0.00036 | $0.01571 |
| Sonnet 5 | $0.00014 | $0.00628 |
| Haiku 4.5 | $0.00007 | $0.00314 |
Grade A, and why
design-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 5d 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 — 371 lines — stays where its author put it; the contents beside it link to each section on GitHub.
design-email — Email Templates That Actually Get Read
Degree of freedom: MIXED. Copy and layout judgment [HIGH freedom];
stack detect, markup, send, and preview [LOW freedom — run exactly].
Email is the one channel users check before they check your app. A
well-crafted transactional email — clear, warm, fast-loading, and readable on
any device — builds trust. A corporate, jargon-heavy, broken email erodes it.
This skill handles design and copy. Inbox placement / SPF DKIM DMARC is enhance-email-deliverability.
How to reason
- Detect — React Email vs MJML vs none
- Audit — copy voice, subject, one action; client-safe layout
- Write — specific subject, human "you", plain-text twin
- Preview — 375px + dark mode; hand DNS off
Worked example
Detect:
@react-email/componentsalready inpackage.json;emails/has a receipt only. Audit: password-reset subject is "Account notification"; two CTAs; no preview text. Write: subject "Reset your App password"; one "Reset my password" button; expiry in the first sentence. Preview:npx email devat 375px; tap target ≥44px; DNS/spam →enhance-email-deliverability.
Self-critique before reporting
- One action — exactly one primary CTA; subject is specific and honest
- Client-safe — 600px single column, inline styles, alt text, dark fallback
- Human copy — "you"/"we"; no jargon or ALL-CAPS subject
- Right owner — SPF / DKIM / DMARC / bounces / List-Unsubscribe →
enhance-email-deliverability
Phase 0: Detect the stack [LOW freedom — run exactly]
package.json → @react-email/*, mjml, nodemailer, @sendgrid/mail,
resend, @aws-sdk/client-ses, postmark
emails/ → existing React Email templates
src/emails/ → email template directory
.env.* → RESEND_API_KEY, SENDGRID_API_KEY, etc. (reference by name only)
| Detected framework | Approach |
|---|---|
React Email (@react-email/components) |
JSX components, preview server, multi-client export |
| MJML | XML-like syntax, battle-tested cross-client output |
| None | Implement React Email (current best practice) |
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.
- 5d ago First seen · 371 lines · 71 tokens per session scan A dd9f354bb17f
design-email is a skill published in the GitHub repository kensaurus/cursor-kenji (9 stars, last pushed 10d ago), licensed MIT. It adds 71 tokens to every session and 3,142 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 2026-09-03.
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