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 tushaarmehtaa/tushar-skills --skill email-with-resendgit clone --depth 1 https://github.com/tushaarmehtaa/tushar-skillsWrote 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/tushaarmehtaa/tushar-skills/email-with-resend)<a href="https://agentmods.dev/skills/tushaarmehtaa/tushar-skills/email-with-resend"><img src="https://agentmods.dev/badge/skills/tushaarmehtaa/tushar-skills/email-with-resend/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/tushaarmehtaa/tushar-skills/email-with-resend"><img src="https://agentmods.dev/badge/skills/tushaarmehtaa/tushar-skills/email-with-resend.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 | $0.00042 | $0.00611 |
| Opus 5 | $0.00021 | $0.00305 |
| Sonnet 5 | $0.00008 | $0.00122 |
| Haiku 4.5 | $0.00004 | $0.00061 |
Grade A, and why
email-with-resend 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 12d 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 — 30 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Email with Resend
Implement email as a reliable, permission-aware subsystem. This is not a cold-outreach workflow.
Workflow
- Inspect framework/runtime, installed Resend SDK version, queues/jobs, database and user fields, auth/admin roles, existing templates, email events, consent/preferences, suppression data, webhooks, and verified-domain configuration.
- Classify each requested message as transactional, security, lifecycle, or marketing. Do not scaffold re-engagement or campaigns by default. Ask about sender identity, jurisdiction/consent, and preference policy only when not established by the product.
- Read the Resend guide for current send/batch/webhook patterns, suppression handling, unsubscribe design, and copy guidance relevant to the selected class.
- Centralize provider calls. Detect the installed SDK API, handle both returned
errorvalues and thrown transport/runtime errors, use idempotency keys for event-triggered sends, and return a typed result to the caller. - Escape untrusted template values or use React/provider templates. Generate both HTML and useful text. Keep sender/reply-to configuration server-side and use a verified sending subdomain where appropriate.
- Do not block or silently abandon the primary transaction. Use a durable outbox/queue, or a runtime-supported post-response primitive with observability when loss is acceptable. Unawaited promises are not reliable in serverless runtimes.
- For campaigns, use contacts/audiences or a durable campaign job rather than a long request loop. Enforce consent, preferences, suppression, per-recipient idempotency, rate limits, cancellation, and an audit record. Require role-based admin authorization and confirmation of segment/count before send.
- Verify Resend webhook signatures over the raw body, deduplicate events, and process bounces/complaints/delivery failures into a suppression model. Never trust an unsigned event.
- Provide one-click unsubscribe and preference handling where required. Do not expose raw email addresses in URLs when an opaque signed identifier can be used. Keep transactional/security opt-outs separate from marketing preferences.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 30 lines · 42 tokens per session scan A fe4f163c5c45
email-with-resend is a skill published in the GitHub repository tushaarmehtaa/tushar-skills (11 stars, last pushed 2d ago), licensed MIT. It adds 42 tokens to every session and 611 once invoked, about $0.0002 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.
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