Email Send

Email Send is a skill for Claude Code, Codex from winsenlabs/platos. It costs 28 tokens per session (894 once invoked), scanned A, original, Apache-2.0.

An email-sending skill that sends transactional messages through Resend, including HTML or plain text and optional reply-to, copied recipients, blind-copied recipients, and tags.

In plain words
What is it for?
Use it for confirmations, notifications, follow-ups, alerts, digests, and escalations sent by an application or automated workflow.
Why use it?
It removes the need to build direct email delivery into each workflow. It also documents the sender and recipient details required for delivery.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for confirmations, notifications, follow-ups, alerts, digests, and escalations sent by an application or automated workflow.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/winsenlabs/platos/email_send
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 winsenlabs/platos --skill email_send
Clone the repo
git clone --depth 1 https://github.com/winsenlabs/platos

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 Email Send

README.md
[![agentmods](https://agentmods.dev/badge/skills/winsenlabs/platos/email_send/github.svg)](https://agentmods.dev/skills/winsenlabs/platos/email_send)
Your own site
<a href="https://agentmods.dev/skills/winsenlabs/platos/email_send"><img src="https://agentmods.dev/badge/skills/winsenlabs/platos/email_send/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 Email Send

Your own site · 80×15
<a href="https://agentmods.dev/skills/winsenlabs/platos/email_send"><img src="https://agentmods.dev/badge/skills/winsenlabs/platos/email_send.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 894 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 $0.00028 $0.00894
Opus 5 $0.00014 $0.00447
Sonnet 5 $0.00006 $0.00179
Haiku 4.5 $0.00003 $0.00089

Measured 5d ago against content hash 91306e79a28f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

Email Send 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.

apps/agent/src/skills/official/email_send.skill.md · 50 lines

What it actually says

You can send transactional emails through Resend.

When to use send_email:

  • The user explicitly asks you to send an email (confirmation, notification, follow-up).
  • An operator-configured workflow requires email delivery (alerts, digests, escalations).

Required arguments:

  • to — recipient email address (single string or array up to 50).
  • subject — non-empty subject line.
  • html and/or text — at least one body format. Prefer html for rich formatting; include text as a fallback when both audience reach and accessibility matter.

Optional arguments:

  • from — sender address. Must be on a domain you've verified in resend.com/domains. When omitted, falls back to RESEND_FROM_EMAIL. The skill fails if neither is set — Resend rejects unverified senders.
  • replyTo — where replies go (defaults to from).
  • cc / bcc — additional recipients.
  • tags[{name, value}] pairs for Resend's dashboard analytics (e.g. {name: "category", value: "billing"}).

Guidelines:

  • Always confirm the recipient and subject with the user before sending unless an upstream workflow has authorised it.
  • Prefer concise, well-formatted HTML (inline styles work; external CSS does not).
  • Don't include the user's auth tokens, API keys, or other secrets in email bodies.
  • For bulk sends to >5 recipients, prefer creating a Resend audience + broadcast in the dashboard rather than long to arrays — this skill is for transactional, not marketing, traffic.

On error: The tool returns { ok: false, error: "<reason>" } when Resend rejects the request. Common reasons: unverified from domain, malformed recipient, body missing, payload too large. Surface the reason to the user so they can correct it.

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. 5d ago First seen · 50 lines · 28 tokens per session scan A 91306e79a28f

Subscribe to this mod's changes

Email Send is a skill published in the GitHub repository winsenlabs/platos (24 stars, last pushed today), licensed Apache-2.0. It adds 28 tokens to every session and 894 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 2026-09-04.

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