resend-build

resend-build is a skill for Claude Code, Codex from vercel-labs/marketing-team-eve-template. It costs 32 tokens per session (1,086 once invoked), scanned A, original, MIT.

A guide to building, editing, sending, and checking email broadcasts and reusable templates in Resend, an email-sending service.

In plain words
What is it for?
Use it to create broadcasts for audience segments, build templates with variables, compose email content, inspect previous sends, and prepare an email for approval and sending.
Why use it?
It helps avoid quiet setup mistakes, such as using an unverified sending domain, choosing the wrong audience, or sending before the email is ready and approved.

Skill for Claude CodeCodex ✓ vendor

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

Good fit Use it to create broadcasts for audience segments, build templates with variables, compose email content, inspect previous sends, and prepare an email for approval and sending.

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Install with agentmods
npx agentmods add skills/vercel-labs/marketing-team-eve-template/resend-build
About the project

vercel-labs/marketing-team-eve-template is a deployable team of AI marketing agents led by a coordinating agent that delegates launches, writing, and conversion work to specialists. Teams use it through Slack or a terminal to create blog drafts, social posts, and email campaigns in Notion, Typefully, and Resend, with approval required for irreversible actions. The catalogue skills and instructions define workflows for using this marketing team.

vercel-labs/marketing-team-eve-template · 436 stars · on GitHub · vercel.com

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 vercel-labs/marketing-team-eve-template --skill resend-build
Clone the repo
git clone --depth 1 https://github.com/vercel-labs/marketing-team-eve-template

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 resend-build

README.md
[![agentmods](https://agentmods.dev/badge/skills/vercel-labs/marketing-team-eve-template/resend-build/github.svg)](https://agentmods.dev/skills/vercel-labs/marketing-team-eve-template/resend-build)
Your own site
<a href="https://agentmods.dev/skills/vercel-labs/marketing-team-eve-template/resend-build"><img src="https://agentmods.dev/badge/skills/vercel-labs/marketing-team-eve-template/resend-build/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 resend-build

Your own site · 80×15
<a href="https://agentmods.dev/skills/vercel-labs/marketing-team-eve-template/resend-build"><img src="https://agentmods.dev/badge/skills/vercel-labs/marketing-team-eve-template/resend-build.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,086 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00032 $0.01086
Opus 5 $0.00016 $0.00543
Sonnet 5 $0.00006 $0.00217
Haiku 4.5 $0.00003 $0.00109

Measured 13d ago against content hash 602f2acc2c81, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

resend-build 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 13d 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.

agent/subagents/email/skills/resend-build/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Building in Resend

The tools are discoverable but the order matters, and several of them fail in ways that are quiet rather than loud. Read this before the first call, not after a call goes wrong.

Resend's tools are not preloaded. Find them with connection_search, then call them by their qualified name. Don't guess at a tool name or its arguments.

The build order

For a broadcast, which is one email to a segment:

  1. list-domains and pick a verified one for the from address.
  2. list-segments and pick the target. A broadcast requires a segment: there is no send-to-everyone option. If nothing covers the intended audience, say so and agree a segment with the user before creating one.
  3. create-broadcast with the name, segment, subject, and the plain text version. This does not send.
  4. get-tiptap-json-content with include_schema: true, then compose-broadcast to set the body.
  5. Show the user what you built: subject, preview text, from, segment and its size, and the send time.
  6. send-broadcast, which pauses for approval.

For a template, which is a reusable email with variables:

  1. create-template. It is created as a draft.
  2. get-tiptap-json-content with include_schema: true, then compose-template.
  3. publish-template. A template cannot be used for sending until it is published, and re-publishing is how an edit goes live.

The traps

Always read before you compose. Call get-tiptap-json-content before compose-broadcast or compose-template, even when you are certain the body is empty. Someone may have edited it in the dashboard, and composing without reading overwrites their work.

Two content modes, and switching loses work. Content set with compose-* is editable in the Resend visual editor; content set with update-broadcast's html and text fields is not. Moving between the two modes is lossy. Prefer compose-* so the user can refine it themselves, and if raw HTML is genuinely wanted, ask before switching an existing body over.

Read the full file on GitHub · 57 lines

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. 13d ago First seen · 57 lines · 32 tokens per session scan A 602f2acc2c81

Subscribe to this mod's changes

resend-build is a skill published in the GitHub repository vercel-labs/marketing-team-eve-template (436 stars, last pushed 23d ago), licensed MIT. It adds 32 tokens to every session and 1,086 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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