Novu Design Workflow
novuhq/novu
Design notification workflows the Novu way — choose channels, set severity, decide when a workflow is critical, configure digests, and route based on subscriber state.
Set up and send emails via a user-provided Resend account (BYO email provider)
Install Resend Setup
$ npx skills add vellum-ai/vellum-assistant --skill resend-setup -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vellum-ai/vellum-assistant resend-setup --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/resend-setup .claude/skills/resend-setup && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "resend-setup" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setup into .claude/skills/resend-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "resend-setup", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setupType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add vellum-ai/vellum-assistant --skill resend-setup -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vellum-ai/vellum-assistant resend-setup --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/resend-setup .agents/skills/resend-setup && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "resend-setup" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setup into .agents/skills/resend-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "resend-setup", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add vellum-ai/vellum-assistant --skill resend-setup -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vellum-ai/vellum-assistant resend-setup --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/resend-setup .cursor/skills/resend-setup && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "resend-setup" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setup into .cursor/skills/resend-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "resend-setup", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/vellum-ai/vellum-assistant.git --path skills/resend-setup--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add vellum-ai/vellum-assistant --skill resend-setup -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vellum-ai/vellum-assistant resend-setup --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/resend-setup .gemini/skills/resend-setup && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "resend-setup" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setup into .gemini/skills/resend-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "resend-setup", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install vellum-ai/vellum-assistant resend-setupInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add vellum-ai/vellum-assistant --skill resend-setup -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/resend-setup .github/skills/resend-setup && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "resend-setup" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setup into .github/skills/resend-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "resend-setup", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add vellum-ai/vellum-assistant --skill resend-setup -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install vellum-ai/vellum-assistant resend-setup --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vellum-ai/vellum-assistant.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/resend-setup .opencode/skills/resend-setup && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "resend-setup" agent skill from https://github.com/vellum-ai/vellum-assistant/tree/main/skills/resend-setup into .opencode/skills/resend-setup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "resend-setup", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
resend-setup- GitHub stars
- 1.4k
- Token cost
- ~1.5k tokens
- SKILL.md length
- 597 words
- Files
- 4 (incl. scripts)
- Skills in repo
- 108
- Repo updated
- First seen
- Licence
- MIT
At a glance
Set up and send emails via a user-provided Resend account (BYO email provider)
- Works in 6 steps: Check Existing Configuration → Store the API Key → Detect the Domain → …
- Tasks that involve Webhooks
- SKILL.md covers Overview, Setup, Sending Email and Important Notes
- Runs TypeScript scripts from its folder; calls bun and curl; reaches api.resend.com
What it does
Resend Setup is an agent skill from vellum-ai/vellum-assistant. Set up and send emails via a user-provided Resend account (BYO email provider)
Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including scripts (for example `scripts/check-config.ts`, `scripts/setup-webhook.ts` and `scripts/store-api-key.ts`). Compatibility notes: Designed for Vellum personal assistants
It sits in Backend & APIs, covering Webhooks. The repository describes itself as: An AI Assistant that’s easy to setup, does your work 24/7, knows your preferences and gets better over time. The licence is MIT.
When your agent uses it
- Tasks that involve Webhooks
Example prompts
- “/resend-setup”
Requirements
- Node.js
- Compatibility (from SKILL.md): Designed for Vellum personal assistants
Workflow steps
6 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 844117a. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 3 files in scripts/ (TypeScript), which the agent can run.
Shell commands in SKILL.md call:
buncurl
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
api.resend.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
Designed for Vellum personal assistants
From compatibility in the SKILL.md frontmatter.
Context cost
Resend Setup loads about 1.5k tokens when it runs. Until then it costs about 23 tokens; SKILL.md has 597 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from vellum-ai/vellum-assistant at commit 844117a, republished under its MIT licence (© vellum-ai). 597 words, ~1,525 tokens.
Download SKILL.mdSave it as
.claude/skills/resend-setup/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- resend-setup
- description
- Set up and send emails via a user-provided Resend account (BYO email provider)
- compatibility
- Designed for Vellum personal assistants
- metadata.emoji
- 📤
Overview
Send emails through the user's own Resend account. The user provides their Resend API key and you send via their domain.
Setup
Step 0: Check Existing Configuration
Before starting, check whether Resend is already configured:
bun skills/resend-setup/scripts/check-config.tsThe script outputs JSON: { "configured": boolean, "hasApiKey": boolean, "hasWebhookSecret": boolean, "details": string }.
- If
configuredistrue— Resend is already set up. Offer to verify the connection or reconfigure. - If
configuredisfalse— continue to Step 1.
Step 1: Store the API Key
Run the store script to securely collect the API key:
bun skills/resend-setup/scripts/store-api-key.tsThe script opens a secure credential prompt, stores the key with the correct injection templates, and exits. If it exits 0, the key is stored. Exit code 130 means the user cancelled the prompt — nothing was stored; that's a valid choice, not an error, so ask whether they'd like to try again rather than treating it as a failure. Any other non-zero exit is a real failure. Never ask for the key in chat.
Step 2: Detect the Domain
After storing the API key, automatically detect the user's domain — don't ask them for it. Call the Resend Domains API:
curl -s https://api.resend.com/domains \
-H "Content-Type: application/json"Run this with network_mode: "proxied" and the resend credential so the Authorization header is injected automatically. The response contains a data array of domain objects with name and status fields. Pick the first domain with "status": "verified" (or the only domain if there's just one). If no verified domains are found, tell the user they need to verify a domain in their Resend dashboard first.
Use hi@<domain> as the default sender address. Remember the domain for future sends.
Step 3: Verify the Connection
Send a test request to confirm the API key works:
curl -s https://api.resend.com/domains \
-H "Content-Type: application/json"Run with network_mode: "proxied" and the resend credential. A successful response (HTTP 200) with domain data confirms the connection.
Step 4: Webhook Setup (for receiving email)
If the user also wants to receive emails via Resend, run the webhook setup script:
bun skills/resend-setup/scripts/setup-webhook.ts --domain "<verified domain>"This script:
- Registers a callback URL via the webhooks system
- Creates the webhook in Resend via their API
- Automatically stores the returned signing secret in the credential vault
If the script fails because no public base URL is configured (self-hosted only), load the public-ingress skill to walk the user through setting one up, then retry.
Show full SKILL.md (218 more words)Show less
Step 5: Report Success
Summarize with the completed checklist:
"Setup complete!
✅ API key configured
✅ Domain detected: <domain>
✅ Connection verified
{webhook_line}
Default sender: hi@<domain>"
For {webhook_line}:
- If webhook was set up:
✅ Webhook configured for inbound email - If skipped:
⬜ Webhook — run setup again to enable inbound email
Sending Email
Use bash with curl to call the Resend API. The credential proxy injects the Authorization: Bearer header automatically when using network_mode: "proxied" with the resend credential.
curl -X POST https://api.resend.com/emails \
-H "Content-Type: application/json" \
-d '{
"from": "Name <sender@example.com>",
"to": ["recipient@example.com"],
"subject": "Hello",
"text": "Plain text body",
"html": "<p>HTML body</p>"
}'API Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
from | string | ✅ | Sender address ("Name <email>" format) |
to | string | string[] | ✅ | Recipient(s), max 50 |
subject | string | ✅ | Email subject |
text | string | Plain text body | |
html | string | HTML body | |
cc | string | string[] | CC recipients | |
bcc | string | string[] | BCC recipients | |
reply_to | string | string[] | Reply-to address | |
headers | object | Custom headers (e.g. In-Reply-To, References for threading) |
Threading (replies)
To reply in a thread, include In-Reply-To and References headers:
{
"from": "bot@example.com",
"to": ["user@example.com"],
"subject": "Re: Original subject",
"text": "Reply body",
"headers": {
"In-Reply-To": "<original-message-id>",
"References": "<original-message-id>"
}
}Response
Success returns { "id": "email-id" } with HTTP 200.
Errors return { "message": "error description" } with 4xx/5xx status.
Important Notes
- The
fromaddress must be from a domain verified in the user's Resend account. - Default sender address is
hi@<domain>— use this unless the user specifies otherwise. - Always confirm with the user before sending — never send without explicit permission.
- Use
textfor plain text,htmlfor rich formatting. Provide both when possible. - Rate limits depend on the user's Resend plan.
© vellum-ai, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 3 other files (scripts) in skills/resend-setup of vellum-ai/vellum-assistant.
- SKILL.md
- scripts/check-config.ts
- scripts/setup-webhook.ts
- scripts/store-api-key.ts
Open the folder on GitHubat commit 844117a
Compare with similar skills
Resend Setup next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Resend Setup this skillvellum-ai/vellum-assistant | 1.4k | — | ~1.5k | Automated safety check: Pass | MIT | |
| Novu Design Workflownovuhq/novu | 40k | — | ~2.6k | Automated safety check: Pass | Custom licence | |
| Golivemikehasa/golive-skill | 1.2k | — | ~13k | Automated safety check: Notes | MIT | |
| Stripe Appsfossasia/eventyay | 1.7k | 1 repos | ~3.6k | Automated safety check: Pass | Apache-2.0 | |
| Dingtalk Messageagentscope-ai/ReMe | 3.6k | — | ~1.6k | Automated safety check: Pass | Apache-2.0 | |
| PR Review Provideryansongda/pay | 5.4k | — | ~2.4k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Resend Setup
What does Resend Setup do?
Set up and send emails via a user-provided Resend account (BYO email provider). Resend Setup is an agent skill from vellum-ai/vellum-assistant.
When should I use Resend Setup?
Resend Setup fits situations like: tasks that involve Webhooks.
How do I install Resend Setup in Claude Code?
Run `npx skills add vellum-ai/vellum-assistant --skill resend-setup -a claude-code`. Or copy the skill folder (skills/resend-setup in vellum-ai/vellum-assistant) into .claude/skills/resend-setup in your project. Claude Code loads it when a task matches its description.
How do I install Resend Setup in Codex?
Run `npx skills add vellum-ai/vellum-assistant --skill resend-setup -a codex`. Or copy the skill folder (skills/resend-setup in vellum-ai/vellum-assistant) into .agents/skills/resend-setup in your project. Codex loads it when a task matches its description.
Can I use Resend Setup in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add vellum-ai/vellum-assistant --skill resend-setup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/resend-setup, .gemini/skills/resend-setup, .github/skills/resend-setup and .opencode/skills/resend-setup in your project.
What does Resend Setup need to run?
Going by SKILL.md and its folder, Resend Setup needs TypeScript for the scripts in its folder and the command-line tools its instructions call (bun and curl). Our summary lists: Node.js. Compatibility (from SKILL.md): Designed for Vellum personal assistants.
Does Resend Setup access the network?
SKILL.md names 1 domain. In commands or code: api.resend.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Resend Setup safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Resend Setup use?
Resend Setup is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Resend Setup use?
About 1.5k tokens (SKILL.md is roughly 6.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Resend Setup?
Skills that share tags, products or a category with Resend Setup: Novu Design Workflow (novuhq/novu, 40k stars), Golive (mikehasa/golive-skill, 1.2k stars), Stripe Apps (fossasia/eventyay, 1.7k stars) and Dingtalk Message (agentscope-ai/ReMe, 3.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Resend Setup?
vellum-ai (a GitHub organization) maintains it in vellum-ai/vellum-assistant, which has 1,400 GitHub stars. The repository holds 108 skills in this directory. The repository was last updated on October 9, 2026.
Source: vellum-ai/vellum-assistant on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.