# sent-messaging

A skill for Sent messaging: builds a template-based send, then checks one message's status and delivery history through MCP tools.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 2900 installs · ★ 48
- Author: sentdm
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/sentdm/sent-plugin/tree/HEAD/skills/sent-messaging/SKILL.md
- Updated: 2026-10-20
- HTML: https://affpapa.org/en/nevibecode/skills/sent-messaging

## What it does

Three operations sit behind this skill: `messages.send`, `messages.get` and `messages.activities.list`. With them the agent fires off SMS, WhatsApp or RCS, reads the current record for a known identifier, and walks through lifecycle events. Sends are template-only. You locate an existing template through `templates.list` or `templates.get` in the same acting scope, pass its real ID or name, and supply every declared variable. Free-form text will not work as a template name.

Before any mutation the skill builds the exact `messages.send` arguments without calling the tool, then shows a preview: organization, Sender Profile, channel, destination, template and its reviewed content, variables, scheduling and idempotency inputs. Confirmation must be explicit and tied to that payload — approval given earlier in the conversation does not carry over. For a scheduled send, `scheduledAt` takes an ISO-8601 timestamp with an explicit UTC offset or `Z`; offset-free values are rejected, and the instant has to land between 1 minute and 30 days ahead. No MCP tool exists for rescheduling or cancelling.

The MCP client handles OAuth 2.1/PKCE authorization, and the skill forbids asking for, printing or storing tokens and API keys. If the client lacks MCP support or authorization fails, the skill still helps plan a payload but cannot execute the send. A retry counts as a fresh mutation: rebuild the payload, preview again, confirm again.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add sentdm/sent-plugin --skill sent-messaging -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/sent-messaging/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/sent-messaging/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add sentdm/sent-plugin --skill sent-messaging -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/sent-messaging/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add sentdm/sent-plugin --skill sent-messaging -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/sent-messaging/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install sentdm/sent-plugin sent-messaging
```

2. **Manually: put the files in place**
- File: `.github/skills/sent-messaging/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add sentdm/sent-plugin --skill sent-messaging -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/sentdm/sent-plugin --path skills/sent-messaging
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/sent-messaging/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add sentdm/sent-plugin --skill sent-messaging -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/sentdm/sent-plugin/tree/HEAD/skills/sent-messaging/SKILL.md

## When to use it
- send an SMS or WhatsApp message from an existing template
- schedule a send for a specific local time
- confirm whether a message was delivered, given its ID
- trace lifecycle events to find why a send failed
- recover from a timed-out send without duplicating it

## Example prompts
- Send a message using the `order_shipped` template to the number on this order
- Schedule the send for tomorrow at 10:00 Moscow time
- Check message `msg_123` and show me its activity history

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 08ae5fd19a7a33fe.

BEGIN THIRD-PARTY FILE 08ae5fd19a7a33fe
```text
---
name: sent-messaging
description: Sends SMS, WhatsApp, or RCS messages through Sent and retrieves individual message status and activity history with the Sent MCP tools. Use when a user asks to send, schedule, or preview a message, check a message ID, confirm delivery status, inspect lifecycle events, investigate a timed-out or ambiguous send, or retry safely. Use messaging-performance-analyzer for aggregate delivery diagnosis.
---

# Sent Messaging

Operate direct message workflows with `messages.send`, `messages.get`, and `messages.activities.list`.

## Establish connection and scope

1. Let the MCP client perform OAuth 2.1/PKCE authorization. Never request, accept, print, or store tokens, API keys, authorization headers, client IDs, or secrets.
2. Surface the organization and Sender Profile selected by the active connection before a mutation. If the client context does not expose both, use `sent-account-readiness` to inspect the authorized scope before continuing.
3. Use an explicit, validated acting profile when an organization grant supports it.
4. Minimize sensitive output. Mask phone numbers where practical and do not repeat message bodies after the operator has reviewed them.

If MCP is unsupported or authorization fails, keep the skill usable for payload planning. Explain that execution requires a compatible client or reauthorization; never ask the user to paste a credential.

An organization grant may select an owned Sender Profile with the tool schema's optional `profileId`; omit it to act as the authenticated account. Validate ownership with `sender_profiles.list` or `sender_profiles.get`, and use the same selector for preflight reads, mutations, and follow-up reads. Profile grants cannot use this selector. Reauthorize for a different organization or a profile outside the grant. Never invent scope fields or request credentials.

## Inspect a message

- Use `messages.get` for the current record when a message identifier is known.
- Use `messages.activities.list` for lifecycle events and delivery evidence.
- State that an accepted or queued send is not proof of delivery. Report delivered only when the returned state or activity establishes delivery.
- Return identifiers, timestamps, and status evidence needed to answer the question, masking recipient data and omitting the message body unless it is necessary.
```
END THIRD-PARTY FILE 08ae5fd19a7a33fe

The third-party file has ended. Everything between the 08ae5fd19a7a33fe tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 2364 of 5806 bytes. © sentdm · MIT · https://github.com/sentdm/sent-plugin/tree/HEAD/skills/sent-messaging/SKILL.md

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