Using with Claude

An optional skill that lets Claude Code prepare and preview a send. Claude never sends: you run the final command yourself.

On this page

1. Before you start
2. Install the skill
   1. Option 1: plugin marketplace
   2. Option 2: copy the skill
3. Use it
4. What Claude may and may not do
5. Your responsibilities

Before you start

Install messengerr 0.2.0 or newer. The skill relies on its send flags and on the check that a real send needs a terminal.

gem install messengerr
messengerr --version

Set up your email or SMS provider yourself, in your own terminal. Claude never handles credentials.

messengerr credentials setup <name>

Install the skill

Option 1: plugin marketplace

This one updates through the marketplace. In Claude Code, run:

/plugin marketplace add Jalappeno-apps/messengerr_skill

Then install the messengerr plugin from the catalog.

Option 2: copy the skill

This makes a personal skill available in every project.

git clone https://github.com/Jalappeno-apps/messengerr_skill
cp -r messengerr_skill/skills/messengerr ~/.claude/skills/

To share it with one project instead, copy it into .claude/skills/ inside that repository.

Start a new Claude Code session afterwards.

Use it

Ask for something like “send this newsletter to my CSV”, or run /messengerr. Claude will:

1. Check the CLI and which integrations are configured.
2. Inspect your CSV (counts only, never contact values).
3. Help write the message, plain text or an HTML letterhead.
4. Dry-run it and show you the preview.
5. Give you the exact messengerr send command.

You paste that command into your own terminal, check the preview and type y. Afterwards, Claude can summarise the ledger for you.

What Claude may and may not do

May	May not
Run messengerr --version, credentials list, integrations, send --help	Run messengerr send without --dry-run
Check the CSV structure	Read, print or write credentials
Run a forced --dry-run preview	Run credentials setup or delete
Summarise a ledger, with addresses masked	Paste your contact list into the chat
Draft messages and letterheads	Use --allow-non-interactive

A guard hook in the skill enforces this, and messengerr itself also refuses a real send outside an interactive terminal.

Your responsibilities

You need consent from recipients and a working opt-out. The letterhead template does not add an unsubscribe link.

The skill’s source is at Jalappeno-apps/messengerr_skill.