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c-messaging — Claude Code skill: what it does, how to install

Sends and reads iMessage, SMS, and WhatsApp chats directly from your agent session. Useful when you need to inspect unread threads or dispatch updates.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓
npx skills add daxaur/openpaw --skill c-messaging -a claude-code
Open on GitHub

What c-messaging does

This skill connects the assistant to two local command-line tools: imsg for iMessage and SMS, and wacli for WhatsApp. Through them, the agent can check unread messages, fetch recent conversation history, and dispatch text to individual contacts or group chats.

Because imsg relies on macOS and an active iMessage account, it will not function on Linux or Windows setups. For WhatsApp, you run wacli auth once to scan the setup QR code. Both utilities run locally on your system, so no external cloud API keys are required.

What it helps with

  • check unread messages across iMessage and WhatsApp
  • send direct messages using phone numbers or contact names
  • dispatch updates into existing group chats
  • review recent chat logs before sending a follow-up

Example prompts for the agent

  • Check unread messages in WhatsApp with wacli unread
  • Send "Meeting starts in 10 minutes" to +14155551234 using imsg
  • List the last 10 conversations from iMessage with imsg list --limit 10

How to install c-messaging

1Skills CLI (Vercel)

npx skills add daxaur/openpaw --skill c-messaging -a claude-code

2Manually: put the files in place

~/.claude/skills/c-messaging/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/c-messaging/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about c-messaging

How to install c-messaging in Claude Code?

Run npx skills add daxaur/openpaw --skill c-messaging -a claude-code. Alternatively, you can add the file directly at ~/.claude/skills/c-messaging/SKILL.md.

What does c-messaging do?

It enables the assistant to interact with iMessage, SMS, and WhatsApp using local CLI tools imsg and wacli.

What requirements are needed to run c-messaging?

You need macOS with a configured iMessage account for imsg, and a linked WhatsApp account authorized via wacli auth for WhatsApp messaging.

Source text

SKILL.md · MIT
---
name: c-messaging
description: Send and read messages via imsg (iMessage) and wacli (WhatsApp). Supports sending to individuals or groups, reading recent conversations, and checking unread messages across both platforms.
tags: [messaging, imessage, whatsapp, imsg, wacli, sms]
---

This skill manages messaging via `imsg` (iMessage/SMS) and `wacli` (WhatsApp). Check availability with `which imsg wacli`.

## iMessage & SMS — `imsg`

```bash
imsg send "Phone or Email" "Message text"  # Send a message
imsg send "+14155551234" "Hello!"
imsg send "[email protected]" "Hey there"
imsg list                                   # List recent conversations
imsg list --limit 10                        # Last 10 conversations
imsg read "+14155551234"                    # Read conversation with contact
imsg read "+14155551234" --limit 20         # Read last 20 messages
imsg unread                                 # Show unread messages
imsg group send "Group Name" "Message"      # Send to a group chat
imsg group list                             # List group chats
imsg contacts                               # List contacts
```

## WhatsApp — `wacli`

```bash
wacli send "+14155551234" "Message text"    # Send a message
wacli send "Contact Name" "Hello!"          # Send by name (if in contacts)
wacli list                                  # List recent chats
wacli read "+14155551234"                   # Read conversation
wacli read "+14155551234" --limit 20
wacli unread                                # Show unread messages
wacli group list                            # List WhatsApp groups
wacli group send "Group Name" "Message"
wacli status "Your status text"            # Set WhatsApp status
```

## Usage Guidelines

- Use `imsg` for iMessage/SMS to Apple devices or phone numbers.
- Use `wacli` for WhatsApp contacts.
- Phone numbers should include country code (e.g., +1 for US).
- Check `imsg unread` or `wacli unread` before sending follow-ups.
- If a contact name is ambiguous, prefer using the phone number directly.

## Notes

- `imsg` requires macOS and an active iMessage account.
- `wacli` requires WhatsApp to be linked — run `wacli auth` to scan QR code on first use.
- Both tools operate locally; no cloud API credentials required after initial auth.

© daxaur · MIT · daxaur/openpaw

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