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imessage skill

by kevinnft·kevinnft/ai-agent-skills·14 stars·MIT

Send and receive iMessages/SMS via the imsg CLI on macOS.

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Install the imessage skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description. 

git clone --depth 1 https://github.com/kevinnft/ai-agent-skills.git /tmp/ai-agent-skills
mkdir -p ~/.claude/skills
cp -r /tmp/ai-agent-skills/skills/apple/imessage ~/.claude/skills/imessage
available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

iMessage

Use imsg to read and send iMessage/SMS via macOS Messages.app.

Prerequisites

  • macOS with Messages.app signed in
  • Install: brew install steipete/tap/imsg
  • Grant Full Disk Access for terminal (System Settings → Privacy → Full Disk Access)
  • Grant Automation permission for Messages.app when prompted

When to Use

  • User asks to send an iMessage or text message
  • Reading iMessage conversation history
  • Checking recent Messages.app chats
  • Sending to phone numbers or Apple IDs

When NOT to Use

  • Telegram/Discord/Slack/WhatsApp messages → use the appropriate gateway channel
  • Group chat management (adding/removing members) → not supported
  • Bulk/mass messaging → always confirm with user first

Quick Reference

List Chats

imsg chats --limit 10 --json

View History

# By chat ID
imsg history --chat-id 1 --limit 20 --json

# With attachments info
imsg history --chat-id 1 --limit 20 --attachments --json

Send Messages

# Text only
imsg send --to "+14155551212" --text "Hello!"

# With attachment
imsg send --to "+14155551212" --text "Check this out" --file /path/to/image.jpg

# Force iMessage or SMS
imsg send --to "+14155551212" --text "Hi" --service imessage
imsg send --to "+14155551212" --text "Hi" --service sms

Watch for New Messages

imsg watch --chat-id 1 --attachments

Service Options

  • --service imessage — Force iMessage (requires recipient has iMessage)
  • --service sms — Force SMS (green bubble)
  • --service auto — Let Messages.app decide (default)

Rules

  1. Always confirm recipient and message content before sending
  2. Never send to unknown numbers without explicit user approval
  3. Verify file paths exist before attaching
  4. Don't spam — rate-limit yourself

Example Workflow

User: "Text mom that I'll be late"

# 1. Find mom's chat
imsg chats --limit 20 --json | jq '.[] | select(.displayName | contains("Mom"))'

# 2. Confirm with user: "Found Mom at +1555123456. Send 'I'll be late' via iMessage?"

# 3. Send after confirmation
imsg send --to "+1555123456" --text "I'll be late"

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