A command-line skill for reading and sending iMessage or SMS through macOS Messages. It can inspect chats and conversation history, including attachment information.

Listing recent chats, reading message history, checking attachments, and sending messages to phone numbers or Apple IDs.

It lets an agent work with Messages conversations from the terminal. This avoids manually searching the Messages app when the user needs supported message actions.

imsg — Skill for Claude Code and Codex by YeSongYun

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add YeSongYun/openclaw-cn --skill imsg

Clone the repo

git clone --depth 1 https://github.com/YeSongYun/openclaw-cn

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/yesongyun/openclaw-cn/imsg/github.svg)](https://agentmods.dev/skills/yesongyun/openclaw-cn/imsg)

Your own site

<a href="https://agentmods.dev/skills/yesongyun/openclaw-cn/imsg"><img src="https://agentmods.dev/badge/skills/yesongyun/openclaw-cn/imsg/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/yesongyun/openclaw-cn/imsg"><img src="https://agentmods.dev/badge/skills/yesongyun/openclaw-cn/imsg.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 773 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 92% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00021	$0.00773
Opus 5	$0.00010	$0.00387
Sonnet 5	$0.00004	$0.00155
Haiku 4.5	$0.00002	$0.00077

Measured 10d ago against content hash 55dd0913fbc1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

imsg scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

92% identical to imsg — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/imsg/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

imsg

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

When to Use

✅ USE this skill when:

User explicitly asks to send iMessage or SMS
Reading iMessage conversation history
Checking recent Messages.app chats
Sending to phone numbers or Apple IDs

When NOT to Use

❌ DON'T use this skill when:

Telegram messages → use message tool with channel:telegram
Signal messages → use Signal channel if configured
WhatsApp messages → use WhatsApp channel if configured
Discord messages → use message tool with channel:discord
Slack messages → use slack skill
Group chat management (adding/removing members) → not supported
Bulk/mass messaging → always confirm with user first
Replying in current conversation → just reply normally (Clawdbot routes automatically)

Requirements

macOS with Messages.app signed in
Full Disk Access for terminal
Automation permission for Messages.app (for sending)

Common Commands

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

Watch for New Messages

imsg watch --chat-id 1 --attachments

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

# Specify service
imsg send --to "+14155551212" --text "Hi" --service imessage
imsg send --to "+14155551212" --text "Hi" --service sms

Service Options

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

Safety Rules

Always confirm recipient and message content before sending
Never send to unknown numbers without explicit user approval
Be careful with attachments — confirm file path exists
Rate limit yourself — don't spam

Read the full file on GitHub · 123 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

10d ago First seen · 123 lines · 21 tokens per session scan A 55dd0913fbc1

Subscribe to this mod's changes

imsg is a skill published in the GitHub repository YeSongYun/openclaw-cn (56 stars, last pushed 3mo ago), licensed MIT. It adds 21 tokens to every session and 773 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 92% identical to imsg, differing in 2 lines, and is treated as a copy.

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imsg

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

This is a copy

How it starts

imsg

When to Use

When NOT to Use

Requirements

Common Commands

List Chats

View History

Watch for New Messages

Send Messages

Service Options

Safety Rules

What this file has done since we first saw it

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