A command-line tool for reading and sending iMessages and SMS messages through the macOS Messages app. It supports text messages and sending files with a message.

Use it to list chats, read conversation history, inspect attachment information, and send iMessages or SMS messages to phone numbers or Apple IDs.

It lets an agent work with Messages conversations from the terminal instead of requiring manual copying between the app and another tool.

imessage — Skill for Claude Code and Codex by MilkyWay008/Hermes-OTG

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 MilkyWay008/Hermes-OTG --skill imessage

Clone the repo

git clone --depth 1 https://github.com/MilkyWay008/Hermes-OTG

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/milkyway008/hermes-otg/imessage/github.svg)](https://agentmods.dev/skills/milkyway008/hermes-otg/imessage)

Your own site

<a href="https://agentmods.dev/skills/milkyway008/hermes-otg/imessage"><img src="https://agentmods.dev/badge/skills/milkyway008/hermes-otg/imessage/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/milkyway008/hermes-otg/imessage"><img src="https://agentmods.dev/badge/skills/milkyway008/hermes-otg/imessage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 662 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 100% 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	$0.00019	$0.00662
Opus 5.5	$0.00008	$0.00265
Sonnet 5.5	$0.00004	$0.00132
Haiku 4.5	$0.00002	$0.00066

Measured 1mo ago against content hash bc68b1648e30, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

imessage 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 1mo 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

100% identical to imessage — 0 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.

data/skills/apple/imessage/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section 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

Always confirm recipient and message content before sending
Never send to unknown numbers without explicit user approval
Verify file paths exist before attaching
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"

Read the full file on GitHub · 103 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.

1mo ago First seen · 103 lines · 19 tokens per session scan A bc68b1648e30

Subscribe to this mod's changes

imessage is a skill published in the GitHub repository MilkyWay008/Hermes-OTG (20 stars, last pushed 2mo ago), licensed MIT. It adds 19 tokens to every session and 662 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to imessage, differing in 0 lines, and is treated as a copy.

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