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imessage-mcp: Instructions file for Codex

AGENTS.md

imessage-mcp AGENTS.md is an instructions file for Codex, OpenCode from tszaks/imessage-mcp. It costs 544 tokens per session, scanned A, original, MIT.

A set of instructions for developing and safely testing an iMessage MCP server. The server reads the macOS Messages database and can send messages through AppleScript.

In plain words
What is it for?
It is for installing, building, testing, and running this Node.js server, and for understanding its code layout and message tools.
Why use it?
It documents the build and test rules, including how to avoid sending real messages or changing the real Messages database during tests.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is tszaks/imessage-mcp's own configuration. It tells Codex and OpenCode how to work on imessage-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything imessage-mcp configures →

not rated 2repo 6d ago A scan 544 tokens original MIT
View source ↗ tszaks/imessage-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to tszaks/imessage-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tszaks/imessage-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/tszaks/imessage-mcp

Made for: Codex, OpenCode.

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Per session 544 This file is loaded in full into every session.
When invoked 544 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00544 $0.00544
Opus 5.5 $0.00218 $0.00218
Sonnet 5.5 $0.00109 $0.00109
Haiku 4.5 $0.00054 $0.00054

Measured 4d ago against content hash ada23f84e4b5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

imessage-mcp AGENTS.md 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 4d 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.

AGENTS.md · 29 lines

How it starts

The opening of the file, as written. The whole thing — 29 lines — stays where its author put it; the contents beside it link to each section on GitHub.

iMessage MCP

An MCP server (Node.js, CommonJS, stdio) that reads the macOS Messages database and sends messages through AppleScript. Dependencies: @modelcontextprotocol/sdk and better-sqlite3.

This file is for AI agents that work on this code. If you only use the server, read the README.

Build, test, run

  • Node 18 up to but not including 26. Use Node 24 (better-sqlite3 does not build on Node 26). On Homebrew: PATH=/opt/homebrew/opt/node@24/bin:$PATH.
  • Install: npm install (or npm ci).
  • Test: npm test (node --test). Run the whole suite before you say something works. Tests use mocks and temporary databases.
  • Run: node index.js (stdio server; waits for an MCP client).
  • Never run the server against the real Messages database to test sending. Do not call send_message, send_message_batch, react_to_message or any mutation tool for real. Use the injected runScript and temporary databases the tests use.
  • Do not touch ~/Library/Messages, and do not launch the Messages app.

Code map

  • index.js: everything else. Tool registration (the tools list in the ListTools handler), tool handlers, attributedBody decoder, contact cache (AddressBook SQLite), AppleScript builders, release-flag gating (IMESSAGE_MCP_RELEASES), backup and delete logic.
  • lib/batch.js: batch preview, approval tokens.
  • lib/outreach.js: follow-up classification for find_outreach_followups.
  • test/: mcp-tools.test.js, mutation-tools.test.js, batch.test.js, outreach.test.js.

Conventions

  • Match the surrounding code: naming, comment density, idiom. Comments say why, not what.
  • Plain CommonJS. No new dependencies without discussion.
  • Sending, reacting and deleting stay behind confirm: true (plus an approval token for batches and delete_threads). Do not weaken a gate.
  • Mutation and UI-automation tools stay behind release flags. A tool that needs a flag must not be listed without it.
  • The server makes no network requests. Do not add any.
  • Never put real messages, phone numbers or contact names in code, tests or docs.
  • When you add or change a tool or release flag, update the README tools table and release flags table, and CHANGELOG.md.

Read the full file on GitHub · 29 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.

  1. 4d ago First seen · 29 lines · 544 tokens per session scan A ada23f84e4b5

Subscribe to this mod's changes

imessage-mcp AGENTS.md is an instructions file published in the GitHub repository tszaks/imessage-mcp (2 stars, last pushed 6d ago), licensed MIT. It adds 544 tokens to every session, about $0.0022 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-25.

TestingUnit testingappleapplescriptclaudeimessagemcpnodejs
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