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openmessage: Instructions file for Claude Code

CLAUDE.md

openmessage CLAUDE.md is an instructions file for Claude Code from MaxGhenis/openmessage. It costs 3,969 tokens per session, scanned A, original, Unlicense.

Project instructions for OpenMessage, a local message database and built-in MCP server. OpenMessage imports conversations from Google Messages, Google Chat, iMessage, and WhatsApp into one system.

In plain words
What is it for?
Developing, debugging, supporting, or extending OpenMessage's Go commands, SQLite storage, message importers, MCP tools, web interface, and macOS app.
Why use it?
They explain the project structure and operating rules so an AI assistant can work with imported messages and the local command-line and web applications correctly.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions Claude Code.

This is MaxGhenis/openmessage's own configuration. It tells Claude Code how to work on openmessage 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 openmessage configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/maxghenis/openmessages.

not rated 65repo +1 changed today A scan 3,969 tokens original Unlicense
View source ↗ MaxGhenis/openmessage openmessage.ai
Reuse

Borrowing it

Nothing to install: this file belongs to MaxGhenis/openmessage. 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/MaxGhenis/openmessage/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/MaxGhenis/openmessage

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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Per session 3,969 This file is loaded in full into every session.
When invoked 3,969 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.03969 $0.03969
Opus 5.5 $0.01588 $0.01588
Sonnet 5.5 $0.00794 $0.00794
Haiku 4.5 $0.00397 $0.00397

Measured today against content hash e57a15795121, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

openmessage CLAUDE.md scanned grade A with 1 finding 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 today.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -o /dev/null -w "%{http_code}" https://openmessage.ai
CLAUDE.md · 292 lines

How it starts

The opening of the file, as written. The whole thing — 292 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenMessage

Local-first universal message database with built-in MCP server. Ingests messages from SMS/RCS (Google Messages), Google Chat, iMessage, and WhatsApp.

Architecture

├── cmd/              Go CLI commands (pair, serve, send, read, status, import)
├── internal/
│   ├── app/          Bootstrap, data dir, backfill
│   ├── client/       libgm Google Messages protocol
│   ├── db/           SQLite store (conversations, messages, contacts, unified_contacts, drafts)
│   ├── importer/     Multi-platform import adapters (gchat, imessage, whatsapp)
│   ├── story/        Stats computation + narrative story generation
│   ├── tools/        MCP tools (24 tools)
│   ├── viz/          Relationship visualization renderer (self-contained HTML)
│   └── web/          HTTP API + embedded React UI
├── macos/            Swift macOS app wrapper
│   ├── OpenMessage/  Swift package (BackendManager, PairingView, etc.)
│   └── build.sh      Builds universal binary + .app + .dmg
├── site/             Static website (deployed to openmessage.ai)
└── vercel.json       Vercel config (root — NOT site/vercel.json)

Supporting a live install (READ FIRST for support/debug tasks)

If you are debugging a real user's install — sends failing, re-pairing, reading their actual messages — read docs/agent-runbook.md before touching anything. The traps that cost the most:

  • Two data dirs, not one. The macOS app's live store is ~/Library/Application Support/OpenMessage/ (set via OPENMESSAGES_DATA_DIR). The CLI default (~/.local/share/openmessage/) is a separate, usually stale store. Point CLI tools at the app dir for live data.
  • Read live messages via the HTTP API (/api/conversations/<id>/messages, /api/search, /api/status) — the app holds the WAL'd DB, so a direct sqlite3 reader hits "unable to open database file (14)".
  • Re-pairing Google Messages: QR is dead; use Google Account pairing: with the user at the phone, quit the app and run OPENMESSAGES_DATA_DIR=... openmessage pair --google-chrome (reads the signed-in Chrome profile's cookies; the user taps the printed emoji). Don't over-reconnect (it throttles the account). Full recipe in the runbook.

Read the full file on GitHub · 292 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. today Changed · +10 lines · +195 tokens per session e57a15795121
  2. 7d ago Changed · +5 lines · +72 tokens per session 4f8a62dc5b96
  3. 11d ago Changed · +30 lines · +476 tokens per session 1bdedb721c33
  4. 1mo ago Changed · +21 lines · +371 tokens per session b5b0601ba6fb
  5. 1mo ago First seen · 226 lines · 2,855 tokens per session scan A 3289f271f71a

Subscribe to this mod's changes

openmessage CLAUDE.md is an instructions file published in the GitHub repository MaxGhenis/openmessage (65 stars, last pushed yesterday), licensed Unlicense. It adds 3,969 tokens to every session, about $0.0159 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Gogoogle-messageslocal-firstmacosmcprcs
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