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chatmux: Instructions file for Claude Code

CLAUDE.md

chatmux CLAUDE.md is an instructions file for Claude Code from echoedinvoker/chatmux. It costs 2,037 tokens per session, scanned A, original, MIT.

Repository instructions for Chatmux, a local data service that connects chat platforms, stores messages, and provides search tools to AI clients. It is a data layer without a user interface.

In plain words
What is it for?
Use it when working on the daemon, chat-platform adapters, message storage, search, MCP tools, or Bun tests.
Why use it?
It explains the project structure, commands, storage design, and safety components so changes fit the existing system.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions Claude Code.

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

not rated 1repo 2mo ago A scan 2,037 tokens original MIT
View source ↗ echoedinvoker/chatmux
Reuse

Borrowing it

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

Made for: Claude Code.

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Per session 2,037 This file is loaded in full into every session.
When invoked 2,037 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 $0.02037 $0.02037
Opus 5.5 $0.00815 $0.00815
Sonnet 5.5 $0.00407 $0.00407
Haiku 4.5 $0.00204 $0.00204

Measured 2mo ago against content hash 080026112e4e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

chatmux CLAUDE.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 2mo 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.

CLAUDE.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

chatmux

Local-first personal chat data layer daemon. Connects IM platforms (v0.1: LINE) via child-process adapters, stores messages to JSONL + SQLite/FTS5, exposes MCP tools for AI clients (Claude Code). Not a chat app — no UI, pure data layer.

Commands

  • bun run start — Start daemon (core + adapters + MCP server)
  • bun test — Run all tests (bun:test)
  • bun run dev — Start daemon with --watch (auto-reload on change)

Directory Structure

  • src/core/daemon.ts — Entry: start storage → SafetyRail → adapter runner → MCP server
  • src/core/adapter-runner.ts — Spawn/watch/restart adapter child processes via stdio JSON-RPC
  • src/core/safety.ts — SafetyRail: RateLimiter → ErrorTracker → KillSwitch
  • src/core/storage/jsonl.ts — JSONL append-only event writer (truth source)
  • src/core/storage/sqlite.ts — SQLite schema + JSONL→SQLite sync (query view)
  • src/core/storage/fts.ts — FTS5 trigram setup + sync triggers
  • src/core/storage/query.ts — High-level queries: search, paginated read, event cursor, stats
  • src/core/storage/replay.ts — replayJsonl: rebuild SQLite by replaying JSONL through the projection
  • src/core/ingest.ts — Ingest boundary: shape validation + per-event isolation (no storage semantics)
  • src/core/mcp/server.ts — MCP Streamable HTTP on TCP (loopback by default, host settable) + unix socket (shared handler)
  • src/core/mcp/tools.ts — 8 MCP tools (list_chats, read_messages, read_events, search_messages, send_message, get_media, probe_latest, get_status)
  • src/core/mcp/resources.ts — 4 MCP resources + subscription
  • src/adapters/line/ — LINE adapter (Node+tsx, NOT Bun — LEGY Push needs HTTP/2)
  • examples/notifier/ — Reference consumer: cursor-based event tailing. NOT core (see NEVER #11)
  • tests/ — Mirrors src/ structure
  • docs/ — Architecture and protocol references
  • config/chatmux.service — systemd user service

Architecture

LINE adapter ←── stdio JSON-RPC ──→ core daemon ←── MCP Streamable HTTP ──→ Claude Code
(child process)                      ├─ SafetyRail  (127.0.0.1 TCP / unix socket)
                                     ├─ Storage (JSONL → SQLite/FTS5)
                                     ├─ Adapter Runner
                                     └─ MCP Server

Read the full file on GitHub · 134 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. 2mo ago First seen · 134 lines · 2,037 tokens per session scan A 080026112e4e

Subscribe to this mod's changes

chatmux CLAUDE.md is an instructions file published in the GitHub repository echoedinvoker/chatmux (1 stars, last pushed 2mo ago), licensed MIT. It adds 2,037 tokens to every session, about $0.0081 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 2026-08-31.

Claude CodeDatabasesbunclaudedeveloper-toolslinelocal-first
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