What is lumo CLAUDE.md?

Project instructions for Lumo, a local desktop application that monitors Claude Code usage. It receives telemetry and hook events, stores data in a local SQLite database, and includes a Rust service, shared database library, Tauri app, and React interface.

Use them to work on the daemon, database layer, desktop integration, or React interface, while using pnpm and keeping data collection and storage local.

They explain the system's boundaries and privacy model, including that usage data stays on the user's machine and that pnpm is the required package manager.

How zhnd/lumo configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to zhnd/lumo. 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/zhnd/lumo/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/zhnd/lumo

Made for: Claude Code.

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/instructions/zhnd/lumo/claude-md/github.svg)](https://agentmods.dev/instructions/zhnd/lumo/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/zhnd/lumo/claude-md"><img src="https://agentmods.dev/badge/instructions/zhnd/lumo/claude-md/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/instructions/zhnd/lumo/claude-md"><img src="https://agentmods.dev/badge/instructions/zhnd/lumo/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,048 This file is loaded in full into every session.

When invoked 3,048 The same file — it is already loaded in full.

Security scan B 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.

Model	Per session	Once invoked
Fable 5.1	$0.03048	$0.03048
Opus 5.5	$0.01219	$0.01219
Sonnet 5.5	$0.00610	$0.00610
Haiku 4.5	$0.00305	$0.00305

Measured 2mo ago against content hash 3c2a9c35a1bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

lumo CLAUDE.md scanned grade B 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 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

3. Configures `~/.claude/settings.json` for OTLP export and hooks

CLAUDE.md · 290 lines

How it starts

The opening of the file, as written. The whole thing — 290 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Package Manager

This project uses pnpm exclusively. Always use pnpm / pnpm dlx instead of npm / npx.

Project Overview

Lumo is a local-first desktop application for monitoring Claude Code usage. It collects telemetry data via OpenTelemetry Protocol (OTLP) and hook events, then displays usage analytics in a native desktop UI.

Key characteristics:

No accounts, no cloud services, no data leaves your machine
All data stored locally in SQLite at ~/.lumo/
Daemon auto-installed and managed by the desktop app on macOS

Components

Daemon (crates/daemon/): Standalone HTTP service (Axum) that receives OTLP metrics/logs and hook notifications from Claude Code
Shared Library (crates/shared/): Common database layer (entities, repositories, migrations) used by both daemon and Tauri app
Tauri App (src-tauri/): Desktop application shell with native OS integration, IPC commands, and business services
Frontend (packages/ui/): React-based UI (pnpm workspace package @lumo/ui)

Module Documentation

Each module has its own CLAUDE.md with detailed patterns and guidelines:

crates/daemon/CLAUDE.md - Daemon service architecture
crates/shared/CLAUDE.md - Database layer and entity patterns
src-tauri/CLAUDE.md - Tauri backend, services, and IPC commands
packages/ui/CLAUDE.md - Frontend architecture and component patterns

Architecture

System Overview

Claude Code
  |
  |-- OTLP logs/metrics (HTTP JSON) --> Lumo Daemon (port 4318) --> SQLite (~/.lumo/lumo.db)
  |-- Hook events (/notify endpoint) ----^                              |
                                                                        v
                                                              Tauri App (reads DB)
                                                                        |
                                                                        v
                                                              React UI (Next.js SSG)

Read the full file on GitHub · 290 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.

2mo ago First seen · 290 lines · 3,048 tokens per session scan B 3c2a9c35a1bb

Subscribe to this mod's changes

lumo CLAUDE.md is an instructions file published in the GitHub repository zhnd/lumo (147 stars, last pushed 6mo ago), licensed MIT. It adds 3,048 tokens to every session, about $0.0122 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Analytics and metrics

lumo CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
lumo CLAUDE.mdzhnd/lumo	Instructions file	147	6mo ago	MIT	B	3,048	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

lumo: Instructions file for Claude Code