What is local-brain CLAUDE.md?

Project instructions for Local Brain, a local-first command-line project manager that stores workspaces, notes, and tasks in plain Markdown files.

Use them when changing Local Brain to understand brains, projects, the task inbox, repository links, build commands, and test commands.

They give coding agents the project’s structure and the commands needed to build and test it consistently.

How SanderMoon/local-brain configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to SanderMoon/local-brain. 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/SanderMoon/local-brain/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/SanderMoon/local-brain

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/sandermoon/local-brain/claude-md/github.svg)](https://agentmods.dev/instructions/sandermoon/local-brain/claude-md)

Your own site

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

Per session 1,901 This file is loaded in full into every session.

When invoked 1,901 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.

Model	Per session	Once invoked
Fable 5.1	$0.01901	$0.01901
Opus 5.5	$0.00760	$0.00760
Sonnet 5.5	$0.00380	$0.00380
Haiku 4.5	$0.00190	$0.00190

Measured 1mo ago against content hash b0676e998780, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

local-brain 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 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.

CLAUDE.md · 201 lines

How it starts

The opening of the file, as written. The whole thing — 201 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.

Project Overview

Local Brain is a minimalist, local-first project management CLI tool for developers. It manages Brains (high-level workspaces) and Projects (specific focus areas within a Brain), providing context management for notes, tasks, and code repositories.

Key Concepts:

Brains: Top-level workspaces (e.g., "Work", "Personal"). Only one brain is active at a time, symlinked to ~/brain
Projects: Focus areas within a brain. Each has notes.md, todo.md, and optional git repo links
Dump: Quick capture inbox (00_dump.md) for tasks/notes that get refiled to projects
Local-first: Plain text Markdown files, grep-able, version-controllable

Build & Test Commands

Building

make build              # Build binary to ./brain
make dev-install        # Install to ~/.local/bin
make install            # Install to /usr/local/bin (system-wide)

Testing

make test               # Fast unit tests only (default)
make test-all           # All tests including integration
make test-unit          # Unit tests only
make test-integration   # Integration tests only
make test-cover         # Generate coverage report (coverage.html)
make test-race          # Run with race detection

# Run single test
go test -v ./pkg/api -run TestGenerateItemID
go test -v ./pkg/config -run TestLoadConfig

Code Quality

make fmt                # Format code
make vet                # Run go vet
make lint               # Run golangci-lint (if installed)
make check              # Run all checks (fmt, vet, test)

Release

make snapshot           # Test release build without tags (artifacts in dist/)
make release            # Create production release (requires git tag)

Architecture

Package Structure

cmd/ - Cobra CLI commands (19 commands)

Each command in separate file (e.g., add.go, project.go, todo.go)
All register with rootCmd in their init() functions
root.go defines base command and version handling

Read the full file on GitHub · 201 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 · 201 lines · 1,901 tokens per session scan A b0676e998780

Subscribe to this mod's changes

local-brain CLAUDE.md is an instructions file published in the GitHub repository SanderMoon/local-brain (9 stars, last pushed 7mo ago), licensed MIT. It adds 1,901 tokens to every session, about $0.0076 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.

Project management agent-skills agentic-ai ai-agents ai-tools claude cli

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

local-brain: Instructions file for Claude Code