Borrowing it
Nothing to install: this file belongs to VoCoufi/second-brain-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.
curl -O https://raw.githubusercontent.com/VoCoufi/second-brain-mcp/master/CLAUDE.mdgit clone --depth 1 https://github.com/VoCoufi/second-brain-mcpWrote 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.
[](https://agentmods.dev/instructions/vocoufi/second-brain-mcp/claude-md)<a href="https://agentmods.dev/instructions/vocoufi/second-brain-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/vocoufi/second-brain-mcp/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.
<a href="https://agentmods.dev/instructions/vocoufi/second-brain-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/vocoufi/second-brain-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01193 | $0.01193 |
| Opus 5 | $0.00596 | $0.00596 |
| Sonnet 5 | $0.00239 | $0.00239 |
| Haiku 4.5 | $0.00119 | $0.00119 |
Grade B, and why
second-brain-mcp 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 8d 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.
2. Configure in Claude Code settings at `~/.claude/settings.local.json`: How it starts
The opening of the file, as written. The whole thing — 118 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
This is an MCP (Model Context Protocol) server that captures structured markdown notes from Claude Code sessions. It automatically analyzes sessions with pattern detection and simple complexity analysis, and provides unified search/discovery features across all notes.
Build & Development Commands
# Install dependencies
pnpm install
# Build TypeScript → JavaScript (output: build/)
pnpm run build
# Watch mode (auto-rebuild on changes)
pnpm run watch
# Run server locally (builds first)
pnpm run dev
After making changes: Always run pnpm run build before testing the MCP server with Claude Code, as MCP servers execute from build/index.js, not source files.
Architecture
Entry Point & Server Setup
src/index.ts: MCP server implementation using@modelcontextprotocol/sdk- Registers 3 tools (capture_session_note, search_notes, generate_weekly_report)
- Handles tool execution via
CallToolRequestSchemahandler - Runs on stdio transport (communicates via stdin/stdout)
Core Data Flow (capture_session_note)
- Receive: SessionNote data (summary, commands, fileChanges, codeSnippets, tags, etc.)
- Analyze:
- Pattern detection (new-feature, bug-fix, refactoring, etc.) via
patternDetector.ts - Simple complexity analysis (simple/moderate/complex) based on file count via
analysisUtils.ts - Key file extraction and key changes generation via
analysisUtils.ts
- Pattern detection (new-feature, bug-fix, refactoring, etc.) via
- Format: Convert to markdown with emoji indicators via
noteFormatter.ts - Save: Markdown file + metadata JSON via
storage.ts
Service Modules (src/services/)
-
storage.ts: File operations - saves notes to~/notes/(or$SECOND_BRAIN_NOTES_DIR), organized by project subdirectories. Creates.meta.jsoncache files for fast queries. -
noteFormatter.ts: Converts SessionNote objects to markdown with emoji indicators, collapsible sections, and Key Changes bullets.
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.
- 8d ago First seen · 118 lines · 1,193 tokens per session scan B 3b6f2285d480
second-brain-mcp CLAUDE.md is an instructions file published in the GitHub repository VoCoufi/second-brain-mcp (3 stars, last pushed 9mo ago), licensed MIT. It adds 1,193 tokens to every session, about $0.0060 per session on Opus 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 2026-08-31.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.