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local-docs-mcp: Instructions file for Claude Code

CLAUDE.md

local-docs-mcp CLAUDE.md is an instructions file for Claude Code from umputun/local-docs-mcp. It costs 1,483 tokens per session, scanned A, original, MIT.

A set of project instructions for building a local documentation server in Go. The server lets an agent search, read and list Markdown documents from several local sources through the Model Context Protocol.

In plain words
What is it for?
Use it when developing or maintaining the local-docs-mcp project, especially its document search, reading, listing, scanning and server components.
Why use it?
It gives developers a shared structure and rules for handling local documentation safely, including path checks, typed data and separated responsibilities. This reduces confusion when maintaining the server.

Instructions file for Claude Code

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

This is umputun/local-docs-mcp's own configuration. It tells Claude Code how to work on local-docs-mcp 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 local-docs-mcp configures →

not rated 21repo 2mo ago A scan 1,483 tokens original MIT
View source ↗ umputun/local-docs-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to umputun/local-docs-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.

Copy the file
curl -O https://raw.githubusercontent.com/umputun/local-docs-mcp/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/umputun/local-docs-mcp

Made for: Claude Code.

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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.

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<a href="https://agentmods.dev/instructions/umputun/local-docs-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/umputun/local-docs-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,483 This file is loaded in full into every session.
When invoked 1,483 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 $0.01483 $0.01483
Opus 5.5 $0.00593 $0.00593
Sonnet 5.5 $0.00297 $0.00297
Haiku 4.5 $0.00148 $0.00148

Measured 2mo ago against content hash 129b782d5a1a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

local-docs-mcp 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 · 254 lines

How it starts

The opening of the file, as written. The whole thing — 254 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Local Docs MCP Server - Development Guide

Project Overview

Go implementation of Model Context Protocol (MCP) server providing Claude with access to local markdown documentation from multiple sources.

Original implementation: ~/.dot-files/claude/local-docs-mcp.py

Architecture

Package Responsibilities

app (main)
  • entry point and initialization
  • logging setup
  • server lifecycle management
  • stdio transport configuration
app/server
  • MCP server creation and configuration
  • tool registration with official SDK
  • server startup and shutdown
app/tools
  • tool implementations (search_docs, read_doc, list_all_docs)
  • input/output type definitions
  • fuzzy matching logic
  • business logic isolated from MCP protocol
app/scanner
  • file discovery across sources (commands, project-docs, project-root)
  • safe path resolution preventing traversal
  • file metadata collection (size, source)
  • directory walking with filtering rules

Design Principles

Type Safety

  • use structs with JSON tags for all tool inputs/outputs
  • leverage Go's type system for compile-time safety
  • no interface{} except where SDK requires it

Error Handling

  • return errors to caller, never panic
  • wrap errors with context using fmt.Errorf
  • consistent error response format for MCP tools

Testing

  • minimum 80% coverage
  • table-driven tests for all functions
  • integration tests with real file fixtures
  • separate unit tests from integration tests

Security

  • safe path resolution mandatory for all user inputs
  • no symlink following outside base directories
  • reject absolute paths
  • validate file sizes before reading
  • UTF-8 validation on file content

Dependencies

Core

  • github.com/modelcontextprotocol/go-sdk/mcp - official MCP SDK

Utilities

  • github.com/sahilm/fuzzy or github.com/lithammer/fuzzysearch/fuzzy - fuzzy matching
  • github.com/stretchr/testify - testing assertions

Optional

  • github.com/go-pkgz/lgr - logging (or use standard log)

Read the full file on GitHub · 254 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 · 254 lines · 1,483 tokens per session scan A 129b782d5a1a

Subscribe to this mod's changes

local-docs-mcp CLAUDE.md is an instructions file published in the GitHub repository umputun/local-docs-mcp (21 stars, last pushed 2mo ago), licensed MIT. It adds 1,483 tokens to every session, about $0.0059 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 2026-08-30.

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