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mcp-documentation-server: Instructions file for GitHub Copilot

.github/copilot-instructions.md

mcp-documentation-server copilot-instructions.md is an instructions file for GitHub Copilot from andrea9293/mcp-documentation-server. It costs 1,147 tokens per session, scanned A, original, MIT.

Development instructions for a TypeScript MCP server that stores documents locally, creates searchable text representations, and provides semantic search. Semantic search finds text by meaning rather than only by matching exact words.

In plain words
What is it for?
Adding or changing document-management tools, search behavior, local storage, embedding models, configuration, and server startup code.
Why use it?
They explain the server’s architecture and main components, making changes easier to locate and reducing the need to infer how document storage and search work.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is andrea9293/mcp-documentation-server's own configuration. It tells GitHub Copilot how to work on mcp-documentation-server 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 mcp-documentation-server configures →

not rated 344repo +1 2mo ago A scan 1,147 tokens original MIT
View source ↗ andrea9293/mcp-documentation-server
Reuse

Borrowing it

Nothing to install: this file belongs to andrea9293/mcp-documentation-server. 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/andrea9293/mcp-documentation-server/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/andrea9293/mcp-documentation-server

Made for: GitHub Copilot.

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.

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README.md
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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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Your own site · 80×15
<a href="https://agentmods.dev/instructions/andrea9293/mcp-documentation-server/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/andrea9293/mcp-documentation-server/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,147 This file is loaded in full into every session.
When invoked 1,147 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 $0.01147 $0.01147
Opus 5.5 $0.00459 $0.00459
Sonnet 5.5 $0.00229 $0.00229
Haiku 4.5 $0.00115 $0.00115

Measured 2mo ago against content hash df0d2a0590ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-documentation-server copilot-instructions.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.

.github/copilot-instructions.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MCP Documentation Server - AI Coding Agent Instructions

Architecture Overview

This is a TypeScript-based Model Context Protocol (MCP) server providing document management and semantic search capabilities using local AI embeddings. Key architectural patterns:

  • FastMCP Framework: Uses fastmcp library for MCP server implementation with Zod schema validation
  • Modular Design: Core functionality split across DocumentManager, EmbeddingProvider, and utility modules
  • Local-First Storage: All data stored in ~/.mcp-documentation-server/ (no database required)
  • Lazy Loading: Embedding models load on-demand to avoid startup delays
  • Chunk-Based Search: Documents split into chunks with embeddings for granular semantic search

Core Components

Server Entry Point (src/server.ts)

  • Main FastMCP server with 8 MCP tools (add_document, search_documents, etc.)
  • Uses #!/usr/bin/env node shebang - this file becomes the CLI executable
  • Environment configuration via dotenv (loads .env files)
  • Singleton DocumentManager instance with lazy initialization

Document Management (src/document-manager.ts logic in server.ts)

  • Chunking Strategy: Text split into ~500-character chunks with overlap for better search
  • ID Generation: Uses timestamp + random suffix pattern (see generateId())
  • Storage: JSON files per document in data/ directory
  • File Processing: Supports .txt, .md, .pdf via uploads folder workflow

Embedding Providers (src/embedding-provider.ts)

  • Primary: TransformersEmbeddingProvider using @xenova/transformers (local ML)
  • Fallback: SimpleEmbeddingProvider (hash-based, no ML dependencies)
  • Model Selection: Via MCP_EMBEDDING_MODEL env var (default: Xenova/all-MiniLM-L6-v2)
  • Critical: Model downloads (~420MB) on first use - implement timeouts

Development Workflows

Build & Run Commands

npm run build      # TypeScript compilation + executable permissions (shx chmod)
npm start          # Direct tsx execution (development)
npm run dev        # FastMCP dev mode with hot reload
npm run inspect    # FastMCP web UI for tool testing

Read the full file on GitHub · 119 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 · 119 lines · 1,147 tokens per session scan A df0d2a0590ac

Subscribe to this mod's changes

mcp-documentation-server copilot-instructions.md is an instructions file published in the GitHub repository andrea9293/mcp-documentation-server (344 stars, last pushed 2mo ago), licensed MIT. It adds 1,147 tokens to every session, about $0.0046 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.

Data and AIDatabasesRAG and vectorsgeminiknowledge-basemcp-servermodel-context-protocol
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