Borrowing it
Nothing to install: this file belongs to mesopelagique/mcp-4d-docs. 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/mesopelagique/mcp-4d-docs/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/mesopelagique/mcp-4d-docsWrote 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/mesopelagique/mcp-4d-docs/copilot-instructions)<a href="https://agentmods.dev/instructions/mesopelagique/mcp-4d-docs/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/mesopelagique/mcp-4d-docs/copilot-instructions/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/mesopelagique/mcp-4d-docs/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/mesopelagique/mcp-4d-docs/copilot-instructions.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 | $0.00307 | $0.00307 |
| Opus 5.5 | $0.00123 | $0.00123 |
| Sonnet 5.5 | $0.00061 | $0.00061 |
| Haiku 4.5 | $0.00031 | $0.00031 |
Grade C, and why
mcp-4d-docs copilot-instructions.md scanned grade C 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- Use this file to provide workspace-specific custom instructions to Copilot. --> What it actually says
Project: mcp-4d-docs
This is a TypeScript-based Model Context Protocol (MCP) server that provides tools to fetch and cache 4D command documentation.
Key Features
- Fetch 4D command documentation from https://developer.4d.com/docs/commands/
- Extract article content from HTML
<article>tag within<main>tag - Cache results in OS system cache for performance
- Open documentation URLs in default web browser
- Three tools:
get_4d_command_docs,clear_4d_docs_cache, andopen_4d_command_in_browser
Development Guidelines
- Node.js 18+ and TypeScript required
- Uses MCP SDK for TypeScript
- Cheerio for HTML parsing
- Node built-in modules (fs, crypto, os, path) for caching
- System cache for documentation storage (macOS: ~/Library/Caches, Windows: %LOCALAPPDATA%, Linux: ~/.cache)
Running the Server
# Build TypeScript
npm run build
# Run the server
node build/index.js
# Testing with MCP Inspector
npx @modelcontextprotocol/inspector node build/index.js
URL Encoding
Command names are converted to lowercase with spaces replaced by hyphens:
- "ACTIVITY SNAPSHOT" → "activity-snapshot"
- "ARRAY TO LIST" → "array-to-list"
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 · 37 lines · 307 tokens per session scan C 80575c6d4943
mcp-4d-docs copilot-instructions.md is an instructions file published in the GitHub repository mesopelagique/mcp-4d-docs (0 stars, last pushed 1y ago), licensed MIT. It adds 307 tokens to every session, about $0.0012 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
mcp-4d-docs copilot-instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mcp-4d-docs copilot-instructions.mdmesopelagique/mcp-4d-docs | Instructions file | 0 | 1y ago | MIT | C | 307 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 3d ago | MIT | A | 4,313 | Codex, OpenCode |