leanscreen

leanscreen is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from ibrahimmian36/leanscreen. Its token cost is not measured, scanned A, original, no licence file.

A command-line and MCP tool that compares informal statements with Lean 4 statements, where Lean 4 is a programming language used to write and check formal proofs.

In plain words
What is it for?
It helps review informal-to-formal statement pairs during theorem formalization.
Why use it?
It can flag whether a formal statement appears faithful to its informal counterpart, while making clear that it does not prove the match is correct.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Part of the leanscreen plugin — 1 skill, 1 MCP server shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/ibrahimmian36/leanscreen/leanscreen
Clone the repo
git clone --depth 1 https://github.com/ibrahimmian36/leanscreen

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Or install leanscreen, the plugin that ships this one along with the rest of its 1 skill, 1 MCP server.

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.

agentmods badge for leanscreen

README.md
[![agentmods](https://agentmods.dev/badge/mcp/ibrahimmian36/leanscreen/leanscreen.svg)](https://agentmods.dev/mcp/ibrahimmian36/leanscreen/leanscreen)
Your own site
<a href="https://agentmods.dev/mcp/ibrahimmian36/leanscreen/leanscreen"><img src="https://agentmods.dev/badge/mcp/ibrahimmian36/leanscreen/leanscreen.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

leanscreen 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 4d 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.

listed in the official MCP registry · 8 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 4d ago First seen · 8 lines scan A 0e0920267d31

Subscribe to this mod's changes

leanscreen is an MCP server published in the GitHub repository ibrahimmian36/leanscreen (6 stars, last pushed 15d ago), with no licence file. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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.

Related

Other mcp servers, from other repositories

leanforge-mcp

MCP server "leanforge-mcp" as configured in sandraschi/leanforge-mcp. Launched with https://github.com/sandraschi/leanforge-mcp/releases/download/v0.1.0/leanforge-m.

sandraschi/leanforge-mcp · not measured

crosslink-agent-prompt

MCP server "crosslink-agent-prompt" as configured in Corvidae-Coding-Projects/Thermite. Runs locally from the .claude/mcp/agent-prompt-server.py Python package.

Corvidae-Coding-Projects/Thermite · not measured

crosslink-knowledge

MCP server "crosslink-knowledge" as configured in Corvidae-Coding-Projects/Thermite. Runs locally from the .claude/mcp/knowledge-server.py Python package.

Corvidae-Coding-Projects/Thermite · not measured

crosslink-safe-fetch

MCP server "crosslink-safe-fetch" as configured in Corvidae-Coding-Projects/Thermite. Runs locally from the .claude/mcp/safe-fetch-server.py Python package.

Corvidae-Coding-Projects/Thermite · not measured

mathlas

A tool FOR an AI (no API key, no LLM): search existing math over a 3.7M-doc index + airtight numeric/Lean verification + mathlib search (Loogle/LeanSearch) + OEIS/PSLQ identification + needs guarantees scaffolds, served over MCP. Runs locally from the mathlas-mcp Python package. Needs 2 environment variables to run.

Archerkattri/mathlas · not measured

mcp-server

Exact-action approval for consequential agent actions: request, track, and verify signed receipts. Runs locally from the @emilia-protocol/mcp-server npm package. Needs 3 environment variables to run.

emiliaprotocol/emilia-protocol · not measured