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lean4

Automate Lean4 proof development with LSP-powered editing and mathlib lemma search.

Updated Apr 11, 2026
Search Tags:#mathlib#lsp#lean4#formalization#proof-assistant
One-click install
npx skills add https://github.com/Wenbobobo/AutoArchon --skill lean4-wenbobobo
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: lean4
Source: https://github.com/Wenbobobo/AutoArchon/tree/main/.archon-src/skills/lean4/skills/lean4
Command: npx skills add https://github.com/Wenbobobo/AutoArchon --skill lean4-wenbobobo

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Lean developers often struggle with editing Lean files, debugging Lean builds, and locating relevant mathlib lemmas. This Skill provides an interactive, LSP-powered assistant to streamline Lean4 proof development, search, and formalization workflows.

Core Features & Use Cases

  • LSP-based real-time feedback for goals, diagnostics, and lemma search while editing Lean files.
  • Guided proof cycles: plan → work → checkpoint → review → replan → continue for both interactive proving and autonomous proof repair.
  • Extensive reference material and learning aids to navigate mathlib, tactics, and documentation.

Quick Start

Open a Lean file and start /lean4:prove to begin an interactive proof session.

Frequently Asked Questions about lean4

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I debug Lean4 type errors when editing Lean files?▼

To debug Lean4 type errors when editing Lean files, use an interactive, LSP-powered assistant that provides real-time feedback on goals and diagnostics to streamline proof development.

What is the best way to search mathlib for relevant lemmas during formalization?▼

The best way to search mathlib for lemmas during formalization is using an LSP-powered assistant that queries mathlib directly while editing Lean files to locate relevant proofs.

How do I start an interactive proof session in Lean4?▼

To start an interactive proof session in Lean4, open a Lean file and invoke the prove command to enter a guided cycle of planning, working, checkpointing, and reviewing.

Can I automate proof repair cycles for Lean4 formalization workflows?▼

Yes, you can automate proof repair cycles for Lean4 formalization workflows using a structured cycle-engine that iteratively plans, checks, and replans to ensure safe incremental progress.

Does LSP tooling support autonomous proving in Lean4?▼

LSP tooling supports autonomous proving in Lean4 by powering an assistant that delivers real-time diagnostics and guides formalization workflows through interactive and autoprove cycles.

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