Lean Proof Assistant
SkillDev toolsInterface with Lean 4 proof assistant for formal theorem verification
Instructions available. Your AI can read the instructions. Execution depends on the setup they require.
Account requirements not reviewed. Check the skill instructions before use; ahel provides instructions and does not run this skill.
Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.
Then ask your AI: use the Lean Proof Assistant skill
What this skill tells your AI
The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/domains/science/mathematics/skills/lean-proof-assistant/SKILL.md and read by ahel’s review.
Purpose
Provides expert guidance on using the Lean 4 proof assistant for formal theorem verification and mathematical formalization.
Capabilities
- Parse informal proofs into Lean 4 syntax
- Generate tactic-based proof scripts
- Access Mathlib4 library for standard results
- Automated term rewriting and simplification
- Generate proof outlines with sorry placeholders
- Extract executable code from proofs
Usage Guidelines
- Proof Development: Use Lean 4 syntax with Mathlib4 conventions
- Tactic Application: Apply tactics systematically (intro, apply, exact, rw)
- Library Navigation: Search Mathlib4 for existing lemmas and theorems
- Proof Completion: Fill sorry placeholders incrementally
Tools/Libraries
- Lean 4
- Mathlib4
- Lake build system
- VS Code Lean extension
Signals
- GitHub stars
- 2k
- Forks
- 112
- Last commit
- Sep 2026
Advanced
- Item type
- skill
- Key
lean-proof-assistant- Source
- github.com/a5c-ai/babysitter