paperproof-validator

Visualize Lean 4 proofs by extracting proof state at each tactic step and rendering hypotheses, goals, and transitions in a paper-like format. This displays the proof structure as it develops, making verification and debugging straightforward in VS Code or a React frontend.

Yes. Proof visualization extracts metadata from Lean's InfoTree for each tactic, displaying current hypotheses, goals, and state transitions. This step-by-step breakdown helps you understand how tactics transform the proof state toward the final conclusion.

Use proof visualization to inspect hypotheses and goals after each tactic executes. The paper-like rendering and VS Code integration let you track proof progress interactively, catching errors in logic or tactic application before completion.

Paperproof integrates directly with a Lean server and VS Code extension, requiring only a Lean 4 project. No additional dependencies or configuration is needed beyond a standard Lean development environment.

Proof visualization renders the full proof tree with hypotheses and goal transitions, letting you confirm that each tactic step logically advances toward the theorem. This visual verification catches unsound reasoning that textual proofs might obscure.

The metadata extraction and structured visual rendering produce proof states suitable for readers and documentation. Integration with React frontend and VS Code enables viewing and sharing proof visualizations in paper-like format for review and collaboration.