GoKawiilTerence Tao rebuilds 'QED' logic textbook into app called 'Lean Grimoire'
Mathematician Terence Tao has used a coding agent to modernize a 2018 interactive textbook called 'QED', which taught propositional and first-order logic as a puzzle game. The rebuilt version, working-titled 'Lean Grimoire', adds features such as displaying an in-progress Lean proof alongside gameplay and an optional fantasy-themed mode that reskins mathematical elements as potions and scrolls. Tao is now seeking playtesters to help refine the app as a teaching tool for logic and Lean.
GoKawiil's interpretation of the reporting above, not reported fact.
The project illustrates how AI coding agents can let researchers revive and extend old educational software without deep engineering effort, potentially lowering the barrier to building niche learning tools. Tying gameplay directly to Lean, a formal proof assistant, suggests an aim to bridge casual logic puzzles with real theorem-proving practice, though its educational effectiveness remains to be tested through the playtesting Tao is requesting.
- Terence Tao rebuilt his 2018 'QED' logic textbook using a coding agent.
- The new app, tentatively called 'Lean Grimoire', can show an in-progress Lean proof during gameplay.
- Tao is seeking playtesters to improve its use for teaching logic and Lean.
Source: terrytao.wordpress.com — Terence Tao, 2026-11-12
Published there as: “Lean Grimoire”
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