A research team from Ethereum Protocol Fellowship and Invisible Garden has announced new progress on the Etheorem project, according to an Ethresearch forum post. According to Foresight News, the project aims to build a fully executable Ethereum consensus specification in Lean 4, using formal mathematical verification instead of traditional code testing to reduce logic flaws and prevent chain splits caused by implementation differences.

The specification has passed all test vectors for three future hard fork versions, Fulu, Gloas, including the ePBS mechanism, and Heze, covering core areas such as state transitions and fork choice. All logic is independently verified by the Lean kernel, and the project is intended to provide a high-security verification framework for Ethereum's future protocol upgrades.