Tau Lepton

zkEVM @ Ethereum Foundation

Slides and writeups on Ethereum scaling, optional execution proofs, zkEVM infrastructure, data availability, and proof-system design.

EIP-8025

Deck
Overview Deck

Visual resource deck covering the execution proof flow.

Deck
May 14, 2026
ACDC Proposal

Proposal for optional execution proofs in Hegota.

Progress
Feb 11, 2026
Feb 11 Progress

Consensus layer integration, proof engine, and proof gossip protocol.

Progress
Mar 11, 2026
Mar 11 Progress

Optional proof design and implementation progress.

Progress
Apr 8, 2026
Apr 8 Progress

Protocol updates, implementation status, and open questions.

Progress
May 13, 2026
May 13 Progress

Latest EIP-8025 progress, implementation work, and devnet status.

Progress
Jun 10, 2026
Jun 10 Progress

Weak-subjectivity proof sync, BiB PoC, Lighthouse upstreaming, and EL-IR specification.

Writeup
Lighthouse Architecture

Maintainer-facing architecture writeup for the Lighthouse EIP-8025 implementation.

Writeup
Re-signing note

Design note explaining why validator proof re-signing was deprecated.

Writeup
Proof gossip

Network writeup covering announcement, fetch, and proof-gossip tradeoffs.

Writeup
Checkpoint execution proof sync

Design note for recursive execution-proof sync from a weak-subjectivity checkpoint using BeaconChainProof and execution-proof bindings.

Post Quantum Data Availability

Deck
May 8, 2026
PQ RS Proofs with LeanVM

Proof systems for Reed-Solomon codes and data-availability sampling.

Writeup
PQ RS Proofs with LeanAIR

LeanAIR experiment proving a post-quantum Reed-Solomon data-availability commitment with only the essential Poseidon, WHIR, wiring, and row-code checks.

Writeup
Pipelined PQ blob dissemination

Short bandwidth analysis using a concrete 100 kB proof example to compare pipelined column-sample diffs against an end-of-slot burst.

Formal Verification

Deck
Jun 9, 2026
Proving the EL State Machine — EL-IR

Specifying the EL state machine as an EL-IR intermediate representation for execution proving.

Deck
Jun 2026
evm-sail — A formal specification of the EVM

Formal, executable EVM specification in Sail — one source of truth, with a kernel-interface design and extraction to Lean, Islaris, C, RISC-V and Rocq for proofs, conformance and a zkEVM guest.