Creating an @ethereum Lean Consensus client in Rust - Ream

Joined November 2024
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16 Jul 2025
1/ 🚀 Following the incredible momentum from Beam Day at EthCC[8] in Cannes, we are excited to share our view and draft proposal for Post-Quantum Devnet-1! Read further 👇 for the summary, or head straight to hackmd.io/qDK_bqMsTwiZ3Lk03d… for the full writeup.
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1/ 🧵 Lots brewing on Ream this week — new attestation scoring & aggregator metrics in the client, a per-branch trend breakdown in leanBench, more devnet-5 fixtures, Hive shifting from "add tests" to "clean house", and two fresh EPF execution-layer threads just opened up. 🚀
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10/ 🎯 Big week of momentum: devnet-5 / aggregation coverage climbing, Hive switching gears, and execution-layer work is very much on the table. Things to watch: the leanVM pin bump in leanSpec (unblocks split / merge vectors), and the two EPF design writeups landing soon.
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🧵 Ream developer's call #74 recap (Jun 2) Short one this week. Progress on aggregation test vectors, devnet-5 implementation, devnet-4 debugging, and Hive coverage. 👇
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It's been a week of steady building: aggregation vectors landing, devnet-5 finalizing against itself, and Hive gaining better visibility into runs. Watch for: the two-subnet aggregator-split PR going up, cross-client devnet-5 testing, and the devnet-4 node-crash investigation.
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