# Week 5 & 6 Update

Hi there, this week has been mainly reading the Nimbus code and implementing era types in lodestar in [this pr](https://github.com/ChainSafe/lodestar/pull/8035). I am nearly finished with the types and implementing the reading and writing of era files

## From Typescript to Thunder ⚡

I also got my first pr [first pr](https://github.com/ChainSafe/ssz-z/issues/27) merged in zig in a library for equals api.

# Reading
- nimbus code
- An overview of the last 4-5 weeks of core dev in this [blog](https://blog.ethereum.org/2025/07/29/checkpoint-5) and also this blog about [history expiry](https://blog.ethereum.org/2025/07/08/partial-history-exp)

# Work for the week
- Work on another zig ssz issue
- complete my era file pr and get it merged