According to Jihoon Song, Besu has begun integrating FOCIL on the Amsterdam framework, with an early draft pull request by RoboCopsGoneMad currently in the specification implementation stage. Teku has merged Heze fork boilerplate code, including FOCIL elements such as the InclusionList container, with Mehdi Aouadi planning progressive implementation. Meanwhile, Lodestar is finalizing ePBS devnet-0 and intends to rebase FOCIL once the network stabilizes.