Ethereum core developers made meaningful progress on the Glamsterdam upgrade during All Core Devs Testing (ACDT) Call #66, finalizing its CFI scope, advancing execution layer devnets, & clarifying the roadmap for ePBS & MEV-Boost discussions.

The meeting, facilitated by Parithosh, focused on stabilizing Devnet-2, reviewing execution layer EIPs already in scope, & resolving lingering inclusion debates that could impact Glamsterdam’s final composition.

• BALs Devnet-1 Stabilizes
• BALs Devnet-2 Scope Locked
• ePBS Testing Progress
• EIP-8037 Decision & CFI Finalization
• MEV-Boost Integration Discussion

BALs Devnet-1 Stabilizes

Developers confirmed that BALs Devnet-1 has reached a stable state after resolving sync issues across most clients. The devnet has been running reliably with EVM fuzzing in place, while parallel IO & execution testing were intentionally excluded from this phase.

With the environment now considered stable, benchmarking responsibilities have been formally shifted to Devnet-2, marking a clear handoff to the next stage of the testing process.

BALs Devnet-2 Scope Locked

The scope for BALs Devnet-2 is now clearly defined & limited to proposals considered mature enough for near-term testing. Included items:

• EIP-7843
• EIP-7778
• Pre-refund gas accounting alignment
• Receipt updates introducing a second field (already spec’d)
• EIP-7708 (PRs actively merging)
• EIP-8024 included without recent changes

Open design discussions tied to these proposals have been deferred to ACD & Devnet-3. PRs are expected to merge quickly, with Devnet-2 targeting rollout this week, although some clients may join slightly later.

ACDT#66 (Summary)👇
1/@parithosh_j facilitated the meeting
🟨Glamsterdam Devnets
🔹BALs Devnet 1 (Stefan)
- Sync issues fixed across most clients
- Stable runs with EVM fuzzing
- Parallel IO / execution not covered
➡️ benchmarking moved to BALs Devnet 2

🔹BALs Devnet 2 Scope… https://t.co/0F9UXIAaba— Pooja Ranjan | ranjan.eth (@poojaranjan19) January 19, 2026