28th April 2026

Agenda

1. Expectations alignment - Bosko

2. Meeting cadence - Bosko

3. Action items from the last call - Bosko

4. Haskell node - Sam/Ramsay/Jeff

5. Van Rossem Upgrade Update - Bosko, all

   1. Readiness tracker

6. Hard Fork Detailed Timeline

7. Risk log

8. Plutus Cost Model

9. AOB

Key materials

• Summary and action items

• Hard Fork Working Group communication channels

  • Discord — #wg-hard-fork

  • Weekly bulletins

  • Luma calendar

  • This weeks X space

• Tentative timeline

Action items and next steps

• Samuel Leathers / IO Team: Tag and release DB-Sync 13.7.0.4 (expected today/tomorrow) and prepare to promote Node v11.0 to Mainnet-ready status next week.

• Bosko Majdanac: Draft a formal Communications Plan by next meeting to address the rollout of protocol parameters and stakeholder engagement.

• Bosko Majdanac / Leonard Hegarty / Samuel Leathers: Schedule a "Show and Tell" technical session (via Google Meet/Discord) to demonstrate to DApp developers how to properly upgrade smart contracts for the new cost models.

• Bosko Majdanac: Update the Master Timeline with explicit epoch boundaries to reflect the May 28th submission target and June enactment.

• Leonard Hegarty: Continue outreach to DApp developers (specifically those using Aiken) to ensure they are testing against the v10.7.1/v11.0 builds.

• Terence McCutcheon: Circulate the finalized instructions and link for the publicly accessible Discord channel.

• Bosko Majdanac: Prepare the Readiness Tracker in a centralized Sheets file to granularly track the "percentage of completion" for each ecosystem tool and library.

• Kevin Hammond / Ryan Williams: Finalize metadata to ensure the Committee Minimum Size reduction is chained correctly to the Plutus parameter update on Mainnet.