21st April 2026

Agenda

1. Action items from the last call - Bosko

2. Haskell node - Jeff and/or Ramsay

3. Hard Fork Tentative Timeline

4. Risk log

5. Plutus Cost Model

   1. Impact on preview

6. 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

• Bosko Majdanac & Ryan Williams: Update the Master Timeline to reflect the May 28th submission date and the potential June enactment.

• Leonard Hegarty: Lead the direct outreach to DApps to confirm Preview testing results and lack of hardcoding issues.

• Samuel Leathers & IO Team: Provide the Node v11.0 Mainnet-ready release by next week and resolve the minor issue regarding creating new testnets when experimental flags are disabled.

• Bosko Majdanac: Assign a single, specific owner to each item in the Risk Register to ensure clear accountability.

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

• Bosko Majdanac & Leonard Hegarty: Repurpose this Thursday’s X Space to be a technical session specifically for DApps and the Plutus Cost Model to address the hardcoding risks found on Preview.

• Kevin Hammond & Ryan Williams: Finalize the metadata to chain the Committee Minimum Size reduction action onto the Plutus parameter update.