14th May 2026

Agenda

1. Action items from the last call - Bosko

2. Node 11.0.1 & DBSync 13.7.0.5 - Sam/Ramsay/Jeff

3. Van Rossem Upgrade Update - Bosko, all

   1. Ogmios PR

   2. Kupo PR #1 & PR#2

   3. Readiness tracker

4. van Rossem hard fork progress - Bosko

   1. PreProd

      1. Cardanoscan

      2. Cexplorer

      3. Are we ready to vote, ratify and enact hf ga on preprod? (first possible enactment date is 21st May if its voted for until 16th May - epoch boundary on PreProd)

   2. Mainnet

      1. Are we on the track to submit it on 29th May?

5. Plutus Cost Model - Kevin, Ryan, Bosko

   1. PreProd - submitted and ratified, will be enacted at epoch boundary on 16th May

   2. Mainnet

6. van Rossem comms - Ian / Larisa

   1. Comms plan - CF, Midnight, Shielded, Emurgo, Intersect, IO

      1. Slack channel created

      2. Weekly comms meeting scheduled

   2. Comms in the last week - anything we missed

   3. Comms in the week ahead

7. Risk log

8. AOB

Key materials

• Summary

  • Ogmios and Kupo readiness continues to be the biggest challenge for the hard fork progress

  • Hard Fork Working Group decided to not recommend forking the Cardano PreProd network until there are merged PRs that are addressing Ogmios and Kupo hard fork readiness which can happen in the next few days

    • Likely, the first possible hard fork enactment date on PreProd becomes 26th May (assuming it would be ratified on the previous epoch boundary on 21st May)

  • The above will be included in the comms plan to be executed in the following days

• Hard Fork Working Group communication channels

  • Discord — #wg-hard-fork

  • Weekly bulletins

  • Luma calendar

• van Rossem Upgrade Update

• van Rossem readiness tracker

Action items and next steps

• Ian, Larisa: Include in the comms plan and communicate the Ogmios and Kupo challenges to the wider community reassuring them PRs are being worked on and are coming soon

• Bosko: Have an initial call with IO and Intersect people on drafted van Rossem support RACI matrix