30th April 2026

Agenda

1. Action items from the last call - Bosko

2. Node v11 readiness - Sam/Ramsay/Jeff

3. Van Rossem Upgrade Update - Bosko, all

   1. Readiness tracker

4. van Rossem comms plan - Bosko / Ian / Larisa

   1. Key dates and events for van Rossem upgrade - April, May, June 2026

5. Hard Fork Detailed Timeline

6. Risk log

7. Incident RACI (van Rossem)

8. Plutus Cost Model

9. AOB

Key materials

• Summary

  • Van Rossem Upgrade Update

    • Mainnet epoch boundaries have been added

    • Date specified for HF initiation GA submission on preview - 5th May, enactment expected same week

    • Date specified for HF initiation GA submission on preprod - 12th May, enactment expected the week after (aligns with the plan agreed 2 days ago on the hfwg meeting) due to 5 days epoch duration

    • Date specified for HF initiation GA submission on mainnet - 29th May (its changed from 28th to align with the epoch 634)

  • Node v11 expected to be released on Monday, 4th May

  • Readiness tracker

    • Math applied is explained in the Summary tab of the tracker

    • It will be considered source of truth which will be edited live, as any change happen and snapshots of the readiness numbers will be taken for each hfwg meeting

  • van Rossem comms plan was presented by the Intersect comms team and all HFWG members are invited to give feedback and contribute with relevnt inputs for any respective comms item

  • Risk log is updated and comms risk likelihood reduced to L-M level

  • Incident RACI for van Rossem will be created so it reflects and complements the role of the Security Council

  • Plutus cost model governance actions submissions plan is going to be discussed at the parameter committee meeting later today with the update provided on the next hfwg meetin at the latest

• 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

• Bosko Majdanac: Add owners to each item in the readiness tracker

• Larisa McFarlane: Setup the weekly comms call with interested parties included

• Ryan Williams: Explore the possibility to use CF api for exchanges to fill in status to the readiness tracker automatically

• Bosko Majdanac: Setup a go/no-go poll on the next hfwg meeting on Tuesday, 5th May, whether to submit hf initiation governance action on preview testnet

• Bosko Majdanac: Add weekly status comms report to the agenda of the hfwg meeting as a standing item

• HFWG: Each working group member should like and repost comms posts, blogs related to van Rossem and reported to the working group channel

• Bosko Majdanac: Create incident RACI for van Rossem so it reflects and complements the role of the Security Council