Intersect Submit van Rossem hard fork governance action for Cardano mainnet to honor Max van Rossem

Intersect don announce say dem don submit the van Rossem hard fork initiation governance action for Cardano mainnet. This action dey move Protocol Version 11 enter the next stage of on-chain governance, where DReps, the Constitutional Committee and stake pool operators go join for the approval process before any mainnet enactment fit happen.

The upgrade wey dem propose na intra-era hard fork, meaning say Cardano go still dey inside the Conway era while e dey introduce new protocol features. Intersect describe the upgrade as one step wey dey lay foundation for the next major era, Dijkstra, wey dem expect go bring Leios come the Cardano mainnet. Dem name the hard fork after Max van Rossem, Cardano community member wey contribute as developer, stake pool operator, DRep and Constitutional Convention delegate.

Van Rossem Hard Fork Action Don Submit for Cardano Mainnet

The van Rossem hard fork action dey propose make Cardano move to Major Protocol Version 11 and Minor Version 0. According to Intersect, the mainnet submission follow special Hard Fork Working Group meeting on June 15, 2026, with support from the Intersect Technical Steering Committee. Dem submit the action during epoch 637 on June 16, 2026.

The submission no dey activate the hard fork immediately. E dey begin the mainnet governance phase for the hard fork initiation action, and approval dey required through Cardano on-chain governance system. The action get expiration date of July 18, 2026, if dem no complete the process before that time.

The final timing now go depend on governance approval and the relevant epoch boundary, with mainnet enactment fit happen from late June enter July 2026.

The mainnet submission follow earlier testnet work. Preview move to Protocol Version 11 on May 8, 2026, while PreProd enact the hard fork on June 10, 2026 at 00:00 UTC. The related Plutus Cost Model parameter update for mainnet don already ratify, with enactment schedule for June 18, 2026 at 21:45 UTC.

Protocol Version 11 Dey Add Plutus and Ledger Updates

Protocol Version 11 include changes across Plutus, ledger rules and node infrastructure. One major Plutus change na the alignment of built-in functions across Plutus V1, V2 and V3. This one dey expand available functionality for older Plutus script versions and reduce differences between smart contract generations.

The upgrade still introduce new built-ins and native types. These include the Array type from CIP-138, the MaryEraValue type from CIP-153, modular exponentiation from CIP-109, dropList from CIP-132 and multi-scalar multiplication over BLS12-381 from CIP-133. These additions dey important for advanced cryptographic operations, data handling and more complex on-chain application development.

The update still add support for case expressions over built-in Bool, Integer and Data types inside Untyped Plutus Core. The aim na to improve script logic and make data matching operations more efficient.

For the ledger and node side, the upgrade include enforcement of VRF key uniqueness for stake pools, revised reference input rules for Plutus V1 and V2 scripts, movement of selected Constitutional Committee voting restriction checks enter ledger rules, clearer handling of non-matching withdrawals predicates and improved reporting for protocol parameter hash mismatch cases.

Cardano-node 11.0.1 don already release as the first node version wey dey support the Protocol Version 11 hard fork. The release go enable the network to move to Protocol Version 11 once the governance action don approve and enact on-chain.

Governance Vote Carry Community Dedication to Max van Rossem

The van Rossem hard fork still carry formal community dedication. The name dey honor Max van Rossem, wey die for October 2025 and bin active across several parts of the Cardano ecosystem. Intersect describe am as dedicated builder, developer, stake pool operator, DRep, Constitutional Convention delegate and wider community contributor.

After im death, the Cardano community vote early 2026 to dedicate the Protocol Version 11 hard fork in im honor. The info action, titled “Name Protocol Version 11 hard fork, van Rossem,” receive 83.62% DRep support and 4.44 billion ada for voting support.

Dem still include lasting dedication to Max van Rossem inside the proposal metadata. The naming place the hard fork inside both Cardano technical upgrade path and im governance record, linking the Protocol Version 11 process with community decision wey dem make before the mainnet submission.

Until enactment, the van Rossem hard fork remain active governance action. Im next steps go depend on on-chain voting, readiness tracking and the required governance thresholds. If dem approve and enact am, Protocol Version 11 go introduce new Plutus functionality, refined ledger rules and one mainnet upgrade process wey go progress under Cardano Voltaire governance framework.