Summary Cardano’s Dijkstra rollout includes Linear Leios and Nested Transactions in Phase 1, while Peras forms the second planned implementation phase. Amaru is becoming another Cardano node
Cardano developers are preparing major node and protocol changes as the network moves toward its planned Dijkstra hard fork. Intersect confirmed that the agreed scope and target dates remain unchanged, keeping the Dijkstra implementation aligned with its existing roadmap. The upgrade will arrive through two phases, allowing developers to introduce several network capabilities through separate deployments.
Phase 1 will bring Nested Transactions and Linear Leios to the Cardano mainnet, with delivery targeted for late 2026. This structure gives developers a gradual route for introducing key Dijkstra capabilities while maintaining the broader development schedule.
Meanwhile, Phase 2 will introduce Peras through an intra-era hard fork planned for the second quarter of 2027. The second deployment will expand the network changes established through the first phase.
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Cardano’s node infrastructure is also expanding through Amaru, an open-source implementation developed in Rust as an alternative to the Haskell node. According to Intersect, Amaru can operate as a relay while validating network activity and synchronizing with the Cardano blockchain tip. Developers are targeting November 2026 for the node to begin producing blocks on the mainnet.
Moreover, Amaru aims to provide a fully interoperable block-producing option for stake pool operators and Cardano developers. Its design emphasizes modular architecture alongside hardware requirements intended to support broader deployment options.
Node diversity could strengthen Cardano’s infrastructure by reducing its dependence on one software implementation. Additionally, multiple implementations give operators greater flexibility when selecting the infrastructure supporting their network participation.
Cardano is also adjusting its governance framework to accommodate protocol parameters introduced through Dijkstra, including those connected with Ouroboros Leios. Under Cardano’s Constitution, governance cannot modify protocol parameters unless the Constitution’s Guardrails explicitly include them. Consequently, the planned Dijkstra features require corresponding constitutional provisions before governance can manage those parameters.
Contributors intend to introduce the required parameters through one coordinated constitutional amendment instead of multiple separate proposals. This approach would establish governance coverage across Dijkstra’s planned capabilities through a unified update.
Furthermore, Intersect outlined a defined process for community participation surrounding constitutional amendments connected with Dijkstra and future network upgrades. The Constitutional Amendment Portal will support proposal discussions, submissions, and enactment, with the Civics Committee supporting the broader process.
Dijkstra represents a broader technical transition involving Cardano’s protocol architecture, node infrastructure, and governance framework. Linear Leios and Nested Transactions will anchor the first deployment, while Peras will follow through the planned 2027 hard fork. Amaru’s development also adds another node implementation as Cardano prepares its infrastructure for the Dijkstra era.
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