Solana Changelog: September 10, 2026

What happened

V1 transaction activation is delayed to Epoch 1035, alongside new Agave, Firedancer, Web3.js, Solana Kit, and program releases. An improvement to the leader handover procedure in Alpenglow was proposed WTM - This improvement ensures that leader nodes actually fit the 200ms slot time.

Major Network Announcement: Please check your applications to see if they support V1 transactions: https://solana.com/upgrades/larger-transaction-sizes The network has decided to delay activation to Epoch 1035 to give more time for users to prepare. WTM - In production, connections should have an abort handle in case there are issues where only a connection restart would resolve them.

In this case, when the TLS certificate expires, an abort and renewal is necessary. Agave made several performance improvements to its gossip implementation WTM - Gossip was one of the performance bottlenecks identified in Agave early on.