SIMD-0357
Alpenglow VAT
Alpenglow groundwork: the VAT implementation lands ahead of the consensus switch.
Alpenglow VAT is active on Solana mainnet since epoch 1006 — activated 3 months ago.
- mainnet
- active since epoch 1006 · 3 months ago
- testnet
- active since epoch 979 · ≈ 3 months ago
- devnet
- active since epoch 1096 · ≈ 2 months ago
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The full guideWhat breaks, what to check, and how to prepare →How we know
Solana ships protocol changes behind on-chain switches called feature gates. This page reads the switch itself about every minute — once an activation is requested, it completes at the next epoch boundary, which is where the countdown comes from. No announcements, no invented dates.