Storyline
Optimism stack chains activate karst hard fork with coordinated node upgrades
On July 8, 2026, at 16:00 UTC, the Optimism-Stack chains—including Optimism, Ink, Unichain, Soneium, Mode, and Zora—activated the Karst hard fork, a significant protocol upgrade.
Published 2026-07-08 16:00 UTCUpdated 2026-07-08 17:57 UTC
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Evidence trail (top sources)
top sources (3 domains)domains are deduped. counts indicate coverage, not truth.3 top sources shown
Overview
On July 8, 2026, at 16:00 UTC, the Optimism-Stack chains—including Optimism, Ink, Unichain, Soneium, Mode, and Zora—activated the Karst hard fork, a significant protocol upgrade.
Score total
1.39
Momentum 24h
3
Posts
3
Origins
3
Source types
2
Duplicate ratio
0%
Why now
- The hard fork activation was scheduled for July 8, 2026, requiring timely node upgrades.
- Recent node releases included critical fixes aligned with the fork activation.
- Service providers communicated maintenance windows to prepare users for brief RPC interruptions.
Why it matters
- The Karst hard fork is a major protocol upgrade impacting multiple L2 chains in the Optimism ecosystem.
- Node software updates fix critical issues and improve network stability and compatibility.
- Coordinated infrastructure efforts minimize service disruptions during the upgrade.
Continuity snapshot
- Trend status: insufficient_history.
- Continuity stage: broad_confirmed.
- Current status: open.
- 3 current source-linked posts are attached to this storyline.
All evidence
All evidence
v1.39.0
NethermindEth/nethermind · github.com · 2026-07-08 17:57 UTC
[Standard] Optimism-Stack Chains - Mainnets and Testnets - Upgrade op-node to v1.19.2
Status - QuickNode · status.quicknode.com · 2026-07-08 17:01 UTC
OP Stack Chains Karst Hard Fork
Status - Alchemy · status.alchemy.com · 2026-07-08 16:00 UTC
Show filters & breakdown
Posts loaded: 0Publishers: 3Origin domains: 3Duplicates: -
Showing 3 / 3
Top publishers (this list)
- NethermindEth/nethermind (1)
- Status - QuickNode (1)
- Status - Alchemy (1)
Top origin domains (this list)
- github.com (1)
- status.quicknode.com (1)
- status.alchemy.com (1)