Corrected from 'three-tier' to 'two-tier' model:
- Town level: persistent (.beads/) + ephemeral (.beads-wisp/)
- Rig level: persistent (.beads/) + ephemeral (.beads-wisp/)
Each tier has both durable and wisp storage, not three separate tiers.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>