Anthropic's Dreams reorganizes an agent memory store globally but non-destructively — the input store is never modified

The problem statement, in the docs' own words: agent memory writes "are local and incremental: over many sessions a memory store accumulates duplicates, contradictions, and stale entries." The mechanism: a dream takes 1–100 past session transcripts plus one existing store and "produces a new, reorganized memory store: duplicates merged, stale or contradicted entries replaced with the latest value, and new insights surfaced." The design property that matters most for the vault's comparison: "The input store is never modified, so you can review the output and discard it if you don't like the result."

That non-destructive shape is materially different from in-place nightly edits (Ghelbur's sleeptime pass, quoted at question-consolidation-pass-vs-revisit-protocol) and from decay models (elfmem, entity-ben-emson) — it is reorganization as a reviewable artifact, structurally the same move as this vault's own never-overwrite-status-history rule, applied at whole-store scale. Beta details (Tier 1, same page): supported models claude-opus-4-8 / 4-7 / sonnet-4-6; billing at standard token rates scaling "roughly linearly" with input sessions. A "shipped May 6, 2026" date circulates in aggregators but is not on Anthropic's page — not adopted here.

Vault relevance: the field's flagship global-reorg tool builds in exactly the audit-trail property the vault's targeted approach already has; the live question of whether the vault needs the global pass at all is tracked (with first-lint evidence, currently against) at question-consolidation-pass-vs-revisit-protocol. Cost side: claim-localized-memory-maintenance-cost-advantage. moc-peer-field-agent-memory.