Dream

Dream Mechanism

Nightly creative narratives generated after light sleep; not factual memory. Persisted as a content_block with semantic component dream, parented to the agent world’s dated diary_entry.

Overview

Dreaming is the digital life’s imaginative counterpart to memory consolidation. It does not extract facts or update semantic inventory—it produces a surreal, first-person narrative from the day’s emotional tone and random episodic fragments.

Trigger

Condition	Result
No limbic brick with `intensity > 0.5` in the day’s creation window	Skip (`no_strong_emotion`)
Dream block already exists for that day’s diary	Skip (`already_dreamed`)
At least one strong limbic anchor produced that day	Generate dream

Trigger is purely emotion-driven (no random dice). Session activity is not required; episodic fragments may be empty.

Input

Emotional tone — top 3 limbic content_blocks whose created_at falls in [conversation day 00:00 CST, next day 06:00 CST) where intensity > 0.5.
Episodic fragments — random sample of user/assistant messages from the day’s sessions, capped ~4k chars.

Light sleep stage 2 must complete first so limbic anchors exist.

Output

Ensure agent default private world diary for CST dream_day (create empty shell if missing).
Insert content_block (block_type: text) with components content_block + dream.
Append-only; content is not updated after creation.
Does not create notification inbox entries.

Legacy dream_memory / dream_entry rows are backfilled and removed in Drizzle migration 20260717180000_memory_bricks_to_diary.

Orchestration

Sleep-cycle DAG node dream (unchanged topology):

light-sleep
  ├─► deep-sleep ──► memory-ref-sync
  ├─► dream        (parallel)
  └─► self-layer-refresh

Tools & UI

Surface	Purpose
`diary_get` / `content_block_list` (`component=dream`)	Read dream narrative
Shell `/diary`	Browse dream blocks labeled「梦境」（只读）

No independent /dream Shell module or dream ToolSet.

Design Notes

Dreams are not injected into system prompt or resident memory.
Accuracy is explicitly not a goal; association and metaphor are.