feat(memory): add Deep Dream module for daily memory distillation

- Add Deep Dream: nightly distill daily memories → refined MEMORY.md + dream diary
- Simplify flush prompt to daily-only, defer MEMORY.md maintenance to Deep Dream
- Remove dead code (_append_to_main_memory) and fix fallback summary logic
- Add shrinkage protection and input dedup for dream process
- Ensure flush threads complete before dream starts
- Update docs (zh/en/ja) with dream diary and distillation mechanism

agent/memory/summarizer.py

@@ -1,13 +1,12 @@
 """
-Memory flush manager (with Light Dream)
+Memory flush manager with Deep Dream distillation
 
 Handles memory persistence when conversation context is trimmed or overflows:
-- Uses LLM to summarize discarded messages into concise key-information entries
+- Uses LLM to summarize discarded messages into concise daily records
 - Writes to daily memory files (lazy creation)
-- Light Dream: extracts long-term memories to MEMORY.md in the same LLM call
 - Deduplicates trim flushes to avoid repeated writes
 - Runs summarization asynchronously to avoid blocking normal replies
-- Provides daily summary interface for scheduler
+- Deep Dream: periodically distills daily memories → refined MEMORY.md + dream diary
 """
 
 import threading
@@ -17,43 +16,76 @@ from datetime import datetime
 from common.log import logger
 
 
-SUMMARIZE_SYSTEM_PROMPT = """你是一个记忆提取助手。你的任务是从对话记录中提炼出两种记忆：
+SUMMARIZE_SYSTEM_PROMPT = """你是一个对话记录助手。请将对话内容归纳为当天的日常记录。
 
-## 第一部分：日常记录（[DAILY]）
+## 要求
 
-按「事件」维度归纳当天发生的事，不要按对话轮次逐条记录：
+按「事件」维度归纳发生的事，不要按对话轮次逐条记录：
 - 每条一行，用 "- " 开头
 - 合并同一件事的多轮对话
 - 只记录有意义的事件，忽略闲聊和问候
+- 保留关键的决策、结论和待办事项
 
-## 第二部分：长期记忆（[MEMORY]）
+当对话没有任何记录价值（仅含问候或无意义内容），直接回复"无"。"""
 
-提取值得**永久记住**的关键信息，这些信息在未来的对话中仍然有价值：
-- 用户的偏好、习惯、风格
-- 重要的决策或约定
-- 关键人物关系
-- 用户明确要求记住的内容
-- 重要的教训或经验总结
+SUMMARIZE_USER_PROMPT = """请归纳以下对话的日常记录：
 
-**如果没有值得永久记住的信息，[MEMORY] 部分留空即可。**
+{conversation}"""
+
+# ---------------------------------------------------------------------------
+# Deep Dream prompts — distill daily memories → MEMORY.md + dream diary
+# ---------------------------------------------------------------------------
+
+DREAM_SYSTEM_PROMPT = """你是一个记忆整理助手，负责定期整理用户的长期记忆。
+
+你将收到两份材料：
+1. **当前长期记忆** — MEMORY.md 的全部现有内容
+2. **今日日记** — 当天的日常记录
+
+MEMORY.md 会注入每次对话的系统提示词中，因此必须保持精炼。
+
+**重要：只能基于提供的材料进行整理，严禁编造、推测或添加材料中不存在的信息。**
+
+## 任务
+
+### Part 1: 更新后的长期记忆（[MEMORY]）
+
+在现有记忆基础上进行整理和提炼，输出完整的更新后内容：
+- **合并提炼**：将含义相近的多条合并为一条高密度表述，而非简单罗列
+- **新增萃取**：从今日日记中提取值得永久记住的新信息（偏好、决策、人物、经验）
+- **冲突更新**：当新信息与旧条目矛盾时，以新信息为准，替换旧条目
+- **清理无效**：删除临时性记录、空白条目、格式残留等
+- **删除冗余**：已被更精炼表述涵盖的旧条目应删除，避免信息重复
+- 每条一行，用 "- " 开头，不带日期前缀
+- 目标：控制在 30 条以内，每条尽量一句话概括
+
+### Part 2: 梦境日记（[DREAM]）
+
+用简洁的叙事风格写一篇短日记，记录这次整理的发现，保持格式美观易读：
+- 发现了哪些重复或矛盾
+- 从日记中提取了什么新洞察
+- 做了哪些清理和优化
+- 整体感受和观察
 
 ## 输出格式（严格遵守）
 
 ```
-[DAILY]
-- 事件1的摘要
-- 事件2的摘要
-
 [MEMORY]
-- 值得永久记住的信息1
-- 值得永久记住的信息2
-```
+- 记忆条目1
+- 记忆条目2
+...
 
-当对话没有任何记录价值（仅含问候或无意义内容），直接回复"无"。"""
+[DREAM]
+梦境日记内容...
+```"""
 
-SUMMARIZE_USER_PROMPT = """请从以下对话记录中提取记忆（按 [DAILY] 和 [MEMORY] 两部分输出）：
+DREAM_USER_PROMPT = """## 当前长期记忆（MEMORY.md）
 
-{conversation}"""
+{memory_content}
+
+## 近期日记（最近 {days} 天）
+
+{daily_content}"""
 
 
 
@@ -82,6 +114,8 @@ class MemoryFlushManager:
         self.last_flush_timestamp: Optional[datetime] = None
         self._trim_flushed_hashes: set = set()  # Content hashes of already-flushed messages
         self._last_flushed_content_hash: str = ""  # Content hash at last flush, for daily dedup
+        self._last_dream_input_hash: str = ""  # Hash of dream input, for dedup
+        self._last_flush_thread: Optional[threading.Thread] = None
     
     def get_today_memory_file(self, user_id: Optional[str] = None, ensure_exists: bool = False) -> Path:
         """Get today's memory file path: memory/YYYY-MM-DD.md"""
@@ -162,6 +196,7 @@ class MemoryFlushManager:
             )
             thread.start()
             logger.info(f"[MemoryFlush] Async flush dispatched (reason={reason}, msgs={len(snapshot)})")
+            self._last_flush_thread = thread
             return True
 
         except Exception as e:
@@ -176,45 +211,35 @@ class MemoryFlushManager:
         max_messages: int,
         context_summary_callback: Optional[Callable[[str], None]] = None,
     ):
-        """Background worker: summarize with LLM, write daily file + MEMORY.md (Light Dream)."""
+        """Background worker: summarize with LLM, write daily memory file."""
         try:
             raw_summary = self._summarize_messages(messages, max_messages)
             if not raw_summary or not raw_summary.strip() or raw_summary.strip() == "无":
                 logger.info(f"[MemoryFlush] No valuable content to flush (reason={reason})")
                 return
 
-            daily_part, memory_part = self._parse_dual_output(raw_summary)
+            # Strip legacy [DAILY]/[MEMORY] markers if model still outputs them
+            daily_part = self._clean_summary_output(raw_summary)
+            if not daily_part:
+                return
 
             # --- Write daily memory ---
-            if daily_part:
-                daily_file = ensure_daily_memory_file(self.workspace_dir, user_id)
+            daily_file = ensure_daily_memory_file(self.workspace_dir, user_id)
 
-                if reason == "overflow":
-                    header = f"## Context Overflow Recovery ({datetime.now().strftime('%H:%M')})"
-                    note = "The following conversation was trimmed due to context overflow:\n"
-                elif reason == "trim":
-                    header = f"## Trimmed Context ({datetime.now().strftime('%H:%M')})"
-                    note = ""
-                elif reason == "daily_summary":
-                    header = f"## Daily Summary ({datetime.now().strftime('%H:%M')})"
-                    note = ""
-                else:
-                    header = f"## Session Notes ({datetime.now().strftime('%H:%M')})"
-                    note = ""
+            headers = {
+                "overflow": f"## Context Overflow Recovery ({datetime.now().strftime('%H:%M')})",
+                "trim": f"## Trimmed Context ({datetime.now().strftime('%H:%M')})",
+                "daily_summary": f"## Daily Summary ({datetime.now().strftime('%H:%M')})",
+            }
+            header = headers.get(reason, f"## Session Notes ({datetime.now().strftime('%H:%M')})")
 
-                flush_entry = f"\n{header}\n\n{note}{daily_part}\n"
+            with open(daily_file, "a", encoding="utf-8") as f:
+                f.write(f"\n{header}\n\n{daily_part}\n")
 
-                with open(daily_file, "a", encoding="utf-8") as f:
-                    f.write(flush_entry)
-
-                logger.info(f"[MemoryFlush] Wrote daily memory to {daily_file.name} (reason={reason}, chars={len(daily_part)})")
-
-            # --- Light Dream: write long-term memory to MEMORY.md ---
-            if memory_part:
-                self._append_to_main_memory(memory_part, user_id)
+            logger.info(f"[MemoryFlush] Wrote daily memory to {daily_file.name} (reason={reason}, chars={len(daily_part)})")
 
             # --- Inject context summary into live messages (if callback provided) ---
-            if context_summary_callback and daily_part:
+            if context_summary_callback:
                 try:
                     context_summary_callback(daily_part)
                 except Exception as e:
@@ -226,67 +251,26 @@ class MemoryFlushManager:
             logger.warning(f"[MemoryFlush] Async flush failed (reason={reason}): {e}")
 
     @staticmethod
-    def _parse_dual_output(raw: str) -> tuple:
-        """
-        Parse LLM output into (daily_part, memory_part).
-        Handles both new [DAILY]/[MEMORY] format and legacy single-section format.
-        """
+    def _clean_summary_output(raw: str) -> str:
+        """Strip legacy [DAILY]/[MEMORY] markers if present, return clean daily text."""
         raw = raw.strip()
+        if not raw or raw == "无":
+            return ""
 
-        if "[DAILY]" in raw or "[MEMORY]" in raw:
-            daily_part = ""
-            memory_part = ""
+        # Strip [DAILY] marker
+        if "[DAILY]" in raw:
+            start = raw.index("[DAILY]") + len("[DAILY]")
+            end = raw.index("[MEMORY]") if "[MEMORY]" in raw else len(raw)
+            raw = raw[start:end].strip()
 
-            # Extract [DAILY] section
-            if "[DAILY]" in raw:
-                start = raw.index("[DAILY]") + len("[DAILY]")
-                end = raw.index("[MEMORY]") if "[MEMORY]" in raw else len(raw)
-                daily_part = raw[start:end].strip()
+        # Remove stray [MEMORY] section entirely
+        if "[MEMORY]" in raw:
+            raw = raw[:raw.index("[MEMORY]")].strip()
 
-            # Extract [MEMORY] section
-            if "[MEMORY]" in raw:
-                start = raw.index("[MEMORY]") + len("[MEMORY]")
-                memory_part = raw[start:].strip()
+        # Remove markdown code fences
+        raw = raw.replace("```", "").strip()
 
-            # Filter out empty markers
-            if memory_part and all(
-                not line.strip() or line.strip() == "-"
-                for line in memory_part.split("\n")
-            ):
-                memory_part = ""
-
-            return daily_part, memory_part
-
-        # Legacy format: treat entire output as daily, no memory extraction
-        return raw, ""
-
-    def _append_to_main_memory(self, memory_entries: str, user_id: Optional[str] = None):
-        """Append extracted long-term memories to MEMORY.md with date stamp."""
-        try:
-            main_file = self.get_main_memory_file(user_id)
-            today = datetime.now().strftime("%Y-%m-%d")
-
-            # Add date prefix to each entry line
-            stamped_lines = []
-            for line in memory_entries.strip().split("\n"):
-                line = line.strip()
-                if line.startswith("- "):
-                    stamped_lines.append(f"- ({today}) {line[2:]}")
-                elif line:
-                    stamped_lines.append(f"- ({today}) {line}")
-
-            if not stamped_lines:
-                return
-
-            stamped_text = "\n".join(stamped_lines)
-
-            with open(main_file, "a", encoding="utf-8") as f:
-                f.write(f"\n{stamped_text}\n")
-
-            logger.info(f"[LightDream] Appended {len(stamped_lines)} entries to MEMORY.md")
-
-        except Exception as e:
-            logger.warning(f"[LightDream] Failed to append to MEMORY.md: {e}")
+        return raw
 
     def create_daily_summary(
         self,
@@ -313,12 +297,195 @@ class MemoryFlushManager:
             reason="daily_summary",
             max_messages=0,
         )
-    
+
+    # ---- Deep Dream (memory distillation) ----
+
+    def deep_dream(self, user_id: Optional[str] = None, lookback_days: int = 1) -> bool:
+        """
+        Distill recent daily memories into MEMORY.md and generate a dream diary.
+
+        Process:
+        1. Read current MEMORY.md + recent N days of daily files
+        2. LLM produces updated MEMORY.md (deduped/pruned) + dream diary narrative
+        3. Overwrite MEMORY.md with the distilled version
+        4. Write dream diary to memory/dreams/YYYY-MM-DD.md
+        """
+        if not self.llm_model:
+            logger.warning("[DeepDream] No LLM model available, skipping")
+            return False
+
+        logger.info(f"[DeepDream] Starting memory distillation (lookback={lookback_days} days)")
+
+        # Collect materials
+        memory_content = self._read_main_memory(user_id)
+        daily_content, has_content = self._read_recent_dailies(user_id, lookback_days)
+
+        if not has_content:
+            logger.info("[DeepDream] No recent daily records, skipping to preserve existing MEMORY.md")
+            return False
+
+        # Dedup: skip if input materials haven't changed since last dream
+        import hashlib
+        input_hash = hashlib.md5((memory_content + daily_content).encode("utf-8")).hexdigest()
+        if input_hash == self._last_dream_input_hash:
+            logger.debug("[DeepDream] Input unchanged since last dream, skipping")
+            return False
+        self._last_dream_input_hash = input_hash
+
+        logger.info(
+            f"[DeepDream] Materials collected: "
+            f"MEMORY.md={len(memory_content)} chars, "
+            f"daily={len(daily_content)} chars"
+        )
+
+        # Call LLM for distillation
+        import time as _time
+        t0 = _time.monotonic()
+        try:
+            user_msg = DREAM_USER_PROMPT.format(
+                memory_content=memory_content or "(empty)",
+                days=lookback_days,
+                daily_content=daily_content or "(no recent daily records)",
+            )
+            from agent.protocol.models import LLMRequest
+            # Scale max_tokens based on input size to avoid truncating large MEMORY.md
+            input_chars = len(memory_content) + len(daily_content)
+            dream_max_tokens = max(2000, min(input_chars, 8000))
+            request = LLMRequest(
+                messages=[{"role": "user", "content": user_msg}],
+                temperature=0.3,
+                max_tokens=dream_max_tokens,
+                stream=False,
+                system=DREAM_SYSTEM_PROMPT,
+            )
+            response = self.llm_model.call(request)
+            raw = self._extract_response_text(response)
+            elapsed = _time.monotonic() - t0
+            if not raw or not raw.strip():
+                logger.warning(f"[DeepDream] LLM returned empty response ({elapsed:.1f}s)")
+                return False
+            logger.info(f"[DeepDream] LLM distillation completed ({elapsed:.1f}s, {len(raw)} chars)")
+        except Exception as e:
+            elapsed = _time.monotonic() - t0
+            logger.warning(f"[DeepDream] LLM call failed ({elapsed:.1f}s): {e}")
+            return False
+
+        # Parse [MEMORY] and [DREAM] sections
+        new_memory, dream_diary = self._parse_dream_output(raw)
+
+        if not new_memory:
+            logger.warning("[DeepDream] No [MEMORY] section in LLM output, skipping overwrite")
+            return False
+
+        # Overwrite MEMORY.md (with shrinkage protection)
+        try:
+            main_file = self.get_main_memory_file(user_id)
+            old_size = len(memory_content)
+            if old_size > 200 and len(new_memory) < old_size * 0.3:
+                logger.warning(
+                    f"[DeepDream] Distilled MEMORY.md is too small "
+                    f"({old_size} → {len(new_memory)} chars, <30%), aborting to prevent data loss"
+                )
+                return False
+            main_file.write_text(new_memory + "\n", encoding="utf-8")
+            logger.info(
+                f"[DeepDream] Updated MEMORY.md "
+                f"({old_size} → {len(new_memory)} chars)"
+            )
+        except Exception as e:
+            logger.warning(f"[DeepDream] Failed to write MEMORY.md: {e}")
+            return False
+
+        # Write dream diary
+        if dream_diary:
+            try:
+                self._write_dream_diary(dream_diary, user_id)
+            except Exception as e:
+                logger.warning(f"[DeepDream] Failed to write dream diary: {e}")
+
+        logger.info("[DeepDream] ✅ Deep Dream completed successfully")
+        return True
+
+    def _read_main_memory(self, user_id: Optional[str] = None) -> str:
+        """Read current MEMORY.md content."""
+        main_file = self.get_main_memory_file(user_id)
+        if main_file.exists():
+            return main_file.read_text(encoding="utf-8").strip()
+        return ""
+
+    def _read_recent_dailies(
+        self, user_id: Optional[str] = None, lookback_days: int = 1
+    ) -> tuple:
+        """
+        Read recent daily memory files.
+
+        Returns:
+            (combined_text, has_content) tuple
+        """
+        from datetime import timedelta
+
+        parts = []
+        has_content = False
+        today = datetime.now().date()
+
+        for offset in range(lookback_days):
+            day = today - timedelta(days=offset)
+            date_str = day.strftime("%Y-%m-%d")
+            if user_id:
+                daily_file = self.memory_dir / "users" / user_id / f"{date_str}.md"
+            else:
+                daily_file = self.memory_dir / f"{date_str}.md"
+
+            if daily_file.exists():
+                content = daily_file.read_text(encoding="utf-8").strip()
+                if content:
+                    parts.append(f"### {date_str}\n\n{content}")
+                    has_content = True
+            else:
+                parts.append(f"### {date_str}\n\n(no records)")
+
+        return "\n\n".join(parts), has_content
+
+    @staticmethod
+    def _parse_dream_output(raw: str) -> tuple:
+        """Parse LLM output into (new_memory, dream_diary)."""
+        raw = raw.strip().replace("```", "")
+        new_memory = ""
+        dream_diary = ""
+
+        if "[MEMORY]" in raw:
+            start = raw.index("[MEMORY]") + len("[MEMORY]")
+            end = raw.index("[DREAM]") if "[DREAM]" in raw else len(raw)
+            new_memory = raw[start:end].strip()
+
+        if "[DREAM]" in raw:
+            start = raw.index("[DREAM]") + len("[DREAM]")
+            dream_diary = raw[start:].strip()
+
+        return new_memory, dream_diary
+
+    def _write_dream_diary(self, content: str, user_id: Optional[str] = None):
+        """Write dream diary to memory/dreams/YYYY-MM-DD.md."""
+        dreams_dir = self.memory_dir / "dreams"
+        if user_id:
+            dreams_dir = self.memory_dir / "users" / user_id / "dreams"
+        dreams_dir.mkdir(parents=True, exist_ok=True)
+
+        today = datetime.now().strftime("%Y-%m-%d")
+        diary_file = dreams_dir / f"{today}.md"
+        diary_file.write_text(
+            f"# Dream Diary: {today}\n\n{content}\n",
+            encoding="utf-8",
+        )
+        logger.info(f"[DeepDream] Wrote dream diary to {diary_file}")
+
     # ---- Internal helpers ----
     
     def _summarize_messages(self, messages: List[Dict], max_messages: int = 0) -> str:
         """
-        Summarize conversation messages using LLM, with rule-based fallback.
+        Summarize conversation messages using LLM.
+        Returns empty string if LLM deems content not worth recording.
+        Rule-based fallback only used when LLM call raises an exception.
         """
         conversation_text = self._format_conversation_for_summary(messages, max_messages)
         if not conversation_text.strip():
@@ -329,13 +496,14 @@ class MemoryFlushManager:
                 summary = self._call_llm_for_summary(conversation_text)
                 if summary and summary.strip() and summary.strip() != "无":
                     return summary.strip()
-                logger.info(f"[MemoryFlush] LLM returned empty or '无', using fallback")
+                logger.info("[MemoryFlush] LLM returned empty or '无', skipping write")
+                return ""
             except Exception as e:
                 logger.warning(f"[MemoryFlush] LLM summarization failed, using fallback: {e}")
+                return self._extract_summary_fallback(messages, max_messages)
         else:
             logger.info("[MemoryFlush] No LLM model available, using rule-based fallback")
-        
-        return self._extract_summary_fallback(messages, max_messages)
+            return self._extract_summary_fallback(messages, max_messages)
 
     def _format_conversation_for_summary(self, messages: List[Dict], max_messages: int = 0) -> str:
         """Format messages into readable conversation text for LLM summarization."""

bridge/agent_initializer.py

@@ -567,7 +567,7 @@ class AgentInitializer:
         t.start()
 
     def _flush_all_agents(self):
-        """Flush memory for all active agent sessions."""
+        """Flush memory for all active agent sessions, then run Deep Dream."""
         agents = []
         if self.agent_bridge.default_agent:
             agents.append(("default", self.agent_bridge.default_agent))
@@ -577,7 +577,10 @@ class AgentInitializer:
         if not agents:
             return
 
+        # Phase 1: flush daily summaries
         flushed = 0
+        flush_threads = []
+        dream_candidate = None
         for label, agent in agents:
             try:
                 if not agent.memory_manager:
@@ -589,8 +592,26 @@ class AgentInitializer:
                 result = agent.memory_manager.flush_manager.create_daily_summary(messages)
                 if result:
                     flushed += 1
+                    t = agent.memory_manager.flush_manager._last_flush_thread
+                    if t:
+                        flush_threads.append(t)
+                if dream_candidate is None:
+                    dream_candidate = agent.memory_manager.flush_manager
             except Exception as e:
                 logger.warning(f"[DailyFlush] Failed for session {label}: {e}")
 
         if flushed:
             logger.info(f"[DailyFlush] Flushed {flushed}/{len(agents)} agent session(s)")
+
+        # Wait for all flush threads to finish before dreaming
+        for t in flush_threads:
+            t.join(timeout=60)
+
+        # Phase 2: Deep Dream — distill daily memories → MEMORY.md + dream diary
+        if dream_candidate:
+            try:
+                result = dream_candidate.deep_dream()
+                if result:
+                    logger.info("[DeepDream] Memory distillation completed successfully")
+            except Exception as e:
+                logger.warning(f"[DeepDream] Failed: {e}")

docs/en/memory/index.mdx

@@ -15,12 +15,17 @@ Stored in `~/cow/MEMORY.md`, containing long-term user preferences, important de
 
 Stored in `~/cow/memory/` directory, named by date (e.g., `2026-03-08.md`), recording daily conversation summaries and key events. Files are only created on first write to avoid generating empty files.
 
+### Dream Diary (memory/dreams/YYYY-MM-DD.md)
+
+A byproduct of the Deep Dream (memory distillation) process, recording discoveries, deduplication operations, and new insights from each consolidation. Stored in `~/cow/memory/dreams/` directory, named by date.
+
 ## Automatic Writing
 
 The Agent automatically persists conversation content to long-term memory through the following mechanisms:
 
 - **On context trimming** — When conversation turns or tokens exceed the configured limit, the oldest half of the context is trimmed, and the discarded content is summarized by LLM into key information and written to the daily memory file. The summary is also asynchronously injected into the retained context for conversational continuity
 - **Daily scheduled summary** — A full summary is automatically triggered at 23:55 every day, ensuring memory is preserved even on low-activity days (skipped if content hasn't changed)
+- **Deep Dream (memory distillation)** — Runs automatically after the daily summary, reading recent daily files and current MEMORY.md, then using LLM to deduplicate, merge, and prune, producing a refined MEMORY.md and a dream diary
 - **On API context overflow** — When the model API returns a context overflow error, the current conversation summary is saved as an emergency measure
 
 All memory writes run asynchronously in a background thread (LLM summarization + file writing), never blocking normal conversation replies.
@@ -44,6 +49,7 @@ On first launch, the Agent will proactively ask the user for key information and
 | `user.md` | User identity information and preferences |
 | `MEMORY.md` | Core memory (long-term) |
 | `memory/YYYY-MM-DD.md` | Daily memory (created on demand) |
+| `memory/dreams/YYYY-MM-DD.md` | Dream diary (auto-generated by Deep Dream) |
 
 <Frame>
   <img src="https://cdn.link-ai.tech/doc/20260203000455.png" width="800" />

docs/ja/memory/index.mdx

@@ -15,12 +15,17 @@ description: CowAgent の長期記憶システム — ファイル永続化、
 
 `~/cow/memory/` ディレクトリに保存され、日付で命名されます（例：`2026-03-08.md`）。日々の会話の要約と主要なイベントを記録します。空ファイルの生成を避けるため、最初の書き込み時にのみファイルが作成されます。
 
+### 夢日記（memory/dreams/YYYY-MM-DD.md）
+
+Deep Dream（記憶蒸留）プロセスの副産物で、各整理で発見された重複、統合操作、新しい洞察を記録します。`~/cow/memory/dreams/` ディレクトリに日付で命名されて保存されます。
+
 ## 自動書き込み
 
 Agent は以下のメカニズムにより、会話内容を長期記憶に自動的に永続化します：
 
 - **コンテキストトリミング時** — 会話ターン数またはトークン数が設定上限を超えた場合、最も古い半分のコンテキストがトリミングされ、LLM によって要約されて日次記憶ファイルに書き込まれます。要約は保持されたコンテキストにも非同期で注入され、会話の連続性を維持します
 - **毎日のスケジュール要約** — 毎日 23:55 に自動的にフル要約がトリガーされ、アクティビティが少ない日でも記憶が保存されます（内容が変更されていない場合はスキップ）
+- **Deep Dream（記憶蒸留）** — 毎日の要約完了後に自動実行され、最近の日次記憶と現在の MEMORY.md を読み込み、LLM で重複排除・統合・剪定を行い、精錬された新しい MEMORY.md と夢日記を生成します
 - **API コンテキストオーバーフロー時** — モデル API がコンテキストオーバーフローエラーを返した場合、緊急措置として現在の会話要約が保存されます
 
 すべての記憶書き込みはバックグラウンドスレッドで非同期に実行され（LLM の要約 + ファイル書き込み）、通常の会話応答をブロックしません。
@@ -35,6 +40,7 @@ Agent は以下のメカニズムにより、会話内容を長期記憶に自
 | `user.md` | ユーザーの身元情報と好み |
 | `MEMORY.md` | コア記憶（長期） |
 | `memory/YYYY-MM-DD.md` | 日次記憶（オンデマンドで作成） |
+| `memory/dreams/YYYY-MM-DD.md` | 夢日記（Deep Dream で自動生成） |
 
 <Frame>
   <img src="https://cdn.link-ai.tech/doc/20260203000455.png" width="800" />

docs/memory/index.mdx

@@ -15,12 +15,17 @@ description: CowAgent 的长期记忆系统 — 文件持久化、自动写入
 
 存储在 `~/cow/memory/` 目录下，按日期命名（如 `2026-03-08.md`），记录每天的对话摘要和关键事件。仅在首次写入时创建，避免生成空文件。
 
+### 梦境日记（memory/dreams/YYYY-MM-DD.md）
+
+Deep Dream（记忆蒸馏）过程的副产物，记录每次整理的发现、去重合并操作和新洞察。存储在 `~/cow/memory/dreams/` 目录下，按日期命名。
+
 ## 自动写入
 
 Agent 通过以下机制自动将对话内容持久化为长期记忆：
 
 - **上下文裁剪时** — 当对话轮次或 token 超出配置上限时，裁剪最早一半的上下文，使用 LLM 将被裁剪的内容总结为关键信息写入当天记忆文件，并将摘要异步注入到保留的上下文中，帮助模型保持对话连贯性
 - **每日定时总结** — 每天 23:55 自动触发一次全量总结，防止低活跃日无记忆留存（内容无变化时自动跳过）
+- **Deep Dream（记忆蒸馏）** — 每日总结完成后自动执行，读取近期日记和当前 MEMORY.md，通过 LLM 进行去重、合并、修剪，生成精炼的新版 MEMORY.md 并输出梦境日记
 - **API 上下文溢出时** — 当模型 API 返回上下文溢出错误时，紧急保存当前对话摘要
 
 所有记忆写入均在后台异步执行（LLM 总结 + 文件写入），不阻塞正常对话回复。
@@ -44,6 +49,7 @@ Agent 会在对话中根据需要自动触发记忆检索，将相关历史信
 | `user.md` | 用户身份信息和偏好 |
 | `MEMORY.md` | 核心记忆（长期） |
 | `memory/YYYY-MM-DD.md` | 日级记忆（按需创建） |
+| `memory/dreams/YYYY-MM-DD.md` | 梦境日记（Deep Dream 自动生成） |
 
 <Frame>
   <img src="https://cdn.link-ai.tech/doc/20260203000455.png" width="800" />