M3a：息壤三级记忆域——归真触发提取管线/白名单明忆/重忆确认/正影版本链/删除墓碑/双通道召回注入，退役旧记忆-抽取-反思-大周天-演化管线（迁移 004，验收 7 用例）

backend/app/models/__init__.py

@@ -25,10 +25,10 @@ from app.models.mirror_tree import (
     TreeNode,
     TreeTransplant,
 )
-from app.models.memory import Memory, MemoryLink
 from app.models.personality import PersonalityProposal, PersonalityVersion
 from app.models.rbac import Permission, Role, RolePermission, UserRole
 from app.models.runtime import Event, Run
+from app.models.xirang import FactualRecord, Memory as XirangMemory, MemoryTrigger
 from app.models.safety import AuditEvent, PendingConfirmationRecord
 from app.models.skills import Skill
 from app.models.user import User
@@ -52,9 +52,7 @@ __all__ = [
     "Lorebook",
     "LorebookEntry",
     "McpServer",
-    "Memory",
     "MemoryCandidate",
-    "MemoryLink",
     "PendingConfirmationRecord",
     "PerceptionChannel",
     "Permission",

backend/app/models/memory.py

@@ -1,46 +0,0 @@
-"""记忆模型。"""
-
-from datetime import datetime
-
-from sqlalchemy import DateTime, Float, ForeignKey, String, Text
-from sqlalchemy.orm import Mapped, mapped_column
-
-from app.core.ids import new_memory_id, new_memory_link_id
-from app.core.time import utc_now
-from app.db.base import Base
-
-
-class Memory(Base):
-    __tablename__ = "memories"
-
-    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_memory_id)
-    character_id: Mapped[str] = mapped_column(String(80), ForeignKey("characters.id"), index=True)
-    type: Mapped[str] = mapped_column(String(60), nullable=False)
-    title: Mapped[str] = mapped_column(String(200), nullable=False)
-    content: Mapped[str] = mapped_column(Text, nullable=False)
-    source: Mapped[str] = mapped_column(String(80), nullable=False, default="user_explicit")
-    confidence: Mapped[float] = mapped_column(Float, nullable=False, default=1.0)
-    importance: Mapped[float] = mapped_column(Float, nullable=False, default=0.5)
-    sensitivity: Mapped[str] = mapped_column(String(40), nullable=False, default="low")
-    evidence_ids_json: Mapped[str] = mapped_column(Text, nullable=False, default="[]")
-    status: Mapped[str] = mapped_column(String(40), nullable=False, default="active", index=True)
-    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)
-    updated_at: Mapped[datetime] = mapped_column(
-        DateTime(timezone=True), default=utc_now, onupdate=utc_now
-    )
-    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
-    expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
-    temporal_context_json: Mapped[str] = mapped_column(
-        Text, nullable=False, default="{}", server_default="{}"
-    )
-
-
-class MemoryLink(Base):
-    __tablename__ = "memory_links"
-
-    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_memory_link_id)
-    character_id: Mapped[str] = mapped_column(String(80), ForeignKey("characters.id"), index=True)
-    source_memory_id: Mapped[str] = mapped_column(String(80), ForeignKey("memories.id"), index=True)
-    target_memory_id: Mapped[str] = mapped_column(String(80), ForeignKey("memories.id"), index=True)
-    relation: Mapped[str] = mapped_column(String(80), nullable=False)
-    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)

backend/app/models/xirang.py

@@ -0,0 +1,80 @@
+"""息壤（记忆域）模型（data-model.md §3）。
+
+- 三级：微痕 trace（短期）/ 明忆 explicit（低敏长期）/ 重忆 sensitive（须确认）；
+- 双源：user_explicit / self_inferred；
+- 版本链：正影=新行 prev_version_id 指旧行，旧行 superseded 停止普通召回，内容不改写；
+- 删除：tombstoned 墓碑不承载原文，主存储/检索/上下文全链路停用。
+"""
+
+from datetime import datetime
+
+from sqlalchemy import DateTime, Float, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.ids import new_factual_record_id, new_memory_id, new_memory_trigger_id
+from app.core.time import utc_now
+from app.db.base import Base
+
+
+class Memory(Base):
+    """统一记忆表：三级 × 类型 × 状态 × 双源（契约词典 §10）。"""
+
+    __tablename__ = "memories"
+
+    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_memory_id)
+    character_id: Mapped[str] = mapped_column(String(80), index=True, nullable=False)
+    # trace / explicit / sensitive（§10.1）
+    tier: Mapped[str] = mapped_column(String(20), nullable=False, index=True)
+    # persona / episodic / instruction / relationship_view / fact_candidate（§10.2）
+    type: Mapped[str] = mapped_column(String(40), nullable=False, index=True)
+    # candidate / pending / active / superseded / tombstoned（§10.3）
+    status: Mapped[str] = mapped_column(String(20), nullable=False, default="candidate", index=True)
+    # user_explicit / self_inferred（§10.4）
+    source: Mapped[str] = mapped_column(String(20), nullable=False, default="self_inferred")
+    content: Mapped[str] = mapped_column(Text, nullable=False)
+    # 可解释性：指向镜树节点/事件（撤销与来源展开的依据）
+    source_refs_json: Mapped[str] = mapped_column(Text, nullable=False, default="[]")
+    sensitivity: Mapped[str] = mapped_column(String(20), nullable=False, default="none")
+    priority: Mapped[int] = mapped_column(Integer, nullable=False, default=50)
+    confidence: Mapped[float] = mapped_column(Float, nullable=False, default=0.5)
+    # 活力值：2^(-Δdays/半衰期) 衰减、命中强化（§6.2）
+    vitality: Mapped[float] = mapped_column(Float, nullable=False, default=1.0)
+    # 微痕有效期；空表示不过期
+    valid_until: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    # 记忆界域：境界记忆不进真界上下文（§5）
+    realm: Mapped[str] = mapped_column(String(40), nullable=False, default="reality")
+    prev_version_id: Mapped[str | None] = mapped_column(String(80), index=True)
+    # 召回统计（召回透明）
+    recall_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
+    last_recalled_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=utc_now, onupdate=utc_now
+    )
+
+
+class MemoryTrigger(Base):
+    """记忆触发条件：keyword（微痕激活管线共用）与 disclosure（单一触发）。"""
+
+    __tablename__ = "memory_triggers"
+
+    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_memory_trigger_id)
+    memory_id: Mapped[str] = mapped_column(String(80), ForeignKey("memories.id"), index=True)
+    # keyword / disclosure / vector（§10.5）
+    kind: Mapped[str] = mapped_column(String(20), nullable=False)
+    pattern: Mapped[str] = mapped_column(String(200), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)
+
+
+class FactualRecord(Base):
+    """实录（不可变）：发生了什么 + 证据引用；与心痕（relationship_view）分离。"""
+
+    __tablename__ = "factual_records"
+
+    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_factual_record_id)
+    character_id: Mapped[str] = mapped_column(String(80), index=True, nullable=False)
+    canonization_id: Mapped[str] = mapped_column(String(80), index=True)
+    # 证据：路径节点引用 + 摘要
+    evidence_json: Mapped[str] = mapped_column(Text, nullable=False, default="{}")
+    summary: Mapped[str] = mapped_column(Text, nullable=False, default="")
+    occurred_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)