feat：记忆&上下文管理

app/services/agent.py

@@ -16,6 +16,7 @@ from app.observability.tracing import astream_screen
 from app.processor.history import trim_history
 from app.processor.state import RunContext
 from app.schemas.agent import AgentResult, ResumeRequest
+from app.schemas.base import JsonObject
 from app.schemas.conversation import Turn
 from app.schemas.data_file import DataFileRecord, RequestDataFile
 from app.schemas.request import DesignRequest
@@ -58,15 +59,7 @@ class AgentService:
         payload = request.model_dump(mode="json")
         # 历史只信任服务端记录，覆盖前端可能携带的同名扩展字段；记录是完整的，这里按 token 预算裁剪
         payload["history"] = trim_history(
-            [
-                {
-                    "user": turn.prompt,
-                    "assistant": turn.summary,
-                    "outcome": turn.outcome,
-                }
-                for turn in turns
-            ],
-            settings.history_max_tokens,
+            [self._history_turn(turn) for turn in turns], settings.history_max_tokens
         )
         # 同样只信任服务端读取的结果；会话内的文件每一轮都可用，不附带也能查询
         # 请求会进检查点，只放摘要；工具要用的列概况和路径通过运行上下文传给图
@@ -153,6 +146,21 @@ class AgentService:
             self.release(thread_id)
             raise
 
+    @staticmethod
+    def _history_turn(turn: Turn) -> JsonObject:
+        """一轮历史：原话、回复、结果，有轮次记录时一并带上，由各节点决定给模型看哪些"""
+        item: JsonObject = {
+            "user": turn.prompt,
+            "assistant": turn.summary,
+            "outcome": turn.outcome,
+        }
+        for key in ("changes", "queries"):
+            if records := getattr(turn, key):
+                item[key] = [record.model_dump(mode="json") for record in records]
+        if turn.clarifications:
+            item["clarifications"] = turn.clarifications
+        return item
+
     def _run_context(self, records: list[DataFileRecord]) -> RunContext:
         return RunContext(data=DataContext(tuple(records), self.data_files.root))
 
@@ -192,6 +200,8 @@ class AgentService:
 
     async def _save_turn(self, state, result: AgentResult) -> None:
         # 历史写入失败不影响本次结果交付，只记录日志
+        completed = result.status == "completed"
+        context = state.get("input_context")
         try:
             await self.store.save_turn(
                 Turn(
@@ -202,6 +212,10 @@ class AgentService:
                     outcome=result.status,
                     summary=self._summarize(result),
                     created_at=datetime.now(UTC),
+                    # 只有完成的轮次交付了修改、问答成功；其余结果下状态里即使有也不记
+                    changes=(state.get("changes") or []) if completed else [],
+                    queries=(state.get("queries") or []) if completed else [],
+                    clarifications=context.clarification_history if context else [],
                 )
             )
         except Exception: