fix: enforce ISO 8601 timestamp format in episodic memory

demo/utils/simple_memory_manager.py

@@ -244,7 +244,6 @@ async def search(
             query: Query text
             top_k: Number of results to return (default: 3)
             mode: Retrieval mode (default: "rrf")
-                - "rrf": RRF fusion (recommended)
                 - "keyword": Keyword retrieval (BM25)
                 - "vector": Vector retrieval
                 - "hybrid": Keyword + Vector + Rerank

docker-compose.yaml

@@ -14,7 +14,6 @@ services:
       - "27017:27017"
     volumes:
       - mongodb_data:/data/db
-      - ./docker/mongodb/init:/docker-entrypoint-initdb.d
     networks:
       - memsys-network
     healthcheck:

src/biz_layer/mem_db_operations.py

@@ -143,7 +143,7 @@ def _convert_timestamp_to_time(
             try:
                 dt = from_iso_format(timestamp)
                 return to_iso_format(dt)
-            except:
+            except Exception:
                 # If parsing fails, return string directly
                 return timestamp
         else:

src/infra_layer/adapters/out/search/repository/episodic_memory_milvus_repository.py

@@ -124,7 +124,7 @@ async def create_and_save_episodic_memory(
                 metadata_json = metadata
                 try:
                     metadata_dict = json.loads(metadata)
-                except:
+                except Exception:
                     metadata_dict = {}
 
             # Prepare entity data

src/memory_layer/prompts/en/episode_mem_prompts.py

@@ -17,12 +17,12 @@
 Custom instructions:
 {custom_instructions}
 
-IMPORTANT TIME HANDLING:
-- Use the provided "Conversation start time" as the exact time when this conversation/episode began
-- When the conversation mentions relative times (e.g., "yesterday", "last week"), preserve both the original relative expression AND calculate the absolute date
-- Format time references as: "original relative time (absolute date)" - e.g., "last week (May 7, 2023)"
-- This dual format supports both absolute and relative time-based questions
-- All absolute time calculations should be based on the provided start time
+IMPORTANT TIME HANDLING (STRICT ISO 8601):
+- Always use ISO 8601 format with timezone: YYYY-MM-DDTHH:MM:SSZ or YYYY-MM-DDTHH:MM:SS+HH:MM
+- Example correct formats: 2026-01-23T02:19:25Z or 2026-01-23T10:07:00+08:00
+- NEVER use Chinese characters (年, 月, 日), weekdays, or partial times
+- Example incorrect: "2026年1月22日11:25:33" or "2026年1月23日 02:19:25 UTC"
+- Always convert relative times to absolute ISO 8601 format
 
 Please generate a structured episodic memory and return only a JSON object containing the following two fields:
 {{

src/memory_layer/prompts/zh/episode_mem_prompts.py

@@ -20,6 +20,12 @@
 自定义指令：
 {custom_instructions}
 
+重要时间格式要求（必须遵守）：
+- 必须使用ISO 8601格式：YYYY-MM-DDTHH:MM:SSZ 或 YYYY-MM-DDTHH:MM:SS+HH:MM
+- 正确示例：2026-01-23T02:19:25Z 或 2026-01-23T10:07:00+08:00
+- 禁止使用中文时间格式（如2026年1月22日11:25:33）、星期几、部分时间
+- 相对时间（如昨天、上周）必须转换为绝对ISO 8601格式
+
 请遵循以下指导原则：
 
 1.  **叙事性与连贯性**：