(venv) [root@VM-186-194-centos trpc-agent-python]# python3 examples/mempalace_tools/run_agent.py 
⚠️ Failed to clean MemPalace demo data: ~/.mempalace
============================================================
First phase: write memories and verify cross-session reads
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🆔 Session ID: d9118bff...
📝 User: Use mempalace_search to check whether you remember my name.
🤖 Assistant: The user is asking me to check if I remember their name using mempalace_search. I should search for their name in the memory system. I'll use a concise query to search for name-related information.

I need to use mempalace_search with:
- query: something related to "name" 
- I should use the configured wing: personal_assistant_alice
- room: user_profile (though this is optional in the search function)

Let me search for "name" to see if I have any stored information about the user's name.
🔧 [Invoke Tool: mempalace_search({'query': 'name', 'wing': 'personal_assistant_alice', 'room': 'user_profile'})]
No palace found at ~/.mempalace: ~/.mempalace
📊 [Tool Result: {'error': 'No palace found', 'hint': 'Run: mempalace init <dir> && mempalace mine <dir>'}]
The search returned an error saying "No palace found". This means the MemPalace hasn't been initialized yet, or there's no stored memory. So I don't currently have any memory of the user's name.

I should let the user know that I don't currently have any memory of their name stored, and perhaps ask them to tell me their name so I can remember it.I searched my memory for your name, but I don't have any stored information about you yet — the memory palace hasn't been initialized with any user profile data.

Would you like to tell me your name so I can remember it for future conversations? 🧠
----------------------------------------
🆔 Session ID: c3b2b9b1...
📝 User: Use mempalace_add_drawer to remember that my name is Alice.
🤖 Assistant: The user wants me to remember that their name is Alice using the mempalace_add_drawer function. According to my memory policy, when the user tells me stable personal information, I should call mempalace_add_drawer.

I need to use:
- wing: personal_assistant_alice (as configured in my scope)
- room: user_profile (as configured in my scope)
- content: Something concise about their name being Alice

Let me call the function with these parameters.
🔧 [Invoke Tool: mempalace_add_drawer({'wing': 'personal_assistant_alice', 'room': 'user_profile', 'content': "User's name is Alice."})]
📊 [Tool Result: {'success': True, 'drawer_id': 'drawer_personal_assistant_alice_user_profile_d9b5c67e3df06a7c9a67df63', 'wing': 'personal_assistant_alice', 'room': 'user_profile'}]
The memory has been successfully stored. I should confirm this to Alice.Got it, Alice! I've stored your name in my memory. I'll remember that from now on. Is there anything else you'd like me to remember about yourself?
----------------------------------------
🆔 Session ID: 992cd70a...
📝 User: Use mempalace_add_drawer to remember that my favorite food is Italian food.
🤖 Assistant: The user wants me to remember that their favorite food is Italian food. I need to use mempalace_add_drawer to store this information. According to my instructions, I should use the configured wing and room:
- wing: personal_assistant_alice
- room: user_profile

I need to write concise verbatim content. The content should be "My favorite food is Italian food" or something similar and clear.
🔧 [Invoke Tool: mempalace_add_drawer({'wing': 'personal_assistant_alice', 'room': 'user_profile', 'content': 'My favorite food is Italian food.'})]
📊 [Tool Result: {'success': True, 'drawer_id': 'drawer_personal_assistant_alice_user_profile_c99ac7087bcafd299a0eda14', 'wing': 'personal_assistant_alice', 'room': 'user_profile'}]
The memory was successfully added. I should confirm this to the user in a friendly way.Got it! I've saved that your favorite food is Italian food. 🍝 I'll remember this for future conversations. If you ever want me to recall or update this information, just let me know!
----------------------------------------
🆔 Session ID: 65dfeda4...
📝 User: Use mempalace_search to recall my name and favorite food.
🤖 Assistant: The user is asking me to recall their name and favorite food using mempalace_search. I need to search for this information in the MemPalace memory system. I should use the configured scope which is:
- wing: personal_assistant_alice
- room: user_profile

I'll search for information about the user's name and favorite food. I can make a search query that should capture both pieces of information.I'll search for your name and favorite food in my memory.
🔧 [Invoke Tool: mempalace_search({'query': 'name favorite food', 'wing': 'personal_assistant_alice', 'room': 'user_profile'})]
📊 [Tool Result: {'query': 'name favorite food', 'filters': {'wing': 'personal_assistant_alice', 'room': 'user_profile'}, 'total_before_filter': 2, 'results': [{'text': 'My favorite food is Italian food.', 'wing': 'personal_assistant_alice', 'room': 'user_profile', 'source_file': '?', 'created_at': '2026-05-09T10:38:22.357784', 'similarity': 0.625, 'distance': 0.3747, 'effective_distance': 0.3747, 'closet_boost': 0.0, 'matched_via': 'drawer', 'bm25_score': 1.566}, {'text': "User's name is Alice.", 'wing': 'personal_assistan... <truncated, 747 chars total>]
I found the information in memory. The search returned two results:
1. User's name is Alice
2. My favorite food is Italian food

I can now answer the user with this recalled information.I found your information in my memory! Here's what I recall:

- **Your name:** Alice
- **Your favorite food:** Italian food

These were stored in my memory on May 9, 2026. Is there anything else you'd like me to remember for you?
----------------------------------------
🆔 Session ID: 49bb2724...
📝 User: Use mempalace_diary_write to write a diary entry: Alice tested the MemPalace tools example today.
🤖 Assistant: The user wants me to write a diary entry using mempalace_diary_write. Looking at the function parameters:
- entry (required): "Alice tested the MemPalace tools example today."
- agent_name (optional): Defaults to the current agent when omitted, which would be "personal_assistant"
- topic (optional): Default is "general" 
- wing (optional): Default is "wing_<agent_name>" which would be "wing_personal_assistant"

But wait, looking at the memory policy at the top, it says to use a specific wing: "personal_assistant_alice" and the configured wing above. Let me re-read...

The memory policy says:
- "Use MemPalace with this fixed scope:
  - wing: personal_assistant_alice
  - room: user_profile"
- "When the user asks you to write or read an agent diary, call mempalace_diary_write or mempalace_diary_read with the configured wing above."

So I should use wing: "personal_assistant_alice" for the diary write.

The entry is clearly provided: "Alice tested the MemPalace tools example today."

I have all the required parameters, so I can proceed with the function call.
🔧 [Invoke Tool: mempalace_diary_write({'entry': 'Alice tested the MemPalace tools example today.', 'wing': 'personal_assistant_alice'})]
📊 [Tool Result: {'success': True, 'entry_id': 'diary_personal_assistant_alice_20260509_103835213651_ab0ba2fb772a', 'agent': 'personal_assistant', 'topic': 'general'}]
The diary entry has been successfully written to MemPalace. The entry was stored under the configured wing "personal_assistant_alice" and has been assigned a unique entry ID. I should confirm this to the user.I've successfully written the diary entry to MemPalace. The entry "Alice tested the MemPalace tools example today." has been recorded under the **personal_assistant_alice** wing with entry ID `diary_personal_assistant_alice_20260509_103835213651_ab0ba2fb772a`.
----------------------------------------
🆔 Session ID: c2118706...
📝 User: Use mempalace_diary_read to read the latest diary entries.
🤖 Assistant: The user wants me to read the latest diary entries using mempalace_diary_read. According to the memory policy, I should use the configured wing which is "personal_assistant_alice". The function has optional parameters:
- agent_name: defaults to the current agent when omitted
- last_n: default is 10
- wing: optional wing filter

Since the user just wants the latest entries without specifying any parameters, I'll call the function with just the wing parameter set to the configured wing "personal_assistant_alice", and let the other parameters use their defaults.
🔧 [Invoke Tool: mempalace_diary_read({'wing': 'personal_assistant_alice'})]
📊 [Tool Result: {'agent': 'personal_assistant', 'entries': [{'date': '2026-05-09', 'timestamp': '2026-05-09T10:38:35.213651', 'topic': 'general', 'content': 'Alice tested the MemPalace tools example today.'}], 'total': 1, 'showing': 1}]
The diary read returned 1 entry. I should present this information clearly to the user.Here are the latest diary entries for the personal_assistant agent:

| Date | Topic | Content |
|------|-------|---------|
| 2026-05-09 | general | Alice tested the MemPalace tools example today. |

There is currently **1 entry** in the diary. Would you like me to write a new entry or perform any other actions?
----------------------------------------
🆔 Session ID: 22cbd266...
📝 User: Use mempalace_kg_add to add this fact: Alice likes Italian food.
🤖 Assistant: The user wants me to add a fact to the knowledge graph. Let me break down what they want:

- Subject: Alice
- Predicate: likes (or a similar relationship type)
- Object: Italian food

I should use the mempalace_kg_add function with these parameters. The required parameters are:
- subject: "Alice"
- predicate: "likes"
- object: "Italian food"

The optional parameters like confidence, source_file, source_drawer_id, valid_from, valid_to are not specified, so I won't include them.I'll add that fact to the MemPalace knowledge graph for you.
🔧 [Invoke Tool: mempalace_kg_add({'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food'})]
📊 [Tool Result: {'success': True, 'triple_id': 't_alice_likes_italian_food_a3f0581e2437', 'fact': 'Alice -> likes -> Italian food'}]
The fact has been successfully added to the knowledge graph. The triple was created with ID "t_alice_likes_italian_food_a3f0581e2437" and represents the relationship "Alice -> likes -> Italian food". I should confirm this success to the user.I've successfully added that fact to the MemPalace knowledge graph:

**Fact added:** Alice → likes → Italian food

The relationship has been stored and can now be queried using the knowledge graph tools.
----------------------------------------
🆔 Session ID: de9570af...
📝 User: Use mempalace_kg_query to query facts about Alice.
🤖 Assistant: The user wants me to query the knowledge graph for facts about "Alice". I should use the mempalace_kg_query function with "Alice" as the entity parameter.
🔧 [Invoke Tool: mempalace_kg_query({'entity': 'Alice'})]
📊 [Tool Result: {'entity': 'Alice', 'as_of': None, 'facts': [{'direction': 'outgoing', 'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food', 'valid_from': None, 'valid_to': None, 'confidence': 1.0, 'source_closet': None, 'current': True}], 'count': 1}]
The knowledge graph query returned one fact about Alice:
- Alice likes Italian food (confidence 1.0, current = true)

This is a stored fact in the knowledge graph. I should present this to the user clearly.Here's what I found in the knowledge graph about **Alice**:

| Subject | Predicate | Object | Confidence | Status |
|---------|-----------|--------|------------|--------|
| Alice | likes | Italian food | 1.0 | Current |

There is **1 fact** recorded: Alice likes Italian food. This fact is currently valid and has full confidence.
----------------------------------------
🆔 Session ID: 3f112387...
📝 User: Use mempalace_kg_timeline to show Alice's knowledge graph timeline.
🤖 Assistant: The user wants to see Alice's knowledge graph timeline. I should use the mempalace_kg_timeline function to show all knowledge graph facts. The function has an optional "entity" parameter to filter for a specific entity, but the user wants to see "Alice's knowledge graph timeline" - this could mean either:
1. The entire timeline (no entity filter)
2. Timeline filtered for entity "Alice"

Since the user said "Alice's knowledge graph timeline", I think they want to see facts related to Alice specifically. Let me call the function with entity="Alice".
🔧 [Invoke Tool: mempalace_kg_timeline({'entity': 'Alice'})]
📊 [Tool Result: {'entity': 'Alice', 'timeline': [{'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food', 'valid_from': None, 'valid_to': None, 'current': True}], 'count': 1}]
The timeline shows one fact about Alice - that she likes Italian food. I should present this information clearly to the user.Here is Alice's knowledge graph timeline:

| Subject | Predicate | Object | Valid From | Valid To | Current |
|---------|-----------|--------|------------|----------|---------|
| Alice | likes | Italian food | — | — | ✅ Yes |

**Summary:** The timeline contains **1 fact** — Alice likes Italian food. This relationship is currently active with no specific date range set.
----------------------------------------
Sleeping for 2 seconds before persistence verification...
============================================================
Second phase: read previously stored data with new sessions
============================================================
🆔 Session ID: b21c8b4b...
📝 User: Use mempalace_search to recall my name and favorite food from the previous sessions.
🤖 Assistant: The user is asking me to recall their name and favorite food from previous sessions. According to my memory policy, I should use mempalace_search to look for this information before answering questions about remembered user information.

I need to search for information about the user's name and favorite food. I'll use the configured wing and room parameters as specified in my instructions:
- wing: personal_assistant_alice
- room: user_profile

Let me search for this information with a concise query.I'll search your memory for your name and favorite food information.
🔧 [Invoke Tool: mempalace_search({'query': 'name favorite food', 'wing': 'personal_assistant_alice', 'room': 'user_profile', 'limit': 10})]
📊 [Tool Result: {'query': 'name favorite food', 'filters': {'wing': 'personal_assistant_alice', 'room': 'user_profile'}, 'total_before_filter': 2, 'results': [{'text': 'My favorite food is Italian food.', 'wing': 'personal_assistant_alice', 'room': 'user_profile', 'source_file': '?', 'created_at': '2026-05-09T10:38:22.357784', 'similarity': 0.625, 'distance': 0.3747, 'effective_distance': 0.3747, 'closet_boost': 0.0, 'matched_via': 'drawer', 'bm25_score': 1.566}, {'text': "User's name is Alice.", 'wing': 'personal_assistan... <truncated, 747 chars total>]
Great! The search returned two results from the previous sessions:
1. The user's favorite food is Italian food
2. The user's name is Alice

I should now answer the user's question using this retrieved information.I found your information from our previous sessions! Here's what I recall:

- **Your name**: Alice
- **Your favorite food**: Italian food

Both of these were stored in your profile during our earlier conversations. Is there anything you'd like me to help you with today, Alice? Perhaps I can suggest some Italian restaurants or help with Italian recipes? 😊
----------------------------------------
🆔 Session ID: 364043ce...
📝 User: Use mempalace_diary_read to read the latest diary entries from the previous sessions.
🤖 Assistant: The user wants me to read the latest diary entries from previous sessions. I need to use the mempalace_diary_read function. According to the memory policy, I should use the configured wing which is "personal_assistant_alice". Let me check the function parameters:

- agent_name: optional, defaults to current agent when omitted
- last_n: optional, default 10, number of recent entries
- wing: optional, but I should use "personal_assistant_alice" as configured

I'll call the function with the wing parameter set to the configured wing.I'll read the latest diary entries from previous sessions for you.
🔧 [Invoke Tool: mempalace_diary_read({'wing': 'personal_assistant_alice', 'last_n': 10})]
📊 [Tool Result: {'agent': 'personal_assistant', 'entries': [{'date': '2026-05-09', 'timestamp': '2026-05-09T10:38:35.213651', 'topic': 'general', 'content': 'Alice tested the MemPalace tools example today.'}], 'total': 1, 'showing': 1}]
The diary read function returned 1 entry from May 9, 2026. This shows that Alice previously tested the MemPalace tools example. I should present this information to the user in a clear, organized way.I found **1 diary entry** from previous sessions:

---

**Date:** May 9, 2026 at 10:38 AM

**Topic:** general

**Entry:** "Alice tested the MemPalace tools example today."

---

This appears to be the only diary entry recorded so far. Would you like me to write a new diary entry for this session, or is there anything else you'd like me to help you with?
----------------------------------------
🆔 Session ID: 2c7f9442...
📝 User: Use mempalace_kg_query to query facts about Alice from the previous sessions.
🤖 Assistant: The user is asking me to query facts about "Alice" from the knowledge graph using the mempalace_kg_query function. I should call this function with "Alice" as the entity parameter.
🔧 [Invoke Tool: mempalace_kg_query({'entity': 'Alice'})]
📊 [Tool Result: {'entity': 'Alice', 'as_of': None, 'facts': [{'direction': 'outgoing', 'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food', 'valid_from': None, 'valid_to': None, 'confidence': 1.0, 'source_closet': None, 'current': True}], 'count': 1}]
The knowledge graph query returned one fact about Alice: she likes Italian food. This fact has a confidence score of 1.0 and is currently valid (current: true). I should share this information with the user.I found **1 fact** about Alice in the knowledge graph from previous sessions:

| Subject | Predicate | Object | Confidence | Current |
|---------|-----------|--------|------------|---------|
| Alice | likes | Italian food | 1.0 | ✅ Yes |

This indicates that Alice enjoys Italian food, which was recorded with full confidence. Would you like me to query for additional relationships (incoming or specific dates), or add/update any facts about Alice?
----------------------------------------
🆔 Session ID: e8d9cf11...
📝 User: Use mempalace_kg_timeline to show Alice's knowledge graph timeline from the previous sessions.
🤖 Assistant: The user is asking me to show Alice's knowledge graph timeline from previous sessions. I need to use the mempalace_kg_timeline function. Looking at the function definition, it has one optional parameter "entity" to filter the timeline for a specific entity.

Since the user mentioned "Alice's knowledge graph timeline", I should query for "Alice" as the entity parameter.I'll retrieve Alice's knowledge graph timeline from the previous sessions.
🔧 [Invoke Tool: mempalace_kg_timeline({'entity': 'Alice'})]
📊 [Tool Result: {'entity': 'Alice', 'timeline': [{'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food', 'valid_from': None, 'valid_to': None, 'current': True}], 'count': 1}]
The timeline shows one fact about Alice - that she likes Italian food. Let me present this information clearly to the user.Here's Alice's knowledge graph timeline from previous sessions:

| Subject | Predicate | Object | Valid From | Valid To | Current |
|---------|-----------|--------|------------|----------|---------|
| Alice | likes | Italian food | - | - | ✓ Yes |

**Summary:** There is currently **1 fact** stored about Alice in the knowledge graph:
- **Alice likes Italian food** (current and valid)

This appears to be the only relationship fact recorded from previous sessions. Would you like me to add more facts about Alice, or query for any specific relationships?
----------------------------------------
============================================================
Third phase: test KG invalidation after persistence verification
============================================================
🆔 Session ID: a0102142...
📝 User: Use mempalace_kg_invalidate to mark the fact Alice likes Italian food as ended today.
🤖 Assistant: The user wants me to invalidate a knowledge graph fact about Alice liking Italian food. I need to use the mempalace_kg_invalidate function.

Looking at the function parameters:
- subject: "Alice" (the person who likes the food)
- predicate: This would be something like "likes" or "likes_food" - I need to determine what the exact predicate is
- object: "Italian food" or similar
- ended: Optional, defaults to today

Since I need to invalidate a specific fact, I should be careful about the exact format. The user said "Alice likes Italian food" so:
- subject: "Alice"
- predicate: "likes" 
- object: "Italian food"
- ended: I can leave this as default (today)

Let me call the function with these parameters.I'll invalidate the fact that Alice likes Italian food, marking it as ended today.
🔧 [Invoke Tool: mempalace_kg_invalidate({'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food'})]
📊 [Tool Result: {'success': True, 'fact': 'Alice -> likes -> Italian food', 'ended': '2026-05-09'}]
The knowledge graph fact has been successfully invalidated. The fact "Alice -> likes -> Italian food" has been marked as ended on today's date (2026-05-09). I should inform the user that this was completed successfully.Done! I've marked the fact "Alice likes Italian food" as ended today (2026-05-09). This relationship is now considered no longer current in the knowledge graph.
----------------------------------------
🆔 Session ID: eac5f0ed...
📝 User: Use mempalace_kg_query to query facts about Alice again after invalidation.
🤖 Assistant: The user is asking me to query facts about Alice using mempalace_kg_query. They mention "after invalidation" which suggests there was some previous invalidation of facts about Alice, but I don't have that context in this conversation.

Let me query the knowledge graph for facts about "Alice" to see what current facts exist.
🔧 [Invoke Tool: mempalace_kg_query({'entity': 'Alice'})]
📊 [Tool Result: {'entity': 'Alice', 'as_of': None, 'facts': [{'direction': 'outgoing', 'subject': 'Alice', 'predicate': 'likes', 'object': 'Italian food', 'valid_from': None, 'valid_to': '2026-05-09', 'confidence': 1.0, 'source_closet': None, 'current': False}], 'count': 1}]
The query results show that there is one fact about Alice:
- Alice likes Italian food (outgoing relationship)
- But this fact has `valid_to: "2026-05-09"` and `current: false`

This is the fact that was previously invalidated. After invalidation, the fact is still in the knowledge graph (for historical purposes), but it's marked as no longer current. The system shows it with:
- `valid_to` set to the invalidation date
- `current: false` flag

So the user can see that:
1. The fact still exists in the knowledge graph (for audit/history purposes)
2. It's marked as not current anymore
3. The invalidation date is recorded

I should present this clearly to the user.Here are the knowledge graph facts about Alice after the invalidation:

**Query Results for "Alice":**

| Subject | Predicate | Object | Valid To | Current |
|---------|-----------|--------|----------|---------|
| Alice | likes | Italian food | 2026-05-09 | ❌ false |

---

**Summary:**
- **1 fact found** about Alice
- The fact "Alice likes Italian food" is **still present** in the knowledge graph (for historical/audit purposes)
- However, it's now marked as **`current: false`** and has a `valid_to` date of **2026-05-09** (the invalidation date)

This demonstrates how MemPalace's knowledge graph handles invalidation:
- ❌ Invalidated facts are **not deleted** — they remain as historical records
- ✅ They are marked as **non-current** so they won't be considered active
- 📅 The `valid_to` field records when the fact ceased to be true

If you want to see only **current/active facts**, you'd need to filter by the `current: true` flag (though this filtering would need to be done in your application logic, as the query returns all facts for transparency).
----------------------------------------
🧹 Cleaned MemPalace demo drawers: 3
🧹 deleted ~/.mempalace/knowledge_graph.sqlite3
🧹 deleted ~/.mempalace/knowledge_graph.sqlite3-wal
🧹 deleted ~/.mempalace/knowledge_graph.sqlite3-shm
