Bug Description

The Mem0 memory provider writes memories with both user_id and agent_id, but reads them back with only user_id.

That leaves mem0_profile, mem0_search, and prefetch with partial recall on Mem0 Platform. Older un-attributed memories are visible, while memories saved with agent attribution are skipped.

Related but not a duplicate: #25084 covers gateway namespace fragmentation. This report is about the read filter missing agent-attributed rows inside the same user namespace.

Steps to Reproduce

1. Configure the Mem0 provider.
2. Use Hermes through a gateway session so initialize(..., user_id=...) receives the platform user id.
3. Let Hermes save memories through sync_turn() or mem0_conclude().
4. Call mem0_profile or mem0_search.
5. Compare the current read filter with an OR filter that includes the same user plus the active agent id.

Current read filter:

{"user_id": self._user_id}

Write filter:

{"user_id": self._user_id, "agent_id": self._agent_id}

Expected Behavior

Reads should include both:

• older user-only memories
• memories saved by the same user with agent attribution

Actual Behavior

Reads only return user-only memories. Agent-attributed memories are not included.

In a live Mem0 Platform account, the difference is visible with paginated get_all() calls for the same user:

{"user_id": "503782402"}
count: 153
agent_ids: {None: 153}

{"OR": [{"user_id": "503782402"}, {"user_id": "503782402", "agent_id": "hermie"}]}
count: 3379
agent_ids: {"hermie": 2520, "gideon": 447, "hermes": 259, None: 153}

Environment

• Hermes Agent: current main
• Mem0 SDK package: mem0ai 2.0.4
• Memory provider: mem0
• Platform: Telegram gateway session

Proposed Fix

Change the Mem0 provider read filter to include the existing plain user scope and the active agent-attributed scope:

{
    "OR": [
        {"user_id": self._user_id},
        {"user_id": self._user_id, "agent_id": self._agent_id},
    ]
}

This keeps compatibility with un-attributed memories and restores recall for memories saved with agent attribution.