Supporting metadata for extracted memories

[RO-HIT17]

Hi mem0 team

I’ve been using custom_fact_extraction_prompt and really like how much control it gives over what gets stored as memory. I wanted to ask about a possible extension to allow custom metadata to be attached to extracted facts.

In applications, like personalized tutoring, memories represent a student’s learning state, not just a static fact. Along with the extracted text, it’s useful to capture:

• the category of memory (progress, difficulty, misconception, preference, etc.)
• the progress level associated with it

For example:

• strong → good progress / concept well understood
• medium → actively working on it
• weak → struggling or failing

Examples:

• “Finished 50% of calculus chapter” → progress, strong
• “Still stuck on derivatives” → learning difficulty, weak

Would it be feasible for custom_fact_extraction_prompt to optionally return metadata along with each fact?

Something like:

{
  "facts": [
    {
      "text": "Finished 50% of calculus chapter",
      "metadata": {
        "category": "progress",
        "level": "strong"
      }
    }
  ]
}

Alternatively, is there an existing or recommended pattern for attaching progress levels or custom categories to extracted memories?

Thanks!