feat: Add mem0 integration

[sjrl]

Related Issues

• fixes https://github.com/deepset-ai/haystack-private/issues/347

Proposed Changes:

Add a Mem0 integration for Haystack.

This PR adds:

• A Mem0MemoryStore which is meant to house all relevant methods for interacting with the Mem0 Memory client.
• Two components that utilize the Mem0MemoryStore: Mem0MemoryRetriever and Mem0MemoryWriter. Very analogous to our Retriever and Writer components for Document Stores.
• Two pre-made tools Mem0MemoryRetrieverTool and Mem0MemoryWriterTool that have configuration options.

I recommend checking out the two example files:

• agent_memory.py to see how the tools can be used in practice
• agent_memory_components.py to see how the components can be used in practice

How did you test it?

Added unit and integration tests.

Notes for the reviewer

This was initially based off of the Mem0 integration added in haystack-experimental.

Some notable differences are:

• The addition of the components and tools.
• The decision to not utilize a MemoryStore protocol for now. While also reviewing the Cognee integration it became apparent that trying to create a MemoryStore protocol that was generalizable between the two integrations was not easily possible and was providing more harm than good. Basically the concept of how to manage Memory is not yet standardized since its a very new concept so I believe it's better to create dedicated Retriever and Writer components to each memory store than trying to force a protocol to work.

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.

[github-actions]

Coverage report (mem0)

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
integrations/mem0/src/haystack_integrations/components/retrievers/mem0
retriever.py
integrations/mem0/src/haystack_integrations/components/writers/mem0
writer.py
integrations/mem0/src/haystack_integrations/memory_stores/mem0
errors.py
filters.py					148-149
memory_store.py
integrations/mem0/src/haystack_integrations/tools/mem0
retriever_tool.py
writer_tool.py
Project Total

This report was generated by python-coverage-comment-action

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	mem0ai@​2.0.2

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[bogdankostic]

Looking already good overall, just have some minor comments here and there.

[bogdankostic]

Looking good!