mem0

Bug Fixes:

• Vector Stores: Fix reset() silently leaving stale vectors behind on local (on-disk) Qdrant when the old collection directory could not be removed, for example an open file handle on Windows or NFS (#6412)
• Core: Stop update() metadata from overwriting or injecting user_id, agent_id, run_id, or actor_id. These identity fields are immutable after creation, so passing them in metadata can no longer move a memory into a different tenant's scope (#6278)
• Vector Stores: Scope Pinecone delete_col()/reset() to the configured namespace instead of deleting the whole index, so resetting a namespaced Pinecone store no longer wipes out the other namespaces sharing that index (#6287)
• Vector Stores: Convert Baidu Mochow's raw L2 distance into a similarity score in search() (1 / (1 + distance)), so closer matches rank higher instead of lower, matching the Milvus provider and the rest of the VectorStoreBase contract (#6435)
• LLMs: Read OPENAI_BASE_URL (was OPENAI_API_BASE) in OpenAIStructuredLLM, matching the official OpenAI SDK's environment variable and the rest of the OpenAI-compatible providers (#6322)

Improvements:

• LLMs: Remove a dead, no-op api_key attribute check from LLMBase.__init__ (#6460)

Changes:

• Client: Remove the retrieval_criteria parameter from MemoryClient.update_project()/AsyncMemoryClient.update_project() and Project.update()/AsyncProject.update(). It was accepted and forwarded but never affected retrieval, so removing it is not a behavior change (#6313)