Mem0 Python SDK (v2.0.18)

Bug Fixes:

• Core: Percent-escape %, &, and = in user_id, agent_id, and run_id when building the session scope key for the recent-conversation buffer, so the key stays unambiguous for ids containing those characters. Ordinary ids keep their existing key; an id already containing %, &, or = maps to a new key, so its buffer starts empty once and refills on the next add(). Stored memories are unaffected. Reported by @OfficialAbhinavSingh (#6892)
• Vector Stores: Raise ValueError when a PGVector in/nin filter value is not a list. A string value was previously iterated character by character into the generated = ANY(...) array (so {"user_id": {"in": "alice"}} matched a, l, i, c, e), and a non-iterable value raised a bare TypeError from deep inside filter building (#6879)
• Vector Stores: Reject index_accuracy=0 in the Oracle AI Vector Search config. The range check sat behind a truthiness test, so 0 skipped validation entirely and was passed through to WITH TARGET ACCURACY 0 instead of raising (#6848)
• Vector Stores: Close the Oracle connection or pool that Mem0 opened when initialization fails. A client version check, a database version check, or a create_col() error previously propagated with the connection still open, leaking it for the life of the process. A caller-supplied client is left untouched (#6839)