# Mem0 ts-v3.1.6 — Mem0 Node SDK (v3.1.6)

- Product: Mem0 (https://whatsnew.fyi/product/mem0)
- Vendor: Mem0
- Date: 2026-08-11
- Version: ts-v3.1.6
- Original notes: https://github.com/mem0ai/mem0/releases/tag/ts-v3.1.6
- Permalink: https://whatsnew.fyi/product/mem0/releases/ts-v3.1.6

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Add an Oracle AI Vector Search vector store (oracledb) to the OSS SDK with pooled connections, HNSW/IVF indexes, optional indexAccuracy target, JSON payload filtering, and six selectable distance metrics
- **fixed** — Percent-escape %, &, and = in user_id, agent_id, and run_id when building the session scope key for the recent-conversation buffer to keep the key unambiguous for ids containing those characters
- **fixed** — Close and clear the Oracle pool that Mem0 created when initialize() fails, and reset the cached init promise so the next call retries instead of replaying the rejection forever
- **fixed** — Validate Oracle insert() batches before touching the database: ids and payloads must match vectors in length to prevent short arrays from writing rows with undefined ids or silently dropping payloads
- **changed** — Cut Oracle round trips by sending the whole batch through one executeMany() with explicit bindDefs instead of one INSERT per vector
- **changed** — Optimize list() to read the total from a COUNT(*) OVER () window in the same statement instead of issuing a second count query
- **changed** — Add VECTOR_INDEX_TRANSFORM hint to unfiltered search() so the vector index is used
- **security** — Patch 8 high and 18 medium severity dependency vulnerabilities across the pnpm workspace via pnpm.overrides (undici, brace-expansion, ip-address)

**New Features:**
- **Vector Stores:** Add an Oracle AI Vector Search vector store (`oracledb`) to the OSS SDK, with pooled connections, `HNSW`/`IVF` indexes, an optional `indexAccuracy` target, JSON payload filtering, and six selectable distance metrics ([#6690](https://github.com/mem0ai/mem0/pull/6690))

**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](https://github.com/OfficialAbhinavSingh) ([#6892](https://github.com/mem0ai/mem0/pull/6892))
- **Vector Stores:** Close and clear the Oracle pool that Mem0 created when `initialize()` fails, and reset the cached init promise so the next call retries instead of replaying the rejection forever. A caller-supplied `client` is left untouched ([#6839](https://github.com/mem0ai/mem0/pull/6839))
- **Vector Stores:** Validate Oracle `insert()` batches before touching the database: `ids` and `payloads` must match `vectors` in length, so a short array can no longer write rows with `undefined` ids or silently drop payloads ([#6839](https://github.com/mem0ai/mem0/pull/6839))

**Improvements:**
- **Vector Stores:** Cut Oracle round trips. `insert()` now sends the whole batch through one `executeMany()` with explicit `bindDefs` instead of one `INSERT` per vector, `list()` reads the total from a `COUNT(*) OVER ()` window in the same statement instead of issuing a second count query, and an unfiltered `search()` adds the `VECTOR_INDEX_TRANSFORM` hint so the vector index is used ([#6835](https://github.com/mem0ai/mem0/pull/6835))

**Security:**
- **Dependencies:** Patched 8 high and 18 medium severity dependency vulnerabilities across the pnpm workspace via `pnpm.overrides` (`undici`, `brace-expansion`, `ip-address`) ([#6847](https://github.com/mem0ai/mem0/pull/6847))