MemPalace

v3.4.0 Feature

This release adds 3 notable features for engineering teams evaluating rollout.

Published 1mo RAG & Retrieval

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✓ No known CVEs patched

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✓ No known CVEs patched in this version

Topics

ai chromadb llm mcp memory python

Summary

AI summary

Pluggable vector backends, Docker images for MCP server and CLI, and reliability fixes are introduced.

Changes in this release

Type	Severity	Summary	CVE
Feature
Feature	Medium	Adds pluggable vector backends: Qdrant, pgvector, sqlite_exact. Adds pluggable vector backends: Qdrant, pgvector, sqlite_exact. Source: llm_adapter@2026-06-06 Confidence: high	—
Feature	Medium	Adds Docker images for MCP server and CLI (CPU + GPU). Adds Docker images for MCP server and CLI (CPU + GPU). Source: llm_adapter@2026-06-06 Confidence: high	—
Feature	Medium	Adds `mempalace migrate-wings` one‑time migration for legacy wing names. Adds `mempalace migrate-wings` one‑time migration for legacy wing names. Source: llm_adapter@2026-06-06 Confidence: high	—
Bugfix
Bugfix	High	Prevents silent data loss from `drawer_id` hash collisions. Prevents silent data loss from `drawer_id` hash collisions. Source: llm_adapter@2026-06-06 Confidence: high	—
Bugfix	Medium	Fixes embeddinggemma compatibility with ChromaDB 1.5.x for semantic search. Fixes embeddinggemma compatibility with ChromaDB 1.5.x for semantic search. Source: llm_adapter@2026-06-06 Confidence: high	—
Bugfix	Medium	Fixes `diary_write` to accept `content` alias and restore missing‑parameter diagnostic. Fixes `diary_write` to accept `content` alias and restore missing‑parameter diagnostic. Source: llm_adapter@2026-06-06 Confidence: high	—
Bugfix	Medium	Fixes explicit‑vector backends to handle single‑document inputs correctly. Fixes explicit‑vector backends to handle single‑document inputs correctly. Source: llm_adapter@2026-06-06 Confidence: high	—
Bugfix	Medium	Fixes `mcp_server` import to no longer recreate `~/.mempalace` when privacy kill‑switch is set. Fixes `mcp_server` import to no longer recreate `~/.mempalace` when privacy kill‑switch is set. Source: llm_adapter@2026-06-06 Confidence: low	—
Bugfix	Low	Prevents `mcp_server` import from recreating `~/.mempalace` when privacy kill‑switch is active. Prevents `mcp_server` import from recreating `~/.mempalace` when privacy kill‑switch is active. Source: granite4.1:30b@2026-06-06-audit Confidence: low	—

Full changelog

v3.4.0 — pluggable backends, Docker, and reliability fixes

Features

Pluggable vector backends — Qdrant, pgvector, and sqlite_exact alongside the default ChromaDB, selectable via MEMPALACE_BACKEND / --backend.
Docker images (CPU + GPU) for the MCP server and CLI.
mempalace migrate-wings — one-time migration that normalizes legacy wing names (strip leading/trailing separators) so pre-upgrade palaces stay discoverable. See docs/recovery/wing-name-migration.md.
Known-systems lexicon keeps multi-word product names atomic in entity detection.

Fixes

embeddinggemma (the default model) now works with ChromaDB 1.5.x — semantic search was silently failing on fresh installs.
Prevent silent data loss from drawer_id hash collisions.
Importing mcp_server no longer recreates ~/.mempalace (respects the privacy kill-switch).
diary_write accepts a content alias and restores the missing-parameter diagnostic.
Explicit-vector backends handle single-document inputs correctly.

Infrastructure

PyPI publishing via GitHub Actions Trusted Publishing (OIDC), gated by manual approval.

View diff on GitHub

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