doobidoo/mcp-memory-service v8.66.0

v8.66.0 - Critical Bug Fixes for Storage Backend & Quality System

on GitHub

Critical Bug Fixes for Storage Backend & Quality System

This patch release resolves three critical bugs affecting storage backend functionality and the quality rating system.

Fixed

Quality System - User Ratings Persistence (Issue #325)

• Problem: rate_memory showed success but ratings were not persisted to database
• Root Cause: Handler passed entire metadata dict (with tags as string) to update_memory_metadata(), which expects tags as list → silent failure
• Fix: Only pass quality-related fields and check return value
• Impact: User ratings now persist correctly to database
• File: src/mcp_memory_service/server/handlers/quality.py

Storage Backend - Time-based Deletion Methods (Issue #323)

• Problem: Handlers existed but storage methods were missing from all backends, causing AttributeError
• Implementation:
  • Added delete_by_timeframe(start_date, end_date, tag) to all backends
  • Added delete_before_date(before_date, tag) to all backends
  • SQLite-vec: Uses soft-delete for tombstone support
  • Cloudflare: D1 batch queries with proper retry patterns
  • Hybrid: Delegates to SQLite + queues for sync with Cloudflare
• Impact: Time-based memory cleanup now works across all storage backends
• Files: src/mcp_memory_service/storage/{base,sqlite_vec,cloudflare,hybrid}.py

Debug Tool - Backend-Agnostic Exact Match (Issue #324)

• Problem: exact_match_retrieve() used ChromaDB-specific API, causing empty results with SQLite-vec
• Implementation:
  • Added get_by_exact_content(content) method to all storage backends
  • SQLite-vec: SQL WHERE content = ? AND deleted_at IS NULL
  • Cloudflare: D1 query with retry patterns
  • Hybrid: Delegates to primary storage
  • Three-tier fallback in debug.py for backwards compatibility
• Impact: Debug tool now works with all storage backends
• Files: src/mcp_memory_service/storage/{base,sqlite_vec,cloudflare,hybrid}.py, src/mcp_memory_service/utils/debug.py

What Changed

All three storage backends (SQLite-vec, Cloudflare, Hybrid) now support the complete storage API. This ensures consistent behavior across all backend configurations.

Full Changelog: v8.65.0...v8.66.0

Installation:

pip install --upgrade mcp-memory-service

PyPI: https://pypi.org/project/mcp-memory-service/8.66.0/