doobidoo/mcp-memory-service v8.13.3

v8.13.3: Fix MCP Memory Tools (Critical)

on GitHub

v8.13.3 - Critical Patch Release

🚨 MCP Memory Tools Restored

This critical patch fixes a v8.12.0 regression that completely broke all MCP memory operations.

🐛 Issue Fixed

All MCP Memory Tools Broken

• Error: KeyError: 'message' when calling any MCP memory tool
• Impact: MCP tools (store, retrieve, search, delete) completely non-functional since v8.12.0
• Symptoms: "Error storing memory: 'message'" in Claude Code/Desktop

🔍 Root Cause

v8.12.0 MemoryService Architecture Regression

The MemoryService refactoring changed response format:

• MemoryService returns: {success: bool, memory: {...}}
• MCP tools expect: {success: bool, message: str, content_hash: str}
• Result: MCP protocol tries to access missing 'message' field → KeyError

Why It Persisted:

• ✅ HTTP API works fine (doesn't need these specific fields)
• ✅ Integration tests passed (only tested HTTP, not MCP protocol)
• ❌ No MCP protocol integration tests to catch this

✅ Changes

mcp_server.py (lines 173-206):

• ✅ Transform MemoryService response to MCP TypedDict format
• ✅ Extract content_hash from nested memory object
• ✅ Add descriptive message field for MCP protocol
• ✅ Handle 3 response cases:
  • Failure: Return error message
  • Chunked: Return chunk count and hashes
  • Single: Return content hash

🎯 Result

MCP memory tools now work correctly:

• ✅ Proper message field in responses
• ✅ Correct content_hash extraction
• ✅ Descriptive error messages
• ✅ Chunked memory support maintained

⚠️ User Action Required

Restart MCP Server to Load Fix:

Claude Code:

# Type this command:
/mcp

Claude Desktop:

• Restart the application

This will:

1. Terminate old MCP server process (running broken code)
2. Start new MCP server with fix
3. MCP memory tools will work again

📊 Technical Details

• Introduced: v8.12.0 MemoryService architecture (#176)
• Affected: All MCP memory operations (store, retrieve, search, delete)
• HTTP API: Unaffected (uses different response format)
• Test Gap: Need MCP protocol integration tests

📚 Full Changelog

See CHANGELOG.md for complete details.

🔗 Related

• Previous: v8.13.2 (sync script fix)
• Regression from: v8.12.0 MemoryService architecture
• Issue: Need MCP integration tests (#190 related)