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eidetic-works/nucleus-mcp

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Nucleus MCP server by Eidetic Works — persistent memory and governance for Claude, Cursor, Windsurf — file-based, no vendor lock-in.

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MCP

eidetic-works/nucleus-mcp

Added 26 June 2026

#agent-os#ai-agents#ai-tools#claude#cursor#mcp#mcp-server#model-context-protocol
Catalogue record, not a reviewed recommendation. This record can include automatically collected descriptions and setup details. Confirm important claims with the original source. Explore source-reviewed tools.

Overview

An MCP server that provides persistent memory and governance for AI coding assistants including Claude, Cursor, and Windsurf. Uses file-based storage to retain context and rules across sessions, avoiding vendor lock-in. Written in Python and open source.

Best for

Best for
Developers using Claude, Cursor, or Windsurf who want local, persistent memory and governance without vendor lock-in

Use cases

  • Retain long-term project context across Claude, Cursor, and Windsurf sessions
  • Enforce coding guidelines and governance rules consistently in AI interactions
  • Store session memory locally without relying on external cloud services

How to use

Install

pip install nucleus-mcp

Tools exposed

  • eu-dora
  • sg-mas-trm
  • us-soc2
  • global-default

Clients listed in this record (not verified here)

Claude Desktop, Claude Code, Cursor, Windsurf, ChatGPT

Notes

3 stars on GitHub. Last updated 2026-06-26. Licensed MIT.

Pros

  • Vendor-independent, works across multiple AI coding tools
  • Simple file-based persistence with no external dependencies
  • Open source Python implementation for easy customization

Cons

  • Low adoption (3 stars) suggests limited community and testing
  • File-based storage may not scale well for large teams or complex projects
  • Requires manual setup and configuration by the developer

Open-source & AI alternatives

Swap-in tools that solve the same job. Weigh the trade-offs before you commit.

Pairs with

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