memory-bridge

Cross-project memory sharing for Claude Code and Cowork. Stop teaching Claude the same thing twice.

Claude's memory is project-isolated. Teach it "use pnpm" in project A, repeat yourself in project B. memory-bridge adds a shared layer — namespaces — between global and project scope. Solves #36561 and #39195.

Global      ~/.claude/CLAUDE.md                      (Claude native)
Namespace   ~/.claude/shared-memory/<ns>/*.md         (memory-bridge)
Project     ~/.claude/projects/<proj>/memory/*.md     (Claude native)

Install

Claude Code (one command)

claude mcp add memory-bridge -- uvx claude-memory-bridge

Done. No clone, no config files. Requires uv (curl -LsSf https://astral.sh/uv/install.sh | sh).

Cowork Desktop

Add to your config file (Settings > Developer > Edit Config):

{
  "mcpServers": {
    "memory-bridge": {
      "command": "uvx",
      "args": ["claude-memory-bridge"]
    }
  }
}

Requires uv. Then restart Cowork.

Manual install (advanced)

git clone https://github.com/LewenW/claude-memory-bridge.git
cd claude-memory-bridge
pip install -e .
python scripts/install.py

Tools

Tool	What it does
search_memories	Search across all projects and shared namespaces
promote_memory	Move a memory from project to shared namespace
sync_memory	Copy a memory to specific projects
list_shared_memories	Browse namespace contents
manage_namespaces	Create, delete, subscribe, unsubscribe
get_memory_health	Find duplicates, stale entries, broken indexes

Quick start

In a Claude Code or Cowork session:

# Create a namespace
"Create a shared namespace called 'frontend' for React conventions"

# Share knowledge
"Promote 'Use pnpm, not npm' to the frontend namespace"

# Subscribe a project
"Subscribe my dashboard project to the frontend namespace"

# Search across everything
"Search memories for pnpm"

Client compatibility

Client	Auto	Manual
Claude Code (CLI)	Yes	Yes
Cowork — Code mode	Yes	Yes
Cowork — Cowork mode	:(	Yes — mention "memory-bridge" or tool name

Cowork mode loads the MCP tools but doesn't inject server instructions, so Claude won't use them unprompted. Workaround: say "use search_memories" or mention "memory-bridge". This will work automatically once Cowork supports MCP instructions.

How it works

• Reads/writes Claude's native ~/.claude/projects/*/memory/*.md directly — no database
• Shared memories in ~/.claude/shared-memory/<namespace>/
• registry.json tracks namespace subscriptions
• Word-boundary TF-IDF search scoring
• Trigram Jaccard similarity for duplicate detection (threshold 0.45)

Uninstall

claude mcp remove memory-bridge    # Claude Code

Or remove the memory-bridge entry from your Cowork config file.

Project structure

src/memory_bridge/
├── server.py              MCP server, 6 tools
├── config.py              Paths + constants
├── models.py              Dataclasses
├── store/
│   ├── base.py            MemoryStore interface
│   └── filesystem.py      File I/O + keyword search
└── engine/
    ├── retriever.py       Cross-project search
    ├── promoter.py        Project → namespace promotion
    ├── namespace_manager.py   Namespace CRUD
    └── health_analyzer.py     Dedup + staleness + index audit

License

MIT