About Zed MCP Server Threadbridge
Zed MCP Server Threadbridge is an MCP server published by dereklei12 in the Search category: model Context Protocol Server for persistent AI memory with hybrid semantic search on Zed.
The repository has 8 stars and 3 forks, with the last commit 6 months ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.
Install
git clone https://github.com/dereklei12/zed-mcp-server-threadbridgeThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
Tools (3)
load_threadLoad saved conversation context for a project
Parameters not published.
save_threadSave current conversation context
Parameters not published.
search_memorySemantic search across project memory
Parameters not published.
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README
ThreadBridge MCP Server for Zed
A Zed extension that provides persistent AI memory through the Model Context Protocol.
ThreadBridge remembers context across conversations using hybrid semantic search (Arctic Embed + BM25 + RRF) with a cognitive decay model (BLL).
Retrieval Benchmark
Runs entirely on local CPU with zero cloud dependency.
Config: Arctic Embed M (768d) + BM25 hybrid + RRF fusion + BLL reranker (30%). Top-20, threshold 0.15.
LoCoMo (Session-level, 1986 QA pairs)
LongMemEval (Session-level, 500 questions)
Per-question-type breakdown (LoCoMo)
Metric definitions
- Recall@K (fractional): fraction of correct sessions retrieved in top-K unique sessions. Standard IR recall.
- Recall_all@K (Ra@K): binary — 1.0 iff all correct sessions are in top-K, else 0.0. Used by MemGAS for direct comparability.
- NDCG@K: normalized discounted cumulative gain at session level.
- MRR: mean reciprocal rank of first correct session.
Notes
- LoCoMo dataset contains 10 conversations / 1986 QA pairs (Maharana et al. 2024).
- Baseline numbers from MemGAS Table 2&3 (recall_all definition confirmed via source code).
- LongMemEval baseline from Table 2&3 (ICLR 2025), using Stella V5 + dense retrieval.
- ThreadBridge reports both recall variants for transparency. The
Ra@10column is directly comparable to MemGAS. - End-to-end LLM-Judge scores (Hindsight, MemR3, Zep, Mem0) evaluate a different pipeline and are not comparable to retrieval-layer metrics.
Installation
From Extension Marketplace
- Open Zed
- Go to Extensions (cmd+shift+x)
- Search for "ThreadBridge"
- Click Install
ThreadBridge is now available in the Zed Extension Marketplace. The extension will automatically download the appropriate binary for your platform.
Local Installation (Dev)
Dev extensions are compiled locally by Zed, so this installation method requires Rust via rustup. Rust is not required when installing ThreadBridge from the Zed Extension Marketplace.
-
Clone this repository:
git clone https://github.com/dereklei12/zed-mcp-server-threadbridge.git -
In Zed, open the command palette (cmd+shift+p) and run zed: install dev extension, then select the cloned directory.
-
The extension will automatically download the
mcp-threadbridgebinary from GitHub Releases on first use.
MCP Tools
| Tool | Description |
|---|---|
load_thread |
Load saved conversation context for a project |
save_thread |
Save current conversation context |
search_memory |
Semantic search across project memory |
Configuration
Optional settings in Zed:
project_path— project directory for memory storage (default: current working directory)storage— where to store thread data:"true"(default): local, at<project_path>/.threadbridge/"false": global, at~/.threadbridge/projects/- absolute path: custom location
Supported Platforms
- macOS (Apple Silicon)
- Linux (x86_64)
- Windows (x86_64)
License
MIT
README copy captured when this server was indexed; it may lag the repository. The original is authoritative.