ContextBridge
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@ContextBridgeexport my current session as 'fix login bug' snapshot"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
ContextBridge
在多个 AI 编程 IDE 之间传递会话上下文的轻量 MCP 工具。 把当前对话 + git diff 打包成快照,切换工具时一键 import,接手的 AI 立刻懂"前因后果"。
ContextBridge 解决一个非常具体的问题:你在 Cursor / Claude Code / Codex / Gemini CLI 之间切来切去时,每次都要跟新工具重新解释"我刚改了什么、现在在做什么"。它把当前会话导出成一份可移植的快照,在另一边 import 进来,接着干。
双入口:既能作为 MCP server 被 AI IDE 直接调用,也能作为命令行工具独立使用
全本地:sqlite + JSON 文件存储,不联网,不上传,隐私完全可控
零常驻:CLI 用完即走,MCP server 仅在 host 进程内运行,没有后台服务
自动采集:在 Claude Code 下自动读取
~/.claude/projects/会话,无需手动粘贴
目录
Related MCP server: Conversation Handoff MCP
安装
需要 Python 3.10+。
git clone https://github.com/luanyanchengdeqiong/contextbridge.git
cd contextbridge
# 推荐:用 uv
uv venv && uv pip install -e ".[dev]"
# 或者纯 pip
python -m venv .venv
source .venv/bin/activate # Windows: .venv\Scripts\activate
pip install -e ".[dev]"验证安装:
cb --help # 应列出 export / list / show / import / clear快速开始
场景:你在 Claude Code 里干了一阵,想切到 Cursor 接着做。
# 1. 在 Claude Code 侧,导出当前会话(自动读取本地 session)
cb export -t "把登录改成 OAuth"
# 2. 切到 Cursor 后,打印 handoff 块粘贴进新对话
cb import # 默认取最新一条粘贴进去的内容长这样(节选):
# Context Handoff — 把登录改成 OAuth
source IDE: claude_code cwd: /path/to/repo created: 2026-07-29T...
## user
需要把登录改成 OAuth...
## assistant
我已经把 session.py 改好了,接下来要...
## Current git diff
```diff
diff --git a/src/session.py b/src/session.py
...
接手的 AI 一眼看到完整上下文 + 当前代码改动。
---
## 接入 MCP host
接入后,AI 能在自己会话里直接调用 `cb_export` / `cb_import`,无需切到终端。
### Claude Code
编辑 `~/.claude.json`(或项目根 `.mcp.json`):
```json
{
"mcpServers": {
"contextbridge": {
"command": "cb",
"args": ["serve"]
}
}
}Cursor / Claude Desktop / 其他 MCP host
Settings → MCP → Add Server,填入同样 JSON。Windows 上若 cb 不在 PATH,改用绝对路径:
{
"mcpServers": {
"contextbridge": {
"command": "C:\\path\\to\\contextbridge\\.venv\\Scripts\\cb.exe",
"args": ["serve"]
}
}
}Windows 注意:
cb serve启动的 git 子进程已做 handle 隔离处理,不会因继承 stdio 管道而挂起。
CLI 用法
cb export [-t TITLE] [-c CONVERSATION_JSON] [--no-diff] # 导出快照
cb list [-n LIMIT] # 列出快照
cb show <ID> # 打印某条快照 JSON
cb import [<ID>] # 打印 handoff 块(默认最新)
cb clear [DAYS] # 清理 N 天前的(默认 30)显式传入对话(非 Claude Code 环境,如从 GUI host 拷贝):
cb export -t "修复登录 bug" -c '[{"role":"user","content":"登录总报 500"}]'ID 支持前缀:cb_list 显示的是 8 位短 id,import / show 既接受完整 UUID 也接受短前缀。
MCP 工具
工具 | 作用 |
| 导出当前上下文为快照;在 Claude Code 下自动采集,其他 host 可传 |
| 列出快照(显示短 id、IDE、时间、标题) |
| 按 id/前缀导入,返回 Markdown handoff 块;省略 id 取最新 |
| 按天数清理旧快照 |
数据存储
~/.contextbridge/
├── index.db # sqlite 索引 + FTS5 全文检索(按标题)
└── snapshots/ # JSON 快照文件,可直接查看/分享/删除
└── 2026-07-29T080000Z_feature-x_<id8>.json用
CONTEXTBRIDGE_HOME环境变量覆盖存储目录快照单文件上限 1MB(超长对话会被截断)
存储采用进程级单例连接,长生命周期下不会泄漏 sqlite 连接
项目结构
contextbridge/
├── src/contextbridge/
│ ├── server.py # FastMCP server + 4 个 cb_* 工具
│ ├── cli.py # Typer CLI
│ ├── store.py # sqlite 存储 + FTS5 + 前缀查找
│ ├── render.py # 共享的 handoff 渲染(CLI/MCP 复用)
│ ├── gitutils.py # Windows 安全的 git diff
│ ├── truncation.py # 对话/diff 截断
│ ├── schema.py # pydantic 模型
│ └── adapters/ # IDE 适配器(Claude Code / Generic)
├── tests/ # 38 条测试
├── docs/
│ ├── install.md
│ └── architecture.md
└── pyproject.toml测试
pytest覆盖:存储 CRUD、前缀查找、孤儿行兜底、FTS 检索、CLI 各命令、MCP server 工具、Claude Code 适配器、渲染格式。
设计文档
docs/install.md — 详细安装说明
docs/architecture.md — 架构与设计决策
License
MIT
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