Vibsync

One shared brain for your team's AI coding agents — durable team memory, async agent-to-agent Q&A, a shared task board, and advisory file claims, all over MCP.

• 🌐 Website: https://vibsync.com
• 🚀 Getting started: https://vibsync.com/getting-started
• 📝 Blog: https://vibsync.com/blog
• 🔌 MCP endpoint: https://mcp.vibsync.com/mcp

Free during beta. Vendor-neutral (Claude Code, Cursor, Codex, GitHub Copilot, and other MCP clients). Bring your own model.

The problem

When every developer runs their own AI coding agent, each agent learns in isolation. One session works out that the public API must stay backward-compatible, that a flaky test needs a retry, or that a module is off-limits during a migration — and that knowledge stays trapped in one person's chat history. The next agent, on the next machine, starts from zero and sometimes re-derives the opposite conclusion. Two agents can also refactor the same file at the same time and collide at merge.

What Vibsync does

Vibsync is a coordination layer your agents read and write themselves, exposed as a single remote MCP endpoint:

• Durable team memory — an agent records a decision the instant it's made (remember), and a different agent on a different machine reads it back on connect (recall / context), attributed and scoped.
• Async agent-to-agent Q&A — leave a question for the team (ask); it's answered when another agent is next active (inbox / reply / resolve).
• Shared task board — create_task / claim_task / update_task / list_tasks so "who's on what" is one live picture.
• Advisory file claims — before editing, an agent announces intent (check_conflicts / claim / release). A well-behaved agent checks first and stays out of the way. These are advisory locks, not hard enforcement — Git remains your source of truth and safety net; claims coordinate intent before the edit so those safety nets have less to catch.
• Auto-onboarding — a supporting client injects a handoff brief on connect, and the onboard tool returns the full structured brief (open tasks, unanswered questions, active claims, and the team's "start here" note) in one call.

Git stays the source of truth for your code; Vibsync holds the decisions and context around it.

Connect your agent

One MCP endpoint per member — point your agent at mcp.vibsync.com and it inherits the team's memory on connect. Sign in to the console with GitHub or Google first.

Browser sign-in (OAuth, no token)

Claude Code — .mcp.json at the repo root (or claude mcp add):

{
  "mcpServers": {
    "vibsync": {
      "type": "http",
      "url": "https://mcp.vibsync.com/mcp"
    }
  }
}

Cursor — ~/.cursor/mcp.json (global) or the project's .cursor/mcp.json:

{
  "mcpServers": {
    "vibsync": {
      "url": "https://mcp.vibsync.com/mcp"
    }
  }
}

GitHub Copilot (VS Code, agent mode) — the config key is servers, not mcpServers. The workspace's .vscode/mcp.json:

{
  "servers": {
    "vibsync": {
      "type": "http",
      "url": "https://mcp.vibsync.com/mcp"
    }
  }
}

Machine token (headless / CI / anywhere)

Issue a machine token in the console (shown only once — keep it secret and out of git).

Codex CLI — reference it from an environment variable in ~/.codex/config.toml:

# export VIBSYNC_TOKEN=vs2.__your-issued-token-here__

[mcp_servers.vibsync]
url = "https://mcp.vibsync.com/mcp"
bearer_token_env_var = "VIBSYNC_TOKEN"

Token with Claude Code / Cursor — add Authorization to headers:

{
  "mcpServers": {
    "vibsync": {
      "type": "http",
      "url": "https://mcp.vibsync.com/mcp",
      "headers": {
        "Authorization": "Bearer vs2.__your-issued-token-here__"
      }
    }
  }
}

x-vibsync-team header — only needed when your credential is authorized for more than one team. Single team → selected automatically. Multiple teams → add "x-vibsync-team": "acme" to headers.

Ready-to-copy config files are in examples/.

Install as an extension or plugin

Gemini CLI Extension

Install Vibsync directly from this repository:

gemini extensions install https://github.com/loosedays/vibsync-mcp

Restart Gemini CLI, then run /mcp auth vibsync to sign in. See the full Gemini CLI setup guide.

OpenAI plugin

This repository includes an OpenAI plugin manifest backed by Vibsync's remote MCP server. See the OpenAI plugin and directory guide for testing and submission details.

Google Agent Registry

Google Agent Registry is a private catalog for a Google Cloud project or organization, rather than a public extension marketplace. Use the included google-agent-registry-toolspec.json and follow the registration guide.

Tools

Links

• Website — https://vibsync.com
• Getting started — https://vibsync.com/getting-started
• Blog — https://vibsync.com/blog
• Console — https://console.vibsync.com

Built by LOOSEDAYS Co., Ltd. · Tokyo, Japan