A2CR
Persist WorkBaton checkpoints and WorkStash notes so one agent can hand off context cleanly to the next in long solo builds.
Overview
A2CR is an MCP server for the Build phase that saves WorkBaton checkpoints and WorkStash notes so AI agents can hand off work with persisted context.
What is this MCP server?
- Stdio MCP server (PyPI a2cr-mcp v0.1.6) for WorkBaton checkpoints
- WorkStash notes API for durable handoff context between agent runs
- Requires A2CR_API_KEY from the a2cr.app dashboard
- Optional A2CR_BASE_URL override (default https://a2cr.app)
- Repository: github.com/a2cr/a2cr
- Manifest version 0.1.6
- PyPI identifier: a2cr-mcp
- Default service URL: https://a2cr.app
What problem does it solve?
Long agent sessions lose thread when you restart, swap agents, or split tasks—and you waste hours re-loading context from chat logs.
Who is it for?
Builders running Superpowers-style stacks or multi-agent pipelines who need explicit checkpoint + note artifacts outside the chat window.
Skip if: Developers who only work in single-session localhost coding with no handoff between agents or humans.
What do I get? / Deliverables
After configuring the MCP server with your API key, agents can write and read checkpoints and notes on a2cr.app for reliable multi-step handoffs.
- WorkBaton checkpoints retrievable across agent sessions
- WorkStash notes attached to handoff workflows
- Configured stdio MCP bridge to https://a2cr.app (or custom base URL)
Recommended MCP Servers
Journey fit
Multi-session agent work is core to the build phase when you are implementing features across days and tool switches. Agent-tooling covers MCP bridges that store state and notes specifically for agent-to-agent continuity, not generic file storage.
How it compares
Hosted checkpoint and notes MCP integration, not a local-only memory skill.
Common Questions / FAQ
Who is A2CR for?
Solo builders and small teams using MCP clients who split work across multiple agent sessions and need shared checkpoints and notes.
When should I use A2CR?
Use it when you are mid-build or mid-ship and need WorkBaton checkpoints or WorkStash notes before switching agents or pausing overnight.
How do I add A2CR to my agent?
Create an A2CR_API_KEY at a2cr.app, install the PyPI package a2cr-mcp (stdio), add the server to your MCP config, and optionally set A2CR_BASE_URL.