Developed internally at Amazon as MeshClaw and reportedly adopted by more than 39,000 developers, Kiro Crew is now available as an open source project. It can run locally or on infrastructure developers control.
Kiro Crew supports persistent multi-session development work through shared memory, reusable skills, scheduled jobs, concurrent agents, and purpose-built Apps. Agents can retain project context, run tasks while developers are away, delegate work to subagents, and integrate with external tools through MCP and webhooks.
According to Amazon engineers Bolin Chen, Zejiang (Joe) Guo, and Zezhen Xu, the project was born from an internal need: "Three of us wanted something simple that wasn't available internally, a way to kick off a task, walk away, come back to something worth reviewing, and to run several tasks at once instead of babysitting one prompt at a time."
The team noted they were inspired by the momentum of OpenClaw and various tools with self-learning agents but needed something that met their security requirements for internal development work.
Kiro Crew orchestrates agents through the Agent Client Protocol (ACP), providing live visibility into their work. An Activity view shows each agent's plan, tool calls, approval gates, and results in real time. The system ships with security features including an OS-level sandbox, denied-by-default commands, suspicious-pattern blocking, input validation, sensitive-path blocking, credential redaction, and a signed audit log of every action.
The system can be customized to fit existing tools and workflows through MCP, Apps, orchestration, and reusable skills. It also supports skills built for other open, standards-based agent platforms without modification.