In a major policy shift, Amazon has opened the doors to third-party AI coding assistants after a wave of internal discontent. The e-commerce giant now grants its tens of thousands of developers direct access to Anthropic's Claude Code and soon OpenAI's Codex—tools that rival its own in-house agentic coding service, Kiro. This move follows a mounting rebellion where employees voiced frustration over being forced to use Kiro while craving the capabilities of more advanced external tools. The change, effective May 12, transforms how Amazon developers build software, promising greater flexibility, tighter security on AWS, and a shift in engineering culture. Here are ten essential things you need to know about this pivotal decision.
