Meta's latest AI assistant Muse has surpassed OpenAI's ChatGPT in app store rankings, marking a significant competitive shift in the consumer AI market. However, the platform's rapid ascent has triggered a strategic divide among e-commerce giants, with Amazon actively blocking Muse from accessing its shopping ecosystem while Shopify has opened its doors to the agent, setting the stage for a new battleground over AI-driven commerce. The divergent responses underscore a fundamental question about the future of autonomous shopping: who controls the customer relationship when AI agents make purchasing decisions on behalf of users. Amazon's move to restrict Muse access signals the company views the platform as a competitive threat to its direct customer engagement, while Shopify's embrace of the agent may be positioned as a way to level the playing field for smaller merchants and differentiate itself from Amazon's closed ecosystem approach. In related industry developments, Grok 4.7 has launched, new frameworks for AI liability are gaining traction, and cross-laboratory safety testing has become a focus—signals that as agent technology advances rapidly, questions of accountability and safety are increasingly pressing alongside fierce market competition.