Today felt like stack-shaping infrastructure and agent tooling day: OpenAI dropped the MRC networking protocol for AI clusters while Anthropic expanded on multiple fronts with AWS GA, an Agent View, and higher limits. LangChain shipped a full agent stack, LiteLLM open-sourced safer agent sandboxes, and Codex added background Chrome control—all against the backdrop of urgent RSC/Next.js vulns and falling voice API prices.