Cursor Composer 2.5, Vercel Sandbox Agents, and How Engineers Actually Use Claude Code

Three interconnected signals today: Cursor shipped a meaningful agent upgrade, Vercel made it easier to run Claude agents in sandboxed environments, and Thariq Shihipar from Anthropic gave a rare look at how engineers actually use Claude Code day-to-day — HTML over markdown, micro-apps for specs, and a reframe of what the PM role even means when you have compute to allocate.