Code w/ Claude London event: Rethinking the developer experience

Code w/ Claude 伦敦活动：重塑开发体验

Anthropic announced two Claude Managed Agents capabilities at Code w/ Claude London: self-hosted sandboxes in public beta and MCP tunnels in research preview, with Spotify, Base44, and Legora already using them.

Why it matters: Official Anthropic product update with two concrete Claude Managed Agents capabilities. HKR-H/K/R pass, but this is a developer-tooling update rather than a major model release, so it lands at 78.