Latent Space: Felix Rieseberg on Claude Cowork Architecture — VM Sandbox, Browser Vision, and Markdown Skills System

Latent Space·high signal

Felix Rieseberg (core Electron maintainer, ex-Slack) leads Claude Cowork at Anthropic — a desktop app running Claude Code inside a lightweight VM with safety guardrails, targeting non-technical users. Key architecture: VM safety sandbox + Chrome integration for browser vision tasks + Markdown-based Skills system for reusable agent workflows. The episode's central thesis is that 'execution is now cheap' — teams should build multiple working candidates and test empirically rather than over-specifying, a direct inversion of traditional product-spec discipline.