How the engineer behind Claude Cowork actually uses Claude | Felix Rieseberg (Anthropic)

What It Covers

Felix Rieseberg, engineering lead for Claude CoWork, Claude Code, and Claude desktop apps at Anthropic, demonstrates practical Claude workflows including a $19 hardware approval button, live artifact dashboards, and using email as personal inventory data — showing how abstraction layers unlock Claude's real productivity potential.

Key Questions Answered

• •Abstraction layering: When using Claude, repeatedly ask "how can Claude handle this instead of me?" at each step. Rieseberg caught himself manually entering furniture dimensions mid-task, stopped, and instead told Claude to extract purchase data from his email receipts — eliminating the manual step entirely and arriving at a richer result faster.
• •Email as personal inventory: Connect Gmail to Claude CoWork and query purchase history to build structured inventories of furniture, clothing, or any category of owned items. Rieseberg used this to populate a 3D interactive floor planner with actual furniture dimensions pulled from order confirmation emails, requiring zero manual data entry.
• •Model selection heuristic: Default to Claude Sonnet 4.6 for most tasks. Switch to Opus only when the problem itself is poorly scoped — meaning when you cannot clearly articulate what you actually want. Well-defined tasks like "extract floor plan units from this document" do not require Opus-level reasoning capacity.
• •Live artifacts with connectors: Build auto-refreshing dashboards in Claude CoWork by combining the "live artifact" prompt keyword with pre-authenticated connectors (Gmail, Spotify, Notion, Calendar). The refresh button pulls current data without re-entering API keys. Use this for daily briefings that include meeting prep, recent Slack activity from attendees, and relevant context.
• •$19 hardware Claude buddy: Purchase any Bluetooth-enabled IoT device, connect it via Claude desktop's developer mode hardware buddy feature, and offload Claude permission approvals to a physical button. Claude Code built the full firmware in one shot with zero corrections, enabling background async work without watching the screen.