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

Anthropic engineering lead Felix Rieseberg demonstrated how he uses Claude Cowork to solve real-world problems, including turning 2D floor plans into interactive 3D walkthroughs, automatically tracking promises made on Twitter, and building a $20 hardware device that physically approves Claude actions with a button press. Rieseberg, who previously spent five years at Slack building developer tools, also shared his philosophy of never manually entering data Claude can find itself and explained why he judges Claude's output rather than reading its code. The episode covers practical applications like using email as a personal inventory database and when to use Opus versus Sonnet 4.6 based on problem scoping rather than technical complexity.

Felix Rieseberg is the engineering lead for Claude Cowork and Claude Code Desktop at Anthropic. He previously spent five years at Slack building developer tools. In this episode, Felix demonstrates how he uses Claude to solve real-life problems: analyzing floor plans to build interactive 3D house walkthroughs, automatically tracking promises he makes on Twitter, and building a $20 hardware device that physically approves Claude actions with a button press. Listen or watch on YouTube, Spotify, or Apple Podcasts What you’ll learn: How to use Claude Cowork to turn a 2D floor plan into an interactive 3D walkthrough where you can move furniture around The “go one abstraction layer up” philosophy: why you should never manually enter data Claude can find itself How to use your email as an inventory database for furniture, clothing, and personal purchases When to use Opus vs. Sonnet 4.6 hint: it’s about how well you can scope the problem, not technical complexity How live artifacts work and why they’re powerful for dashboards that refresh with real-time data from your connectors The product philosophy behind making latency delightful How to build your own $20 hardware device using Claude Code no hardware experience required Why Felix never reads the code Claude writes and judges it purely on output Brought to you by: Magic Patterns —Prototypes that look like your product Guru —The AI layer of truth In this episode, we cover: 00:00 https://www.youtube.com/watch?v=-tdNsYi8AXs Introduction to Felix Rieseberg 02:40 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=160s Felix’s role at Anthropic 03:25 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=205s The multiple tabs in Claude and why they exist 05:55 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=355s Using Claude Cowork to design a new house using floor plans 09:52 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=592s When to use Opus versus Sonnet 4.6 12:37 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=757s Building an interactive 3D furniture planner 14:30 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=870s Using your email as a source of truth for personal inventory 15:58 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=958s The anti-to-do list: going one abstraction layer up 23:14 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=1394s Introduction to live artifacts 26:02 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=1562s Building a personal dashboard with live data 28:37 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=1717s Being polite to Claude and why it matters for your humanity 30:28 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=1828s Claude interaction tips 32:33 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=1953s Looking at the daily dashboard 33:55 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2035s How live artifacts work with connectors 35:02 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2102s Redesigning the dashboard 37:55 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2275s The biggest gap: people don’t know what problems AI can solve 41:52 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2512s The reverse interview 42:30 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2550s Making latency delightful through asynchronous design 44:05 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2645s The redesigned dashboard 45:28 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2728s AI should free up your creative energy 46:44 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=2804s Building a $20 hardware Claude buddy 52:33 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=3153s Why kids are magical AI users 54:30 https://www.youtube.com/watch?v=-tdNsYi8AXs&t=3270s Recap and final thoughts Tools referenced: • Claude Cowork: https://www.anthropic.com/product/claude-cowork https://www.anthropic.com/product/claude-cowork • Claude Code: https://claude.ai/code https://claude.ai/code • Claude for Chrome: https://code.claude.com/docs/en/chrome https://code.claude.com/docs/en/chrome • Claude Desktop: https://claude.ai/download https://claude.ai/download • Live Artifacts: https://support.claude.com/en/articles/14729249-use-live-artifacts-in-claude-cowork https://support.claude.com/en/articles/14729249-use-live-artifacts-in-claude-cowork • Connectors Spotify, Gmail, Calendar, Notion : https://claude.ai/settings/connectors https://claude.ai/settings/connectors • Slack: https://slack.com/ https://slack.com/ Where to find Felix Rieseberg: Website: https://felixrieseberg.com/ https://felixrieseberg.com/ LinkedIn: https://www.linkedin.com/in/felixrieseberg/ https://www.linkedin.com/in/felixrieseberg/ X: https://x.com/felixrieseberg https://x.com/felixrieseberg GitHub: https://github.com/felixrieseberg https://github.com/felixrieseberg Where to find Claire Vo: ChatPRD: https://www.chatprd.ai/ https://www.chatprd.ai/ Website: https://clairevo.com/ https://clairevo.com/ LinkedIn: https://www.linkedin.com/in/clairevo/ https://www.linkedin.com/in/clairevo/ Production and marketing by https://penname.co/ https://penname.co/ . 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