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Felix Rieseberg
Builder

Felix Rieseberg

@felixrieseberg

1 App · 2 Intel

Felix Rieseberg is a Member of Technical Staff at Anthropic, where he leads engineering for Claude.ai, Cowork, and Code Desktop. He previously held engineering and leadership roles at Notion, Stripe, Slack, and Microsoft, and is a longtime maintainer of the Electron open-source framework. He holds an MSc from the University of Oxford's Internet Institute and is based in San Francisco.

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Apps

Language Model Builder(languagemodelbuilder.com)

Interactive macOS textbook plus an on-device workbench for training your own small LLM.

EducationFreeOtherbuilt by @felixrieseberg

Intel

How to be more ambitious: A tutorial for humans with models(felixrieseberg.com)

A Claude engineering lead breaks down 'ambitious' AI use into altitude, depth and range, with examples like delegating ongoing crash-free maintenance instead of single bug fixes. Practical guidance on scoping tasks for models.

AI Toolsbuilt by @felixrieseberg
Quoting Felix Rieseberg(simonwillison.net)

Anthropic's Cowork moves both model inference and its sandbox VM to the cloud, with a separate environment per session. The desktop app now only handles file access tool calls, which removes the local VM's battery cost and keeps long-running work alive when the laptop closes.

AI Agents