Claude in Chrome's Side Panel Now Runs Full Cowork Sessions: Start a Task in Your Browser, Finish It on Your Phone

Claude in Chrome's side panel now runs a full Cowork session — a task started in the browser can be picked up and finished right on your phone.

Marcus Ide · September 10, 2026

Anthropic announced on August 12, 2026, that the side panel in the Claude in Chrome browser extension now runs a full Claude Cowork session. Your conversation history, configured skills, and connected connectors in the browser now share the same context as the desktop, web, and mobile apps — a task you start in a browser tab can be picked up and continued or finished on your phone, with no need to re-explain what you're working on. The feature is available today on Max and Team plans, and is...

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Useful Resources

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Glossary

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Golden Set

A fixed set of real tasks whose correct outputs have already been approved by a human, re-run after every prompt edit or model change so the difference between the old and new output shows whether the change actually helped instead of just feeling better.

A golden set is a small, fixed collection of real tasks — usually twenty to fifty — where someone has already reviewed the output and confirmed it...

intermediate

Anomaly Detection

Asking Claude to comb through a batch of data and flag whatever clearly deviates from the normal range, attaching a possible direction for the cause — this is the act of finding what looks off, and nothing more. It doesn't include judging whether that oddity is actually an error; that judgment gets handed to someone actually capable of making it.

<a href="/en/glossary/core-concepts/anomaly-detection/">Anomaly Detection</a> refers to asking Claude to find items within a batch of data that...

beginner

Chain of Thought

Ask Claude to write out the intermediate reasoning steps within a single reply, instead of jumping straight to the conclusion — you don't just see the answer, you see how it was derived, which means you can also see exactly which step went wrong.

<a href="/en/glossary/core-concepts/chain-of-thought/">Chain of Thought</a> means asking Claude to write out its reasoning step by step within a...

beginner

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