This last week has shown me something I already suspected but hadn’t quite felt at full intensity: Claude Cowork is an extraordinary instrument for anyone who lives inside office documents.
The setup is simple but the implications are not. You create a project folder, point Cowork at it, and from that moment the work has a home. The folder holds the files, the instructions, the memory. If you keep it local and disciplined, Cowork stays anchored to what’s in there. You can extend it with connectors and browsing if you need to, but you don’t have to.
That makes it a little like Google’s NotebookLLM in spirit if not in mechanism. NotebookLM walls itself off and answers only from the sources you give it. Cowork doesn’t enforce that fence, but you can choose to work as though it does. Define the sources, own the inputs, and the agent will work from those alone. The difference is that Cowork will then generate Word documents, Excel workbooks and PowerPoint decks from those sources without blinking.
If you’re disciplined about what goes into that folder, the results are remarkable. I’d call it relentless productivity. You will produce material faster than you can review it. You will take on things you would never have attempted before, simply because the heavy lifting disappears. The old rule still applies, of course. Garbage in, garbage out. But the corollary is equally true: good inputs, clear guidance, focused context and the output is genuinely impressive.
The downside, and it is a real one, is speed. Things come back so fast that you need to deliberately build in review pauses. Without them, you can drift. The work won’t go badly wrong, but it can go subtly off course in ways that only become obvious when someone else reads it.
The hallucination risk drops too, provided you keep the project tight. When Cowork is working from your documents rather than wandering the open web, it stays grounded. It still brings its own expertise to the task. It knows project planning, Gantt charts, development sprints, data visualisation. Tell it you need that timeline as a Gantt chart in Excel and it will produce one. Tell it to break a plan into implementation sprints for a CRM rollout and it will do that too. But it does all of this in the context of what you are actually trying to accomplish, not what it thinks you might mean.
At times this week I felt like Mickey Mouse in Fantasia, conducting the brooms. Buckets of water, back and forth, back and forth. The magic is real. But Mickey’s lesson is also real: if you stop paying attention, things get away from you.
So we remain vigilant. The quality of what we share still matters. The review step is not optional. And the cycle, if we let it slip, is the same one it always was.
I am both blown away and physically drained. It is good that the weekend has arrived.
Claude Cowork: https://www.anthropic.com/product/claude-cowork
Google Notebook LLM: https://notebooklm.google/
Fantasia - The Sorcerer’s Apprentice - [youtu.be/B4M-54cEd…