Chrome extension: computer screenshot with save_to_disk: true reports success but writes no file

What's wrong

Calling the Claude in Chrome computer tool with action: "screenshot" and save_to_disk: true returns a success message and a capture ID, but no file is written and no path is returned. There is no way to retrieve the image as a file afterwards.

What should happen

Either the tool returns the path it wrote to, or, if writing to disk is not supported, save_to_disk is rejected rather than reported as successful.

Steps to reproduce

1. Open a tab on https://example.com.
2. Call computer with action: "screenshot" and save_to_disk: true.
3. The result is Successfully captured screenshot (1568x772, jpeg) - ID: ss_2703tar70.
4. Search the filesystem for that ID and check the Downloads folder. Neither holds a matching file.

Why it matters

The success message reads as a saved file, so the following step is spent hunting for something that was never created. Reproduced on two Windows machines by two people, so it does not appear to be one local configuration.

Is this a regression?

Not known to have worked. Observed on 8/17/2026 and again on 8/22/2026.

Environment

• Claude Code 2.1.237 (running from the Claude desktop app)
• Claude in Chrome extension 1.0.85
• Chrome 151.0.7922.173
• Windows 11