Google AI Studio Build Mode is corrupting my large source files when Gemini 3.7 Flash is asked to make a small, surgical code change. The files are approximately 13,000 lines each. Gemini is explicitly instructed to modify only the requested code and preserve everything else. Instead, after the edi…

Almost certainly related: [image] AI Studio development environment has become unreliable — is there an ongoing upgrade? Google AI Studio Over the last two hours, AI Studio has become effectively unusable for continued development of my existing application. …

I asked Gemini about it and here’s its official bug report I asked it to create (which I submitted to the in-app “Submit bug” option): Monaco Code Editor fails to inflate/decompress secondary transport chunks for workspace files, rendering raw zlib binary streams in the UI. Description: When open…

I found a practical workaround that may be useful for anyone affected by the binary file corruption issue. In my case, JPG files that were added or replaced directly inside the AI Studio workspace could become corrupted. However, I tested a different workflow: Add the correct JPG file directly …

Been experiencing the same thing, my project randomly broke out of nowhere and seemingly I found out one of the scripts in my project suddenly has a bunch of binary code and unreadable stuff in there and I tried fixing it only for the AI to continue breaking the project and I don’t want to move my p…

Hello, this issue has now been fixed. Could you please recheck on your end and let us know if you are still experiencing any file corruption issues?

In a new chat, I tested Gemini by asking it to remove a single comment in very bottom of the code. Before [image] After [image] It’s not fixed.

Definitely not fixed! Did you see my first reply in this thread?

Just confirmed with eng that the fix is now rolled out. If you still see it, please let us know.

Thanks for the fix. I verified it by having Gemini perform a surgical edit to remove a comment near the bottom of a large file again, and it worked cleanly without any corruption. Out of curiosity, what is the new file size/chunk limit for the Monaco editor in AI Studio now? My files might keep gro…

Not fixed for me. I did a forced-cache reset (Ctrl-Shift-R) of the page (no local overrides either): [image] When I closed/reopened the GAIS tab, I get that locked file issue so I can’t access the index.html file (and there’s a bun.lock file. Then I asked Gemini to unlock them (this has happened …

Gemini models corrupts large UTF-8 source files during surgical edits

Google AI Studio

DaveK August 27, 2026, 12:20pm 2

Almost certainly related:

It seems to occur for any kind of binary file, or I guess now anything that isn’t plain ASCII. It’s clearly a bug in the workspace environment, but we haven’t been able to get help from Google engineers yet.

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Gemini models corrupts large UTF-8 source files during surgical edits

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