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The temporary DLL files being flagged (.3aebfe470f372ef5-00000000.dll in your case) match the pattern reported in other issues. This appears to be a known issue with Windows Defender's heuristic/ML signatures flagging bundled CLI/GUI binaries.
Feel free to ignore if your specific case differs from these reports.
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github-actions commentedon Jan 12, 2026
This issue might be a duplicate of existing issues. Please check:
The temporary DLL files being flagged (.3aebfe470f372ef5-00000000.dll in your case) match the pattern reported in other issues. This appears to be a known issue with Windows Defender's heuristic/ML signatures flagging bundled CLI/GUI binaries.
Feel free to ignore if your specific case differs from these reports.
rekram1-node commentedon Jan 16, 2026
It's a false alarm, we are going to do some code signing to fix
Hona commentedon Mar 29, 2026
As of OpenCode v1.3.4 across the CLI + Desktop apps, we have full code signing - so there should be no more warnings.
Please let me know otherwise