[Bug] Claude Code incorrectly flags valid PLC packet structure as unsafe
Status Open
Reported on v2.1.263
Maintainer reply None cached
Activity 0 comments · opened Sep 10, 2026
Bug Description
i am trying to create a packet structure to communicate with a PLC, I have created the example packet on the PLC and sent it to mqtt exactly how the target system is supposed to do and wanted to identify whether it's little endian/big endian and if the PLC uses packing of the bits and the safeguard flagged that message for some reason? I dont'; understand this
Environment Info
- Platform: linux
- Terminal: vte-based
- Version: 2.1.263
- Feedback ID: 91adc5c6-a7bf-4e2b-83b9-7f8f414d5874
Errors
Opus 5 (1M context)'s safeguards flagged this message. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate coding, cybersecurity, and biology tasks. Switched to Opus 4.8. Send feedback with /feedback or learn more
Details: `[cyber]````