"[cyber]" flag stops sessions

“Three blocks in one session keep breaking a long autonomous coding run that I set up overnight.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/claude-code/issues/18336/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Quiet. No reports in the last two weeks, down from 3 a week at the mid-October peak. Not fixed, and no vendor reply yet.

"[cyber]" safety flag stops sessions during terminal tooling development. Block interrupts a long autonomous run while developing a CLI tool using escape sequences, base64-wrapped commands, and SSH password prompts.

Is this your bug?

File my report

Where: API safety classifier
Versions: 2.1.292
Platforms: macOS
How bad: Breaks a normal workflow.

Part of: Safeguards block session requests34 bugs

Cyber safeguard blocks sessions377 people
Reasoning_extraction safeguard block134 people
Cyber safeguard pauses sessions52 people
Safeguards refuse work requests48 people
Safeguards block requests47 people
Classifier halts routine replies12 people
Requests blocked with a [cyber] flag8 people
Refusal on own-code hardening11 people
SSH to own devices refused7 people
Pentest work blocked6 people

Show all 33Show only the largest 10

CTF requests flagged as malicious6 people
Classifier blocks own-project work6 people
Classifier halts reverse engineering5 people
Safeguards flag verified cyber work6 people
Firmware requests flagged as cyber6 people
Classifier stops benign replies5 people
reasoning_extraction API error5 people
Safeguard blocks all messages4 people
[bio] classifier blocks responses4 people
Reasoning extraction safeguard block4 people
Security investigation requests blocked3 people
Classifier stops DeFi bot work3 people
Safeguards block CVP members3 people
Safety classifier blocks agent3 people
Fictional hacking content flagged3 people
Cyber verification prompt recurs2 people
Cyber safeguards block own devices2 people
Safety classifier stops auth work2 people
Phishing research project flagged2 people
Cyber stop on report tasks2 people
Cyber safety block on audits2 people
Biological safeguard triggers in sessions with no biology content2 people
Unexpected safeguards notice2 people

Original reports3, newest first

Oct 16, 2026Anthropic API Error: Excessive false positive "[cyber]" safety flags for legitimate terminal tooling development#102769
Oct 16, 2026Anthropic API Error: Repeated "[cyber]" False Positive Flags in Single Session#102681
Oct 16, 2026Anthropic API Error: Overly aggressive "[cyber]" safeguard flag on terminal automation tooling#102678