[Bug][cyber] False positive trigger during open-source MSP software codebase rebuild (req_011CevbfxJRk4RaKPDKULFiC)

Triage: kind cyber · domain general · flagging model Opus 4.8 · severity session-halted (blocked authorized work) · reproducible: yes — server-side via the Request ID(s) below

Type: Cybersecurity safety-filter false positive · Work domain (heuristic): general

Why this is a false positive

The cyber safeguard triggered on a frustrated exclamation directed at the assistant during a session refactoring an open-source managed service provider codebase. The underlying task deployed subagents to inspect Go packages, collect struct definitions, and assemble a 252-file build tree. The safeguard terminated the session upon receiving the single-word prompt, halting the generation process after writing 67 files.

A server-side safety/policy block fired during authorized, in-scope work in Claude Code. Filing as a false positive. Recurred 1× across 1 session(s); first seen 2026-09-10T23:07:08.460Z.

Request IDs (lookup-able server-side)

• req_011CevbfxJRk4RaKPDKULFiC (2026-09-10T23:07:08.460Z)

In-scope justification

False positive — in-scope, authorized security work; not out of scope. Filed automatically by claudit.

Block message

API Error: Opus 4.8's safeguards flagged this message. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate cybersecurity work. Apply to the Cyber Verification Program to reduce these interruptions. Send feedback with /feedback or learn more: https://support.claude.com/en/articles/14604842-real-time-cyber-safeguards-on-claude

Details: [cyber]

Request ID: req_011Cee1h2ZfgjjSzSb5onyLt

Environment: Claude Code, Linux. · Work domain: general

Related reports (same work session, linked)

Distinct false-positive blocks from the same work session, each its own report:
#94107, #94108

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_{🔎 Filed automatically by ClAudit v2.2.5 — a FOSS tool for reporting false-positive Claude Code blocks.}