[Bug][cyber] Safety block halted DUML protocol reverse-engineering for a drone ADS-B decoder (req_011CcmHFiAtBT2k4h4isR8iy)

Triage: kind cyber · domain reverse-engineering · 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): reverse-engineering

Why this is a false positive

The session was reverse-engineering the [REDACTED] [REDACTED] wire protocol to determine the byte layout of an ADS-B "push data" payload for a [REDACTED]-series drone, in order to write a clean decoder against decompiled source already present locally. This is standard protocol reverse-engineering for interoperability/decoder development, not an attack technique, yet the safety classifier flagged it as a cybersecurity topic and halted the entire session rather than just the specific request.

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 2026-07-06T18:31:21.423Z.

Request IDs (lookup-able server-side)

• req_011CcmHFiAtBT2k4h4isR8iy (2026-07-06T18:31:21.423Z)

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 for a cybersecurity topic. If your work requires this access, you can apply for an exemption: https://claude.com/form/cyber-use-case?token=[SCRUBBED]

Please double press esc to edit your last message or start a new session for Claude Code to assist with a different task.

Send feedback with /feedback or learn more: https://support.claude.com/en/articles/8106465

Request ID: req_011CcmHFiAtBT2k4h4isR8iy

Environment: Claude Code, Linux. · Work domain: reverse-engineering

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_{🔎 Filed automatically by ClAudit v2.0.104 — a FOSS tool for reporting false-positive Claude Code blocks.}