[Bug][aup] Refused to advise on adding HMAC request signing to authenticate web app API endpoints (req_011CcFYvpWMMTPS6A6hwnMwB)

Type: AUP / Usage-Policy block (false positive) · Work domain (heuristic): general

Why this is a false positive

Claude Code returned a Usage Policy block in the middle of a routine web-application development session focused on API authentication hardening (adding HMAC signing to internal endpoints) and a Content Security Policy framing error — standard, authorized software-engineering work on the user's own codebase. Nothing in the request involves a prohibited use; the prior turns are ordinary debugging of a frontend table-rendering bug, endpoint smoke-testing, and a design discussion about request-signing tradeoffs. The block appears to be a false positive triggered by security-adjacent vocabulary (HMAC, authentication, CSP, secrets) rather than any actual policy-violating intent.

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 2026-06-21T01:39:12.432Z.

Request IDs (lookup-able server-side)

• req_011CcFYvpWMMTPS6A6hwnMwB (2026-06-21T01:39:12.432Z)

In-scope justification

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

Block message

API Error: Claude Code is unable to respond to this request, which appears to violate our Usage Policy (https://www.anthropic.com/legal/aup). Please double press esc to edit your last message or start a new session for Claude Code to assist with a different task.

Request ID: req_011CcFYvpWMMTPS6A6hwnMwB

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

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_{🔎 Filed automatically by ClAudit v2.0.21 — a FOSS tool for reporting false-positive Claude Code blocks.}