`Promise.reject(dup)` is a zero-byte file a tool hook wrote into the working
tree; #70 committed it by accident. Nothing reads it. Found in the account
deletion walk (docs/website/ACCOUNT_DELETION.md step 6, W1).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY