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The counter path checked it, the explicit one did not, and the parser is not the only caller: processChatCommand takes APIWalletBind from library callers too. hardened leaves an index at or above 2^31 alone, so account i and i + 2^31 are the same key while the duplicate check compares the stored integers, and two profiles could hold one account's names. The rfc now says what hiding a profile from /_wallet does and does not protect: the seed is one per device, so whoever unlocks any profile can derive every account. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Rvc3HbiWBTqbAvRT45G5oX