<!-- event: create author: tickets.sh at: 2026-05-28T13:13:17Z -->

## Created

Created by tickets.sh create.

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<!-- event: state_changed author: hare at: 2026-06-20T16:45:54Z from: planning to: closed reason: closed field: state -->

## State changed

Ticket を closed にしました。


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<!-- event: close author: hare at: 2026-06-20T16:45:54Z status: closed -->

## 完了

Closed as completed. The crate responsibility boundary audit was already performed and recorded in artifacts/audit.md with concrete findings; any implementation cleanup should be handled by narrower follow-up tickets.


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