Four error strings and four comments named Eve, which is a consumer's
interface and not a concept the kernel has. The errors now say what they
refuse — a command ID, an opportunity, persisted controller work — and the
comments name an operator interface or a consumer's payload.
Nothing pins these strings: the four `#[error(...)]` literals appear only at
their definitions, and no test reads a `Display` of them.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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