Fourteen table entries carried the same four lines: call the CoreAPI method,
return early on error, swap a nil slice for an empty one so the wire says []
and not null. withParamsSlice holds that once and each entry is now the call
it makes.
Three id-only request types were the same struct under three names, so the
routine transitions use the idReq that was already declared and unused. The
revert reply was a map literal on one side and an anonymous struct on the
other; revertResp names it. Both are wire-identical.
claude
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