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Build # 35878930630

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push

github

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web-flow

Commit Message

Require exactly one name for a requires or optional block (#2991)

A `requires` or `optional` given a block declared something other than
it read when it did not name exactly one parameter:

- With no name, the block's params were declared one level up, and
  under `optional` they were still required.
- With several names, all of them were required, but only the first got
  the block's params, and the others were left out of `declared`.

`DSL::Parameters#declare` now raises ArgumentError for either. That makes
`ParamsScope#new_scope`'s `if element` guard around the group-type check
unreachable, so the check always runs, and the `type || Array` fallback
behind it goes too.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

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