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Malte UblandClaude Opus 5.5
25a630a8ca
An intersection that restates an optional member as required with a
separately written element type (`Opts & { files: Array<{ path: string }> }`
over `files?: Array<{ path: string }>`) gives the member the type
`A[] & B[]`. The checker keeps both element literals, and no intersection
rule mapped an intersection of arrays, so the record was refused (SC2009).
When every constituent maps to one IR type that is not the dynamic value,
the intersection now maps to it. The rule runs only after every other
intersection rule declined, so intersections that already mapped keep their
mapping.
pi's NormalizedBuildSystemPromptOptions is such an intersection; it sits on
the chain from main()'s options to the extension API and refused main().
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>