Do not expose `MutableList`. Keep mutable collections private or internal and return `List` or `Map` from repository APIs. This defines ownership and prevents callers from mutating repository state accidentally.
Scanned 9/5/2026
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Do not expose `MutableList`. Keep mutable collections private or internal and return `List` or `Map` from repository APIs. This defines ownership and prevents callers from mutating repository state accidentally.
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