Joshua King
bff2f4ff5e
Review round 1 (Codex gpt-5.6-terra, MEDIUM): the overrides mapping was shallow-copied, leaving caller-owned lists mutable through _overrides — a later append would change is_present results. Each validated list is copied into an immutable tuple before wrapping; tests prove post-construction appends change nothing and the snapshot refuses mutation. Suite: 996 passed.