Split

• Target is Collection (not Note)
• Invalid JSON structure
• No items to split

Empty Collection ≠ error — indicates no splittable content, not failure.

REPRESENTATION INVARIANTS

• Note containing JSON array ≠ Collection
• split converts: array → Collection, text → Collection
• flatten performs inverse (Collection → Note)
• search-web/semantic-scholar return Collections directly — NO split needed

ANTI-PATTERNS

❌ split(target=$collection) → Collections already split, use display to view ❌ split(target=$search_results) → search-web returns Collections, not Notes ❌ Splitting Collection to "see inside" → Use display or flatten instead