Operator 2026-10-03: a total diff view for agents - concise, nothing shown twice, pretrained terms, compressed. Scout: ResearchEnrichment research (context engineering) - JetBrains observation masking (half cost, same quality), Anthropic context editing (-84%) and tool search (-85%, higher accuracy), CSV vs JSON (1/3), TOON, read-dedup pitfalls (stub must say where; hash on content). Baseline from the copilot footer: web question 17,285 tokens, add 4,400. Same node, row or URL inside one answer returns [unchanged since turn N - <where>] when its content hash matches; any change returns the full content. Extends BRAINSTORM.29 (identical read-only calls).