~x-ai/grok-latest → B (2:3)

B redesigns `scan_jsonl` to a fast parse-only pass (dropping full reducer replay/rank work that made real logs slow), surfaces full DSL `parse_error` detail, and adds `compile --ingest` plus human-readable scan output—lasting tooling. A is solid product work (chromeless fullscreen layout, left-oriented edge history sort/ratios, post morph preview) but is narrower UX polish on one flow versus B’s reusable offline diagnostics.