`[2026-06-16]` **My #295 coupling hypothesis (the promoted question crowds out the fact at small top_k) was REFUTED** — worldtree-dev's recall over-fetches `top_k=128`, so the question can't crowd the fact out at search level. The real cause was the scope-axis asymmetry. Lesson: offer provider-side hypotheses, let the upstream owner check them against their code.