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Return durable progress, the immutable confirmed plan snapshot with per-question response contracts, response artifacts, deterministic method calculations, and stage readiness for a confirmed multi-question Study run. An item with askIf carries routing on its artifact: askedCount, and the Minds not asked, which are excluded from that item's responses; an item no Mind was asked is a not_asked artifact. An item gated on an open question's category also carries gateCoding (per category, how many gate answers were coded into it, and how many into none), with none meaning a verified outside-frame reading. New verified readings include an opaque readingId referencing private source evidence; the evidence itself is not included in public results. Unavailable or unresolved gate readings fail before asking dependent respondents and use the existing retry/error lifecycle. Older artifacts may retain gateCodingUnavailable when a historical worker asked everyone after coding failed.