- c4_wide_level: 10-sibling wide level on the permanent deep-chain fixture — sibling cap (5) -> load-more reveals all 10 in order -> collapse hides all 10 (+10 badge) -> expand restores; asserts the wide level coexists with the deep chains in the same thread. - c5_deep_chain_focused: 20-level chain — tombstone-guarded load-more continues past the sibling cap, nesting through the depth-10 fetch boundary, three chained focused-thread screens to the depth-20 tail, back-stack returns to the detail. Both flows ran green twice. - c1-c3 hardened for seed growth: 60s feed scrolls, retry-launch (documented cold-start stale-semantics quirk), centerElement before tapping the NASA card (plain taps started landing on the author row and opening the profile instead of the post). - config.yaml: c4/c5 slotted after c3 in flowsOrder. - docs/QA_LOOP_LOG.md: ROUND 2 deep-chain row (final loop iteration), incl. the permanent fixture URI and open backend/product items. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>