Dev note · contract addition
Same SpokenLine.parts addition as the mixed variant. The all-clear gate is derivable from today's payload and must be computed, not guessed: every line partsClear == partsTotal and scoredCount == scoreEligibleCount and no part came back uncertain. A run with a dropped syllable has not earned this screen (§2.2) and takes the mixed variant instead.
Sound · the one place the green triad may sound
The rising green triad already shipping on a clean scored take is this sequence's primary chime, and it sounds here only — the gate above is what the triad means. Beat 2's neutral voice signature is then suppressed: one primary chime per sequence, not audio on every beat. Haptic: one firmer tick as the last segment lands.