scene: two quick sky changes build the last sky; Night drift test is exact #57
2026-11-10
scene: two quick sky changes build the last sky; the Night drift test is exact
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A rebuild read the sky choice before awaiting its key and acted on it after, so Day then Dusk in quick succession left the Day scene live (the old test only counted disposals and passed with the Dusk scene never built). A rebuild now stands down if the choice moved while it awaited; that change has its own rebuild. The test asserts the last sky built is the last one chosen, is the live scene (a login reaches it), and that every other scene was disposed. The NIGHT_SKY_LIGHTEST drift test compared with a 1e-6 tolerance, so 0.081641 passed; it is now exact equality. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>