Claim labels
Official means a primary publisher, platform or developer source states the fact. Preview-verified means a named outlet reports observing it in a controlled build. Editorial means the page describes this site's method or recommendation.
Puzzle verification
After launch, a complete solution needs a successful replay, a version/platform note and enough surrounding context to distinguish the intended route from a lucky interaction. If a patch changes a step, the old route remains in the changelog rather than disappearing silently.
Corrections
Material errors are corrected with a dated update note. Missing data is treated as unknown, never as zero, absent or impossible.