Source priority
Official lifecycle APIs and databases come first, followed by official support matrices, knowledge-base articles, documentation, and announcements. Secondary sources are discovery hints only.
Snapshots
Each check records response metadata, content hash, fetched and checked times, a sanitized snapshot or legally permissible excerpt, and source-health outcome.
Confidence
Confidence combines source authority, exact product identity, evidence alignment, date semantics, freshness, parser reliability, and contradiction state. Low, unconfirmed, and conflicted claims stay unpublished.
Corrections
Material changes append immutable old/new values, supporting evidence, detection and effective times, notification lineage, and a visible correction note.