Use when the user wants to retrieve or update Organization-Wide Default (OWD) sharing settings for Salesforce objects. TRIGGER on org-wide defaults, checking/viewing sharing defaults, changing default access levels (Private, Public Read Only, Public Read/Write, Controlled by Parent), internal/external access for standard or custom objects, making records private, or sharingModel in .object-meta.xml files. DO NOT TRIGGER for sharing rules, criteria-based sharing, role hierarchy, or manual sharing — delegate to platform-sharing-rules-generate.
