admin-sharing-troubleshooting

Answers Salesforce admin sharing/visibility questions like "why can't user X see Y", "who can see this record", "what would let this user see Y", "the user says they can't see Z", "visibility check for X on Y", "sharing rules touching Z", "role hierarchy from Foo up", "what grants Edit access to Bar". Calls sfi.why_cant_user_see_record (cascade over OWD → permission grants → role hierarchy → owner sharing rules →…