Overview Lightning Reports define how Salesforce data is queried, grouped, filtered, and displayed. Each report is a single file placed under within the project's source directory (check → for the source root). Critical Rules (Read First) TOP DEPLOYMENT KILLERS — check these BEFORE generating any report: 1. Grouping fields in columns — Fields in or must NEVER also appear in 2. Wrong column names (REQUIRED lookup) — Before writing any , , , filter , or chart , take every name from the table for the chosen in , or confirm it with . NEVER derive a column name from the field's API name: , , , all…