SheetAgent for Civil 3D is a sheet-production plugin for Autodesk Civil 3D that turns sheet production from a one-time event into a managed, living set. Civil engineering teams generate plan and profile sheets, key maps, legends, matchlines, and title blocks on their own firm standards, then keep all of it in sync as the design evolves. Sheets generate four ways: array tiles a closed boundary; path runs sheets along a polyline for exhibits and corridors; alignment-based sheets follow stationing; and free placement drops a sheet preview in model space on a click. Nothing is locked. Every element a civil engineer would touch stays editable: move, rotate, or reshape a tile and the layout follows; adjust viewports; redraw matchlines; and edit, reposition, or swap the title block and its fields, all without breaking the set. When an alignment moves, the set re-tiles against the new geometry while matchlines, viewport titles, and sheet numbers come along. Generated sheets stay in sync with Autodesk Sheet Set Manager, so sheet numbering and sheet lists stay current. A Health dashboard flags drift before a set ships, Company Standards live in an editable Excel file, and a Manager Portal shows usage and time saved from team telemetry. Everything runs locally; no drawing data leaves the workstation.