Annotation: text, dimensions, and leaders.

Operations: create_text — data: {x, y, text, height?, rotation?, layer?} create_dimension_linear — data: {x1, y1, x2, y2, dim_x, dim_y} create_dimension_aligned — data: {x1, y1, x2, y2, offset} create_dimension_angular — data: {cx, cy, x1, y1, x2, y2} create_dimension_radius — data: {cx, cy, radius, angle} create_leader — data: {points: [[x,y],...], text}

Block definition, insertion, and attribute management.

Operations: list — List all block definitions. insert — data: {name, x, y, scale?, rotation?, block_id?} insert_with_attributes — data: {name, x, y, scale?, rotation?, attributes: {tag: value}} get_attributes — data: {entity_id} update_attribute — data: {entity_id, tag, value} define — data: {name, entities: [{type, ...}]}

Drawing file management.

Operations: create — Create a new empty drawing. data: {name?} open — Open an existing drawing. data: {path} info — Get drawing extents, entity count, layers, blocks. save — Save current drawing. data: {path?} (saves to path if given, else QSAVE) save_as_dxf — Export as DXF. data: {path} plot_pdf — Plot to PDF. data: {path} purge — Purge unused objects. get_variables — Get system variables. data: {names: [...]} undo — Undo last operation. redo — Redo last undone operation.

Entity creation, querying, and modification.

Create operations: create_line — x1, y1, x2, y2, layer? create_circle — data: {cx, cy, radius}, layer? create_polyline — points: [[x,y],...], data: {closed?}, layer? create_rectangle — x1, y1, x2, y2, layer? create_arc — data: {cx, cy, radius, start_angle, end_angle}, layer? create_ellipse — data: {cx, cy, major_x, major_y, ratio}, layer? create_mtext — data: {x, y, width, text, height?}, layer? create_hatch — entity_id, data: {pattern?}

Read operations: list — layer? → list entities count — layer? → count entities get — entity_id → entity details

Modify operations: copy — entity_id, data: {dx, dy} move — entity_id, data: {dx, dy} rotate — entity_id, data: {cx, cy, angle} scale — entity_id, data: {cx, cy, factor} mirror — entity_id, x1, y1, x2, y2 offset — entity_id, data: {distance} array — entity_id, data: {rows, cols, row_dist, col_dist} fillet — data: {id1, id2, radius} chamfer — data: {id1, id2, dist1, dist2} erase — entity_id

Layer creation and management.

Operations: list — List all layers with properties. create — data: {name, color?, linetype?} set_current — data: {name} set_properties — data: {name, color?, linetype?, lineweight?} freeze — data: {name} thaw — data: {name} lock — data: {name} unlock — data: {name}

P&ID drawing with CTO symbol library.

Operations: setup_layers — Create standard P&ID layers. insert_symbol — data: {category, symbol, x, y, scale?, rotation?} list_symbols — data: {category} draw_process_line — data: {x1, y1, x2, y2} connect_equipment — data: {x1, y1, x2, y2} add_flow_arrow — data: {x, y, rotation?} add_equipment_tag — data: {x, y, tag, description?} add_line_number — data: {x, y, line_num, spec} insert_valve — data: {x, y, valve_type, rotation?, attributes?} insert_instrument — data: {x, y, instrument_type, rotation?, tag_id?, range_value?} insert_pump — data: {x, y, pump_type, rotation?, attributes?} insert_tank — data: {x, y, tank_type, scale?, attributes?}

Server status and management.

Operations: status — Backend info, capabilities, health check. health — Quick health check (ping backend). get_backend — Return current backend name and capabilities. runtime — Return process/runtime details for spawn diagnostics. init — Re-initialize the backend. execute_lisp — Execute arbitrary AutoLISP code (File IPC only). data: {code}

Viewport control and screenshot capture.

Operations: zoom_extents — Zoom to show all entities. zoom_window — Zoom to window: x1, y1, x2, y2 get_screenshot — Capture current view as PNG image.