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}

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, ...}]}

Annotation: text, dimensions, leaders, and automatic dimension workflows.

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} detect_parts — read-only geometry clustering; data: {source_layers?, gap_tolerance?, include_screenshot?} plan_dimensions — preview a plan without editing; data: {target_part_id?, entity_ids?, region?, region_mode?, selection?, use_current_selection?, source_layers?, profile?, dimension_layer?, include_overall?, include_features?, include_holes?, include_arcs?, include_centers?, clear_existing?} commit_dimension_plan — commit an approved plan; data: {plan_id, expected_revision, ...} auto_dimension — detect, plan, and commit in one request. It accepts target_part_id, entity_ids, region, region_mode, selection='current' or use_current_selection, source_layers, dimension_layer, profile, include_overall, include_features, include_holes, include_arcs, include_centers, clear_existing, include_screenshot. batch_create_dimensions — commit data.dimensions in one request, one Undo group, and one final Regen where the backend supports it. dimension_profiles — data: {action: list|get|save|delete, ...} audit_dimensions — read-only dimension quality audit; data: {profile?, dimension_layer?, include_screenshot?} repair_dimension_layout — apply a fresh audit's safe repairs; data: {audit_id, issue_ids?, spacing?}

Automatic-dimension selectors are mutually exclusive: target_part_id, entity_ids, region, or selection='current'. Dimension results include created_count, dimension_types, selection_scope, scan counters, commit_engine, regen_count, and timings_ms when the backend can provide those values.

Performance rule: when two or more dimensions are needed, use annotation_batch_create_dimensions or annotation_auto_dimension once. Do not call create_dimension_* repeatedly.

Performance rule: pass region, entity_ids, or selection='current' whenever possible. After annotation_detect_parts, reuse geometry_cache_token together with target_part_id so the same full drawing is not exported twice.

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?}

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.

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. tool_manifest — Read-only registration, entrypoint, phase, and backend diagnostics. init — Re-initialize the backend. execute_lisp — Execute AutoLISP code (File IPC only). data: {code}. Remote profiles deny this unless AUTOCAD_MCP_ALLOW_EXECUTE_LISP=1 (and OAuth write scope when auth_mode=oauth).

Cluster Model Space geometry and return part_1, part_2... with an indexed preview.

Performance rule: pass region, entity_ids, or selection='current' whenever possible. After annotation_detect_parts, reuse geometry_cache_token together with target_part_id so the same full drawing is not exported twice.

Create or revise a D1/D2... plan; no AutoCAD entity is created.

Commit one approved plan exactly once; File IPC uses one AutoCAD UNDO group.

Plan and immediately commit dimensions for one selected part/region/entity set.

Performance rule: when two or more dimensions are needed, use annotation_batch_create_dimensions or annotation_auto_dimension once. Do not call create_dimension_* repeatedly.

Performance rule: pass region, entity_ids, or selection='current' whenever possible. After annotation_detect_parts, reuse geometry_cache_token together with target_part_id so the same full drawing is not exported twice.

List/get/save/delete mechanical_mm, mechanical_inch, iso_simple or custom profiles.

Find duplicates, overlap, crossings, missing intent, detached refs and style errors.

Remove duplicates and fix safe layer/style/lane issues from a fresh audit.

Create two or more dimensions in one request and one Undo group.

Use this instead of repeatedly calling annotation.create_dimension_*. data.dimensions accepts linear, diameter, radius, center, and text items in either plan-shaped form (geometry/placement) or compact coordinate form.