Manage CAD application lifecycle, COM connection, viewport controls, and undo/redo history.

Behavior:

• Mutation: Controls external CAD application process, active COM session, and editor state.

• Persistence: Connection state persists across subsequent tool calls in the MCP server process.

• Side Effects: Can launch CAD application process (connect), terminate session (disconnect), or launch local web dashboard in browser (open_dashboard).

Usage Guidelines:

• When to Use: Call to verify CAD connectivity, connect to running CAD, inspect CAD vendor info, or perform composite session operations (e.g. connect + zoom_extents + status).

• Sibling Routing / Alternatives:

  • For pure camera, zoom, 3D viewpoints, and visual styles, prefer manage_view.

  • For opening, saving, closing, or switching drawing files, use manage_files.

  • For creating geometry, use draw_entities.

Actions & Parameters:

• connect: Launches and connects to auto-detected CAD software (AutoCAD, ZWCAD, GstarCAD, BricsCAD).

• disconnect: Unlinks from active CAD COM session.

• status: Returns current connection status, active adapter type, and drawing name.

• list_supported: Lists installed and supported CAD application vendors.

• check_running: Detects running CAD processes without attaching.

• zoom_extents: Zooms active viewport to fit drawing extents.

• screenshot: Captures active CAD window raster screenshot as base64 PNG.

• export_view: Generates internal drawing raster preview.

• undo: Steps back in drawing history. Parameter: count (int, default: 1).

• redo: Steps forward in drawing history. Parameter: count (int, default: 1).

• open_dashboard: Launches web dashboard in browser. Parameters: host, port.

Parameters:

• operations: Shorthand string or JSON array of session action objects.

Returns: JSON string with per-operation status, connection details, and results.

Control CAD camera viewport, display zoom, 3D viewpoint presets, and visual shading styles.

Behavior:

• Mutation: Modifies interactive viewport display state (zoom factor, center point, view direction, visual style) in the active CAD editor window. Does NOT modify drawing database entities.

• Persistence: Viewport changes persist in the active drawing session until manually adjusted or closed.

• Side Effects: Refreshes display graphics in active CAD GUI. In screenshot/preview operations, reads screen framebuffer and returns base64 image data.

Usage Guidelines:

• When to Use: Call whenever navigating the drawing, zooming to extents (ze), zooming into specific coordinates (zw), switching to 3D axonometric perspectives (preset|iso_sw), changing shading (style|realistic), or stepping through history (undo/redo).

• Sibling Routing / Alternatives:

  • For creating, configuring, or activating paperspace sheet presentations and architectural viewports, use manage_layouts.

  • For launching an interactive web-based canvas viewer for human inspection in the browser, use show_drawing_viewer.

  • For exporting vector PDF sheets or SVG files to disk, use export_data.

Shorthand Grammar (one command per line or semicolon-separated):

• ze (or zoom_extents): Zoom to fit all drawing entities in viewport.

• zw|x1,y1|x2,y2 (or zoom_window): Zoom into rectangular window bounds.

• zc|x,y|mag (or zoom_center): Center view on coordinate (x,y) with optional magnification factor.

• preset|top|bottom|front|back|left|right|iso_sw|iso_se|iso_ne|iso_nw: Switch 3D or orthographic viewpoint.

• style|2d|wireframe|conceptual|realistic|shaded|hidden: Set visual rendering mode.

• screenshot / preview: Capture visual raster snapshot of current drawing viewport.

• undo|count / redo|count: Step backward or forward in CAD session history (default count: 1).

Parameters:

• operations: Shorthand string commands (one per line) or JSON array of operation objects.

Returns: JSON string containing per-operation execution results, success status, and details.

Create new 2D/3D geometric primitives, text, dimensions, leaders, and native tables.

Behavior:

• Mutation: Mutates the drawing database by creating and appending new entities.

• Persistence: Changes persist in the active drawing database and are written to DWG/DXF file upon save.

• Side Effects: Auto-creates destination layers if they do not exist. Automatically computes centroid and extents.

Usage Guidelines:

• When to Use: Call whenever creating new geometry from scratch (lines, walls, circles, rectangles, polylines, text labels, architectural dimensions, multi-arrow leaders, or schedule tables).

• Sibling Routing / Alternatives:

  • For modifying, transforming (move, rotate, scale), restyling, or deleting existing entities, use manage_entities.

  • For inserting reusable component blocks (doors, windows, symbols) or creating block definitions, use manage_blocks.

  • For creating paperspace presentation sheets, title blocks, and viewports, use manage_layouts.

  • For attaching external DWG references or raster underlays, use manage_xrefs.

Shorthand Grammar (one entity specification per line):

• line|start|end|color|layer → line|0,0|10,10|red|walls

• circle|center|radius|color → circle|5,5|3|blue

• rect|corner1|corner2|color → rect|0,0|20,15

• text|pos|text|height|color → text|5,5|Hello|2.5

• arc|center|radius|start|end → arc|0,0|5|0|90

• polyline|points(;)|closed|color → polyline|0,0;10,10;20,0|closed

• spline|points(;)|closed|color → spline|0,0;5,10;10,0

• dimension|start|end|color → dimension|0,0|10,0

• leader|points|text|height|color|layer → leader|0,0;10,10|Note|2.5|red

• leader|group1group2...|text|height|color → leader|0,0;10,10~~0,0;-10,10|Note

• table|ins|rows|cols|row_h|col_w|title|headers|data → table|0,0|4|3|3|15|Precios|Item;Cant;Val|Acero;10;150~~Mano;5;120

Defaults: color=white, layer=0. Coordinates: "x,y" or "x,y,z". Points in a polyline/leader: semicolon-separated "0,0;10,10".

Parameters:

• entities: Shorthand string (one command per line) or JSON array of entity specification objects.

Returns: JSON string with created entity handles, status, and summary count.

Create, modify, toggle visibility, restyle, and apply standardized AECO layer templates.

Behavior:

• Mutation: Mutates drawing layer table (creates layers, renames, changes colors, sets lineweights).

• Destructive Actions: Flag delete|name as destructive; removes target layer definition (layer cannot contain entities or be active layer 0).

• Persistence: Layer definitions, visibility states, colors, and lineweights persist in DWG/DXF database.

• Side Effects: Toggling layers (on/off) updates viewport entity visibility immediately.

Usage Guidelines:

• When to Use: Call to organize drawing structure, enforce architectural CAD layer standards (template|aeco), isolate or hide geometry, set lineweights, or create target layers before drawing.

• Sibling Routing / Alternatives:

  • For creating geometry on specific layers, use draw_entities(entities="line|...|layer").

  • For moving existing entities between layers, use manage_entities(operations="set_layer|...").

  • For paperspace layout sheets and viewports, use manage_layouts.

Shorthand Grammar:

• create|name|color|lineweight: Create new layer (e.g. create|walls|red|50).

• delete|name: Delete empty layer (destructive).

• rename|old|new: Rename existing layer.

• on|names: Turn on layers (comma-separated, e.g. on|walls,doors).

• off|names: Turn off layers (e.g. off|furniture).

• set_color|name|color: Change layer color (e.g. set_color|walls|red).

• template|preset: Batch-create standard layer palette (presets: aeco/cte, aia, mep).

• is_on|name: Query if layer is currently visible.

• list: List all layers in drawing.

• info: Detailed layer summary with colors and states.

Defaults: color=white, lineweight=25 (0.25mm), template preset=aeco.

Parameters:

• operations: Shorthand string (one command per line) or JSON array of layer operation objects.

Returns: JSON string containing per-operation execution results, layer list, and status.

Open, save, create, close, list, and switch active CAD drawing files (.dwg, .dxf).

Behavior:

• Mutation: Modifies document collection state. save writes files to disk; new initializes fresh drawing; close unloads drawing from CAD memory.

• Destructive Actions: Flag close|false as destructive if unsaved changes exist (discards edits without saving).

• Persistence: Saves document files permanently to disk in DWG or DXF formats.

• Side Effects: Switches active document context for all subsequent CAD operations.

Usage Guidelines:

• When to Use: Call to manage CAD file lifecycle (create blank drawing, save backup or work in progress, list open files, close tab, or switch active drawing).

• Sibling Routing / Alternatives:

  • For plotting or exporting data/measurements into PDF, Excel, or BC3, use export_data.

  • For referencing external drawings without opening them as active editing documents, use manage_xrefs.

  • For CAD connection lifecycle (connecting to CAD software, status, undo/redo), use manage_session.

Shorthand Grammar:

• new: Create a new blank drawing.

• save|filename|format: Save drawing to disk (formats: dwg, dxf, pdf. Default: dwg).

• close|save_changes: Close active drawing (save_changes: true/false. Default: false).

• list: List all currently open drawings and indicate active file.

• switch|drawing_name: Switch active document focus to specified open drawing.

Parameters:

• operations: Shorthand string (one command per line) or JSON array of file operation objects.

Returns: JSON string containing per-operation execution results, active file names, and status.

Modify, select, transform, restyle, compute areas, and manage existing drawing entities.

Behavior:

• Mutation: Mutates drawing entities (positions, rotations, layers, colors, attributes).

• Destructive Actions: Flag delete|handles as DESTRUCTIVE; permanently deletes specified entity handles from drawing.

• Persistence: Geometric modifications persist in drawing database upon save.

• Side Effects: copy/paste accesses internal CAD clipboard buffers; area_table creates a new AutoCAD schedule table.

Usage Guidelines:

• When to Use: Call to modify existing drawing elements (select, move, rotate, scale, change color/layer, copy, paste, delete, measure area, insert area schedule table).

• Sibling Routing / Alternatives:

  • For creating new geometry from scratch, use draw_entities.

  • For inserting or creating reusable blocks, use manage_blocks.

  • For whole-drawing spatial inspection or raycasting without modifying anything, use inspect_drawing.

  • For layer lifecycle (create/delete layers, template application), use manage_layers.

Shorthand Grammar (one command per line or semicolon-separated):

• select|by|value → select|layer|walls (by: color, layer, type)

• move|handles|offset_x|offset_y → move|A1,B2|10|5

• rotate|handles|angle|cx|cy → rotate|A1|45|0|0 (angle in degrees)

• scale|handles|factor|cx|cy → scale|A1|2.0|0|0

• set_color|handles|color → set_color|A1,B2|red

• set_layer|handles|layer → set_layer|A1|walls

• set_color_bylayer|handles → set_color_bylayer|A1,B2

• copy|handles → copy|A1,B2

• paste|base_point → paste|100,200

• delete|handles → delete|A1,B2 (DESTRUCTIVE)

• area|handles → area|A1,B2 (or area|layer|A-ROOMS)

• area_table|ins_x,ins_y|layer → area_table|0,0|A-ROOMS|Cuadro Áreas

Parameters:

• operations: Shorthand string (one operation per line) or JSON array of entity operation objects.

Returns: JSON string containing per-operation execution results, affected handles, and status.

Create, insert, inspect, and manage reusable CAD blocks and attribute tags.

Behavior:

• Mutation: Mutates drawing by adding block definitions (create), inserting block references (insert), or updating attribute tags (set_attrs). list, info, and get_attrs are read-only.

• Persistence: Block definitions and inserted instances persist in the DWG/DXF database.

• Side Effects: Auto-creates destination layer if nonexistent during insert.

Usage Guidelines:

• When to Use: Call to insert reusable standard components (doors, windows, sanitaryware, electrical symbols, furniture), inspect block library definitions, or read/write block attribute tags (e.g. door width, fire rating).

• Sibling Routing / Alternatives:

  • For drawing primitive 2D geometry (lines, rectangles, polylines), use draw_entities.

  • For transforming or deleting arbitrary entity instances, use manage_entities.

  • For external project references linked as DWG files, use manage_xrefs.

Shorthand Grammar:

• list: List all block definitions in drawing.

• info|block_name|include: Get definition details and reference count (include: info, references, both).

• insert|name|point|scale|rotation|layer|color: Insert block instance at point (e.g. insert|Door|10,20|1.5|90|walls|red).

• create|name|handles|base_point|description: Create new block definition from existing entity handles.

• get_attrs|handle: Query attribute key/value dictionary from a block reference handle.

• set_attrs|handle|attributes_json: Set attribute values on a block reference handle (e.g. set_attrs|A1|{"TAG":"val"}).

Defaults: scale=1.0, rotation=0, layer=0, color=white.

Parameters:

• operations: Shorthand string (one command per line) or JSON array of block operation objects.

Returns: JSON string containing per-operation execution results, block details, and inserted handles.

Extract drawing measurements, bill of quantities, budget standards, or plot vector PDF sheets.

Behavior:

• Mutation: Strictly read-only for drawing geometry; does not alter CAD entities or model database.

• Persistence: When format is "excel", "bc3", or "pdf", writes persistent files to configured output directory.

• Side Effects: Filesystem file creation/overwrite in output directory. If format="json", purely returns in-memory payload without disk writes.

Usage Guidelines:

• When to Use: Call to extract structured quantity takeoffs, generate Excel spreadsheets (.xlsx), export Spanish AECO construction budgets (.bc3 FIEBDC-3), plot publication vector PDFs (.pdf), or retrieve JSON drawing entities.

• Sibling Routing / Alternatives:

  • For extracting thermal envelope parameters specifically formatted for energy certification in CE3X, use export_ce3x_envelope.

  • For interactive browser visualization of the plan, use show_drawing_viewer.

  • For spatial queries or bounding box summaries, use inspect_drawing.

Parameters:

• scope: Entity selection scope ("all", "selected"). Default: "all".

  • "all": Processes all entities across visible layers.

  • "selected": Restricts export to currently selected entities in CAD viewport.

• format: Output serialization format ("json", "excel", "bc3", "pdf"). Default: "json".

  • "json": Returns parsed entity array directly to LLM context.

  • "excel": Generates multi-tab Excel workbook with layer summaries, lengths, and areas.

  • "bc3": Generates standard FIEBDC-3/2020 budget and measurement exchange file.

  • "pdf": Plots modelspace/paperspace to standard vector PDF 1.4 document.

• filename: Output file name or relative path (e.g. "mediciones.xlsx", "presupuesto.bc3", "plano.pdf").

• paper_size: Paper standard when format="pdf" ("A4", "A3", "A2", "A1", "A0"). Default: "A3".

Returns: JSON string containing export summary, file path, exported entity counts, or extracted entity data.

Prompt the human user for interactive mouse clicks, coordinate picking, or command line input in CAD.

Behavior:

• Mutation: Strictly read-only for drawing geometry; does not alter drawing database.

• Persistence: No persistent side effects or disk modifications.

• Side Effects: Pauses execution to display prompt message in CAD command line and crosshair cursor, awaiting user mouse click or keyboard input. Captures ESC / cancellation gracefully.

Usage Guidelines:

• When to Use: Call for Human-in-the-Loop workflows whenever the AI needs the user to click a coordinate on screen, pick an entity visually with the crosshairs, measure a distance interactively, or confirm a string prompt.

• Sibling Routing / Alternatives:

  • For automated programmatic coordinate queries without user intervention, use inspect_drawing.

  • For selecting entities programmatically by layer/color/type, use manage_entities(operations="select|...").

  • For launching an interactive web-based canvas viewer in the browser, use show_drawing_viewer.

Shorthand Grammar:

• point|message|[base_x,base_y]: Prompts user to click a point in CAD viewport (e.g. point|Click door hinge point).

• entity|message: Prompts user to click an entity on screen (returns entity handle, type, and layer).

• distance|message|[base_point]: Prompts user to pick two points or measure distance in CAD.

• string|message: Prompts user to type text in CAD command bar.

Parameters:

• input: Shorthand string (action|message|optional_args), dictionary, or list.

Returns: JSON string containing user response, picked coordinates (x, y, z), picked entity handles, or cancellation status.

Manage external CAD references (DWG XREFs) and raster cartography or orthophoto underlays.

Behavior:

• Mutation: Modifies drawing reference table and external block definitions.

• Destructive Actions: Flag detach|name as destructive; removes reference link and unbinds geometry/images from drawing.

• Persistence: XREF and raster link paths persist in DWG/DXF database upon save.

• Side Effects: Reads external files from disk at specified paths during attachment.

Usage Guidelines:

• When to Use: Call to overlay external project files (structural models, MEP designs, topographies, aerial orthophotos, scans) as linked external references without duplicating geometry.

• Sibling Routing / Alternatives:

  • For inserting self-contained reusable CAD blocks embedded in the current drawing, use manage_blocks.

  • For opening, saving, or switching between independent drawing documents, use manage_files.

Shorthand Grammar:

• attach|path|[x,y]|[scale]|[rotation]: Attach DWG external reference.

• raster|path|[x,y]|[scale]: Attach raster image underlay (PNG, JPG, TIFF).

• list: List all currently attached XREFs and raster images.

• reload|name: Reload updated external reference file from disk.

• detach|name: Unlink and remove reference from drawing (destructive).

Parameters:

• input: Shorthand string, dictionary, or list containing action and parameters.

Returns: JSON string with operation status, attached reference names, and paths.

Extract CAD thermal building envelope parameters for CE3X energy certification.

Behavior:

• Mutation: Strictly read-only for CAD geometry; does not alter drawing database or active viewport.

• Persistence: Saves a standardized JSON envelope file to the configured output directory.

• Side Effects: Filesystem write of the output JSON file.

Usage Guidelines:

• When to Use: Call when bridging CAD floor plans to energy certification workflows (CE3X-MCP-SERVER, CTE DB-HE, or RD 390/2021). Computes exterior wall surface areas, wall azimuth orientations (N, S, E, W) by normal vector geometry, associated window openings, and usable floor area.

• Sibling Routing / Alternatives:

  • For generic drawing takeoffs, Excel spreadsheets, or FIEBDC-3 budgets, use export_data.

  • For spatial queries or room area schedules without thermal calculations, use inspect_drawing or manage_entities(operations="area|...").

Parameters:

• wall_height: Clear floor-to-ceiling height in meters. Default: 2.70.

• climate_zone: CTE climate zone (e.g., "A3", "C1", "D3"). Default: "C1".

• building_type: Building typology ("vivienda_individual", "bloque_viviendas", "terciario"). Default: "vivienda_individual".

• filename: Output JSON filename. Default: "envolvente_ce3x.json".

Returns: JSON string containing CTE thermal envelope parameters, ready for direct ingestion by CE3X-MCP-SERVER.

Inspect spatial intelligence, dimensions, geometric intersections, and object snaps.

Behavior:

• Mutation: Strictly read-only; does not modify drawing entities, layers, or CAD state.

• Persistence: No persistent side effects or disk modifications.

• Side Effects: Computes spatial relationships in-memory from active CAD or DXF model.

Usage Guidelines:

• When to Use: Call whenever the AI needs spatial intelligence (drawing extents, room schedules, what entity is located at coordinate X,Y, line crossings, or nearest snap points).

• Sibling Routing / Alternatives:

  • For launching an interactive graphical web viewer for human visual inspection, use show_drawing_viewer.

  • For computing area or measuring specific entity handles, use manage_entities(operations="area|...").

  • For requesting interactive human mouse clicks in the CAD viewport, use prompt_user.

Modes & Parameters:

• mode: Inspection mode ("summary", "point", "intersections", "snap"). Default: "summary".

  • "summary": Global bounding box, room schedule, layer inventory, and ASCII minimap.

  • "point": Point-in-polygon raycasting query ("what room/space contains point X,Y?"). Requires point="x,y".

  • "intersections": Detect geometric crossings between entities. Optional: handle1, handle2, layer.

  • "snap": Object snap assistant. Finds closest endpoint, midpoint, or center to point. Requires point="x,y".

• point: Coordinates "x,y" or "x,y,z" (required for "point" and "snap" modes).

• handle1: Optional first entity handle to restrict intersection checks.

• handle2: Optional second entity handle to test intersection against handle1.

• snap_types: Comma-separated snap filters: "endpoint", "midpoint", "center". Default: "endpoint,midpoint,center".

• tolerance: Search radius for snap points in drawing units. Default: 1.5.

• layer: Optional layer name to filter intersection candidates.

Returns: JSON string with mode-specific spatial data, coordinates, and matched entities.

Generate and launch an interactive HTML5 CAD Canvas viewer in the web browser.

Behavior:

• Mutation: Strictly read-only for CAD geometry; does not alter drawing database or active viewport.

• Persistence: Saves a standalone HTML viewer file to the configured output directory.

• Side Effects: Writes a self-contained HTML file to local disk. If open_browser is True, spawns an external process to open the system default web browser.

Usage Guidelines:

• When to Use: Call when a human user requests interactive visual exploration, panning/zooming, or clicking on rooms/layers in a graphical UI.

• Sibling Routing / Alternatives:

  • For programmatic spatial queries (bounding box, point raycasting, snap points, ASCII map), use inspect_drawing.

  • For exporting static documents or publication files (vector PDF, BC3, Excel), use export_data.

  • For controlling viewport zoom/camera inside the active CAD software window, use manage_view.

Parameters:

• filename: Output HTML file name or relative path (default: 'visor_cad.html').

• open_browser: Whether to automatically launch default web browser (default: True).

Returns: JSON string with status, absolute HTML file path, entity count, and browser launch result.

Create automated architectural annotations, centroid room labels, and linear dimension chains.

Behavior:

• Mutation: Mutates drawing by generating and placing new annotation text, dimensions, and leaders.

• Persistence: Inserted annotations persist in DWG/DXF database upon save.

• Side Effects: Auto-creates destination annotation layers (e.g. A-ANNO-TEXT, A-ANNO-DIMS) if nonexistent.

Usage Guidelines:

• When to Use: Call to automatically label room centroids with computed areas (m²), generate overall or wall-by-wall linear dimension chains, or add leader callouts with arrowheads.

• Sibling Routing / Alternatives:

  • For manually drafting single primitive dimensions or leaders with custom points, use draw_entities(entities="dimension|... / leader|...").

  • For modifying, moving, restyling, or deleting existing annotation entities, use manage_entities.

  • For room scheduling tables, use manage_entities(operations="area_table|...").

Actions & Parameters:

• "label_spaces": Places text label with room name and computed area at centroid of closed room spaces.

• "auto_dimension": Generates exterior linear dimension chain along bounding box or wall segments.

• "add_leader": Inserts architectural callout leader pointing to specified geometry.

Parameters:

• action: Action to perform ("label_spaces", "auto_dimension", "add_leader"). Default: "label_spaces".

• handles: Optional entity handle or list of handles to annotate. If None, processes all spaces.

• style: Dimensioning style for "auto_dimension" ("overall" for global extents, "segments" for each wall). Default: "overall".

• offset: Offset distance in drawing units between geometry and dimension line. Default: 1.0.

• text_height: Text height for labels and dimensions in drawing units. Default: 0.35.

• prefix: Text prefix added before calculated area value (e.g. "Sup = "). Default: "".

• suffix: Text suffix appended after area value. Default: " m²".

• layer: Target layer name (default: "A-ANNO-TEXT" for space labels, "A-ANNO-DIMS" for dimensions).

• color: Optional color name or ACI number.

Returns: JSON string containing created annotation handles, count, and status.

Manage AutoCAD paperspace layouts, presentation sheets, viewports, and AECO title blocks.

Behavior:

• Mutation: Mutates paperspace configurations, layout dictionaries, and sheet entities.

• Destructive Actions: Flag action="delete" as DESTRUCTIVE; permanently removes target layout sheet and all entities/viewports placed upon it. Cannot delete active layout or "Model" tab.

• Persistence: Layout definitions and viewport scales persist in drawing database upon save.

• Side Effects: Switches active tab in CAD interface when action="activate" or action="create" is called.

Usage Guidelines:

• When to Use: Call to compose architectural presentation sheets, configure standard paper formats (A4-A0), insert scaled modelspace viewports, add standardized title blocks, or switch active sheets.

• Sibling Routing / Alternatives:

  • For adjusting camera zoom, pan, or visual style inside active modelspace viewport, use manage_view.

  • For exporting or plotting finished sheet to vector PDF document, use export_data(format="pdf").

  • For creating 2D/3D geometry in modelspace, use draw_entities.

Actions & Per-Action Required Parameters:

• "create": Create new layout sheet with border frame, viewport, and title block.

  • Required: name, paper_size, orientation, scale.

• "list": List all layouts in drawing with active status.

  • Required: (none).

• "activate": Switch active CAD workspace tab to this layout.

  • Required: name.

• "delete": (DESTRUCTIVE) Permanently delete named layout sheet.

  • Required: name (cannot delete active layout or "Model").

• "add_viewport": Add architectural viewport to existing layout.

  • Required: name, scale. Optional: model_center, viewport_rect.

• "add_titleblock": Add AECO standard title block with metadata.

  • Required: name, title, author, sheet_number.

Parameters:

• action: Action to perform ("create", "list", "activate", "delete", "add_viewport", "add_titleblock"). Default: "create".

• name: Layout sheet name (e.g. "Plano_01_Distribucion").

• paper_size: Paper standard ("A4", "A3", "A2", "A1", "A0", "LETTER", "TABLOID"). Default: "A3".

• orientation: Sheet orientation ("landscape", "portrait"). Default: "landscape".

• scale: Architectural scale ("1:50", "1:100", "1:20", "1:200", "1:500", "1:10", "1:1"). Default: "1:50".

• model_center: Center coordinate in modelspace to focus ("x,y", e.g. "15.0, 10.0").

• viewport_rect: Viewport center and dimensions in paper mm ("cx,cy,w,h", e.g. "210,148,380,260").

• title: Project or sheet title for title block.

• author: Designer, collegiate engineer, or author name.

• date: Date string for title block.

• sheet_number: Sheet index or code (e.g. "PL-01", "1/4"). Default: "1/1".

• unit: Model units ("m" for meters, "mm" for millimeters). Default: "m".

Returns: JSON string with action result, layout details, and success status.