klayoutclawgeometry

name

klayoutclaw:geometry

description

Create geometry in KLayout via MCP — rectangles, polygons, paths, cells, and cell instances. Use this skill whenever the user wants to draw, add, or create shapes/geometry/structures in KLayout, even if they don't say "geometry" explicitly. Trigger on phrases like "draw a rectangle", "add a polygon", "create a cell", "place an instance", "make a shape", or any layout/chip/mask design geometry task.

KLayout Geometry Skills

CLI scripts for creating geometry in KLayout via the MCP server's execute_script tool.

Each script connects to KLayout at 127.0.0.1:8765 and runs pya code to create shapes.

Prerequisites

• KLayout running with KlayoutClaw plugin (v0.3+)
• A layout must be open (use create_layout tool first)

Scripts

All scripts live in scripts/ relative to this skill. Coordinates are in microns.

add_rect.py — Add a rectangle

python scripts/add_rect.py <cell> <layer> <datatype> <x1> <y1> <x2> <y2>

Example: python scripts/add_rect.py TOP 1 0 -50 -12.5 50 12.5

add_polygon.py — Add a polygon

python scripts/add_polygon.py <cell> <layer> <datatype> <x1,y1> <x2,y2> ...

Example: python scripts/add_polygon.py TOP 1 0 0,0 10,0 10,10 0,10

add_path.py — Add a path with width

python scripts/add_path.py <cell> <layer> <datatype> <width> <x1,y1> <x2,y2> ...

Example: python scripts/add_path.py TOP 1 0 5 0,0 50,0 50,50

create_cell.py — Create a new cell

python scripts/create_cell.py <cell_name>

Example: python scripts/create_cell.py CONTACT_PAD

add_instance.py — Place a cell instance

python scripts/add_instance.py <parent> <child> [x] [y]

Example: python scripts/add_instance.py TOP CONTACT_PAD 100 200

Workflow

For simple shapes, call scripts directly. For complex designs with many shapes, prefer calling execute_script via MCP with a single Python block — this avoids per-shape HTTP round trips and is much faster.

# Example: batch geometry via execute_script
tool_call("execute_script", code="""
dbu = _layout.dbu
li = _layout.layer(1, 0)
for x in range(0, 100, 10):
    _top_cell.shapes(li).insert(pya.Box(int(x/dbu), 0, int((x+5)/dbu), int(5/dbu)))
""")