i think they're linked

docs/notebooks/simulation_basics.ipynb

@@ -0,0 +1,60 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "8163b0cd-276a-4530-99dd-97bc20906b78",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\u001b[32m2024-05-23 17:10:58.325\u001b[0m | \u001b[1mINFO    \u001b[0m | \u001b[36mgdsfactory.pdk\u001b[0m:\u001b[36mregister_cells_yaml\u001b[0m:\u001b[36m376\u001b[0m - \u001b[1mRegistered cell 'sample'\u001b[0m\n"
+     ]
+    }
+   ],
+   "source": [
+    "import sky130\n",
+    "import sky130_hdl21"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c3e4d92b-c3d3-4677-8416-9c23de62b6c9",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "978298fe-2c3e-492a-b037-28a7ffcbe337",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.13"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}

pyproject.toml

@@ -16,9 +16,10 @@ classifiers = [
 ]
 dependencies = [
   "gdsfactory~=7.26.1",
-  "PySpice"
+  "hdl21 @ git+https://github.com/cascode-labs/Hdl21.git@main",
+  "sky130-hdl21 @ git+https://github.com/cascode-labs/Hdl21.git@main#subdirectory=pdks/Sky130"
 ]
-description = "skywater130 pdk"
+description = "Skywater130 PDK compatible with gdsfactory and related."
 keywords = ["python"]
 license = {file = "LICENSE"}
 name = "sky130"

sky130/hdl21.py

@@ -0,0 +1,15 @@
+"""
+Configuration for the hdl21 PDK linking with our source files.
+"""
+import pathlib
+
+import sky130_hdl21
+
+pdk_path = pathlib.Path(__file__).parent / "src" / "sky130_fd_pr"
+model_ref = pdk_path / "models" / "sky130.lib.spice"
+
+sky130_hdl21.install = sky130_hdl21.Install(
+    pdk_path=pdk_path,
+    lib_path=model_ref,
+    model_ref=model_ref,
+)