Programm architecture simplified so that the EDA can now run individually without generation of .gds file

README.md

@@ -7,4 +7,18 @@ Organization : OptiHK Limited
 # mxpic_EDA
 The EDA coding for the layout for optihk
 # requirements
-flask
+flask
+
+## Build-Time Router Stack
+
+Login, dashboard, canvas editing, YAML generation, and PDK browsing run without
+importing `mxpic_router` or `mxpic_forge`. Build actions require the matched
+`mxpic_router` and `mxpic_forge` checkouts; SVG preview generation also requires
+`gdstk`.
+
+## PDK and Technology Roots
+
+PDK component assets and `technology.yml` manifests are loaded from the same
+role-scoped PDK roots. Normal users and developers use
+`MXPIC_PDK_PUBLIC_ROOT` or `../opt_pdk_public/foundries`; managers use
+`MXPIC_PDK_ATLAS_ROOT` or `../opt_pdk_atlas/foundries`.