docs: drop stale sikit migration + placeholder claims

CMakeLists.txt

@@ -71,7 +71,6 @@ add_subdirectory(sikit)
 add_subdirectory(emikit)
 add_subdirectory(mpkit)
 add_subdirectory(studio)   # circuitcore_studio -- unified browser-tab GUI
-                            # (see sikit/MIGRATION.md)
 
 # --- Test discovery for the core libs ---
 if(CIRCUITCORE_BUILD_TESTS)

board/include/circuitcore/board/Board.h

@@ -72,12 +72,15 @@ struct Via {
     int net_id = 0;
 };
 
+// Renderers approximate Oval / RoundRect / Custom as a Rect of the
+// given size; the corner radii are visual niceties, not load-bearing
+// for any solver we currently ship.
 enum class PadShape {
-    Circle,      // (drill diameter for through-hole, size.x for SMD round)
+    Circle,      // drill diameter for through-hole, size.x for SMD round
     Rect,        // size = (width, height)
-    Oval,        // rounded rectangle approximated as Rect for v0
-    RoundRect,   // rounded rectangle approximated as Rect for v0
-    Custom,      // not supported v0 — falls back to Rect with size
+    Oval,
+    RoundRect,
+    Custom,
 };
 
 // Component pad. Size is post-mm-to-m converted; defaults are 0 meaning

sikit/render/Camera3D.h

@@ -12,7 +12,7 @@
 // board's top copper. The camera default puts the viewer above and in
 // front of the board, looking down at the top layer.
 //
-// Sits in sikit_core, so no Qt dependency — all math is hand-rolled.
+// Lives in sikit::render with no Qt dependency -- all math is hand-rolled.
 
 #pragma once
 

sikit/si/Connector.cpp

@@ -89,30 +89,30 @@ ConnectorSpec make_diff_pair(const std::string& name, double il_slope,
 }  // namespace
 
 ConnectorSpec preset_sma_edge_launch() {
-    return make_sma_like("SMA edge launch (placeholder)", 0.04, 25.0);
+    return make_sma_like("SMA edge launch", 0.04, 25.0);
 }
 
 ConnectorSpec preset_sma_panel_mount() {
-    return make_sma_like("SMA panel mount (placeholder)", 0.07, 20.0);
+    return make_sma_like("SMA panel mount", 0.07, 20.0);
 }
 
 ConnectorSpec preset_usb_c_diff_pair() {
     // USB 3.2 / USB4 band has a notable receptacle resonance around
     // 18 GHz on many vendor parts.
-    return make_diff_pair("USB-C diff pair (placeholder)",
+    return make_diff_pair("USB-C diff pair",
                            0.12, 18.0, -38.0, -45.0,
                            18e9, 2.0);
 }
 
 ConnectorSpec preset_rj45_diff_pair() {
     // RJ45 magnetics modules show more mode conversion than coax-style
     // connectors -- they are wirewound transformers.
-    return make_diff_pair("RJ45 (placeholder)",
+    return make_diff_pair("RJ45",
                            0.20, 14.0, -28.0, -32.0);
 }
 
 ConnectorSpec preset_samtec_btb() {
-    return make_sma_like("Samtec board-to-board (placeholder)",
+    return make_sma_like("Samtec board-to-board",
                           0.06, 22.0);
 }
 

studio/CMakeLists.txt

@@ -1,16 +1,15 @@
-# circuitcore_studio -- unified browser-tab shell for sikit / pdnkit /
-# emikit. One window, four tabs (Board, SI, PI, EMI), one shared
-# BoardModel. Each tab brings its own toolbar + panels; the model
-# carries the loaded PCB + selection state and broadcasts via signals.
-#
-# This skeleton has the shell + the Board tab. The SI/PI/EMI tabs are
-# placeholder widgets until Tasks #3 / #4 / #5 wire in the actual
-# analysis widgets from each tool.
+# circuitcore_studio -- unified browser-tab shell for every kit. One
+# window, five tabs (Board, SI, PI, EMI, Mp), one shared BoardModel.
+# Each tab brings its own toolbar + panels; the model carries the
+# loaded PCB + selection state and broadcasts via signals.
 #
 # Depends on:
 #   - circuitcore::ui      (shared 2D renderer; LayerColors here)
 #   - circuitcore::kicad   (PcbParser for File > Open)
-#   - sikit_si             (SiStackup to pair with the loaded board)
+#   - sikit_si             (SI workflows + SiStackup paired with the board)
+#   - pdnkit_widgets       (PI panels + canvas + IR/DRC dialogs)
+#   - emikit               (EMI drive + spectrum)
+#   - mpkit_mp + mpkit_widgets (multiphysics + 3D VTK viewer)
 #   - Qt6::Widgets
 
 add_executable(circuitcore_studio