Snapshot WIP: solver HP epic progress, BPHX/HX physics, BMAD skill refresh.

Capture uncommitted solver robustness work (regularization, domain errors, linear solver lifecycle, tube DP/MSH), web workbench updates, and synced BMAD skills across IDE agent folders before starting BPHX pressure-drop.

Co-authored-by: Cursor <cursoragent@cursor.com>

.entropyk/modules/DualCircuit.ekmod

@@ -0,0 +1,16 @@
+{
+  "params": {},
+  "components": [],
+  "edges": [],
+  "ports": {
+    "plant_chw_in": "splitter:outlet_a",
+    "plant_chw_out": "merger:inlet_a"
+  },
+  "instances": [
+    {"of": "BaseChiller", "name": "c1", "circuit": 0, "params": {}},
+    {"of": "BaseChiller", "name": "c2", "circuit": 0, "params": {"ua_cond": 800}}
+  ],
+  "connections": [
+    {"from": "c1.chw_out", "to": "c2.chw_in"}
+  ]
+}