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>

docs/audits/jacobian-health-report.json

@@ -0,0 +1,60 @@
+{
+  "story": "0-5-domain-sweep-jacobian-health-gate",
+  "date": "2026-07-18",
+  "gate_command": "cargo test -p entropyk-components --test jacobian_health_sweep",
+  "allow_list": [],
+  "surfaces": [
+    {
+      "surface_id": "valve_flow",
+      "regions": ["opening_grid_x_dp_regimes"],
+      "models": ["IsenthalpicOrifice", "ExvCdA"],
+      "config": "helper",
+      "status": "clean"
+    },
+    {
+      "surface_id": "exv_orifice",
+      "regions": ["dp_positive_opening_*", "dp_le_0_opening_*"],
+      "openings": [0.0, 0.5, 1.0],
+      "config": "EDGE_CFG",
+      "h_floor": 1e-6,
+      "rel_tol": 1e-4,
+      "status": "clean"
+    },
+    {
+      "surface_id": "condenser_fan",
+      "regions": ["fan_phi_0.005", "fan_phi_0.75", "fan_phi_1.495"],
+      "config": "EDGE_CFG",
+      "status": "clean"
+    },
+    {
+      "surface_id": "condenser_flood",
+      "regions": ["flood_lambda_0.005", "flood_lambda_0.5", "flood_lambda_0.975"],
+      "config": "EDGE_CFG",
+      "status": "clean"
+    },
+    {
+      "surface_id": "two_phase_quality",
+      "regions": ["interior", "near_band", "exterior"],
+      "config": "helper",
+      "status": "clean"
+    },
+    {
+      "surface_id": "msh_dome_edge",
+      "regions": ["quality_grid_X_BLEND_to_1"],
+      "config": "central_fd_msh_gradient",
+      "status": "clean"
+    }
+  ],
+  "deferred_not_probed": [
+    "exchanger_4port_nfr9",
+    "python_components_stubs",
+    "screw_economizer_incomplete_j",
+    "sat_domain_p1",
+    "bphx_correlation_p2"
+  ],
+  "nfr11_attribution": {
+    "status": "pending_story_2_6",
+    "before_after_delta": null,
+    "note": "Epic 0 P0 C1/phantom regularization landed; measure first-try % with Story 2.6"
+  }
+}