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/components/moving-boundary-hx.md

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+# MovingBoundaryHX
+
+Source: moving-boundary / multi-zone HX identification helpers
+
+---
+
+## EN
+
+### Purpose & model
+
+Research / identification path: multi-zone (SH / TP / SC) UA allocation feeding an ε-NTU or zone energy balance. **Not** the default production Condenser/Evaporator path.
+
+### Residuals
+
+Zone energy balances + interface quality/enthalpy consistency when fully enabled. Coverage may be partial — check source and tests before relying in production machines.
+
+### Correlations
+
+Zone UA may come from geometry or identified parameters rather than a single Longo map.
+
+### Recommendation
+
+Production chillers: use **Condenser**, **Evaporator**, **FloodedEvaporator**, or **BPHX** with documented dual-mode secondary and DoF discipline.
+
+---
+
+## FR
+
+### But
+
+HX **moving-boundary** multi-zones (recherche / identification).
+
+### Recommandation
+
+En production : Condenser / Evaporator / Flooded / BPHX.