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/flooded-condenser.md

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+# FloodedCondenser
+
+Rust / SystemBuilder type: `FloodedCondenser`  
+Source: `crates/components/src/heat_exchanger/flooded_condenser.rs`
+
+---
+
+## EN
+
+### Purpose & model
+
+Flooded condenser on an inner `HeatExchanger<EpsNtuModel>` with optional **subcooling control** residual:
+
+```
+SC = (h_f(P) − h_out) / cp_l     # when subcooled
+r_SC = SC − SC_target
+```
+
+### Residuals & `n_equations()`
+
+Base ≈ 3 (inner HX path); **+1** with subcooling control (default target ~5 K).
+
+> **Status:** Prefer production **`Condenser` + `emergent_pressure`** for water-cooled machines. FloodedCondenser may lag the dual-mode / DoF discipline of FloodedEvaporator — treat as partial until fully aligned.
+
+### Ports
+
+Refrigerant + secondary via inner exchanger / 4-port names when wired.
+
+### Calibration
+
+Inner calib `z_ua` (default 1.0) when exposed.
+
+---
+
+## FR
+
+### But
+
+Condenseur **noyé** avec option de contrôle de sous-refroidissement.
+
+### Statut
+
+Préférer **`Condenser` + pression émergente** en production. Fiche partielle tant que le DoF n’est pas aligné sur FloodedEvaporator.
+
+### Calibration
+
+Z_UA = 1 si exposé.