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/pump.md

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+# Pump
+
+Config type: `"Pump"`  
+Source: `crates/components/src/pump.rs`
+
+---
+
+## EN
+
+### Purpose & model
+
+Liquid pump with **head/power curves** vs volume flow and speed. Typestate connect pattern like Fan.
+
+```
+ΔP = ρ · g · H(Q, N)
+Ẇ  = f_power(Q, N)
+```
+
+### Residuals & `n_equations()`
+
+Head residual + energy/power residual as implemented; see source `n_equations()`.
+
+### Ports
+
+`inlet` / `outlet` on liquid (brine/water) branch.
+
+### DoF warning
+
+Do **not** impose `m_flow_kg_s` on a BrineSource **and** a pump curve on the same branch without freeing one — over-constrained loop.
+
+### Calibration
+
+Curve scale factors when exposed (default 1.0).
+
+### JSON (main)
+
+| Key | Meaning | Default |
+|-----|---------|---------|
+| curves / preset | H–Q map | required |
+| speed | operating speed | – |
+
+---
+
+## FR
+
+### But & modèle
+
+**Pompe** liquide sur courbes H–Q.
+
+### Attention DoF
+
+Ne pas imposer ṁ Source **et** courbe pompe sur la même branche.
+
+### Ports / JSON
+
+Voir EN.