Coolant-loop cross-check vs the 1995 manual: structure strongly faithful

Dumped each mech's subsystem->coolant-loop (BT_SPEC_LOG in mech4: walks
the roster once, resolves each subsystem's linked-condenser number via
BTCoolingLoopFrame) and diffed all 6 manual mechs' COOLANT LOOPS tables.

RESULT -- the structure survives the 4.0->4.10 gap remarkably well:
- BACKBONE identical on ALL 6: Generator A/B/C/D on loops 1/2/3/5,
  Sensors(our Avionics) on loop 2, Myomers on loop 5, LRMs on 1&3,
  autocannon on 4, big energy weapon on 6 -- exact match
- weapon LOADOUT identical on 5 of 6 (Thor/Vulture/MadCat/Owens/
  Blackhawk); Loki is the one full rework (4.0 PPCx2/AFC100/SRM6 ->
  4.10 AFC50x2/ER Medium x2/SRM4)
- the consistent 4.0->4.10 change is a small-laser REDISTRIBUTION: the
  2 ER Small Lasers moved off the sensor/heavy loops onto the energy
  loops 4&6 (Thor/MadCat/Vulture); Owens near-perfect (loops 1&3 exact)
- Loop 0 = correctly UNCOOLED infrastructure (condensers, reservoir,
  gyro, torso, HUD, ammo bins, ...) -- not a coolant loop

CONCLUSION: the coolant-loop reconstruction is faithful; every diff is
4.0->4.10 balance tuning, not a bug.  BT_SPEC_LOG retained.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

game/reconstructed/mech4.cpp

@@ -2514,6 +2514,28 @@ void
 		AuthenticGroundAndCollide(dt, preMovePos);
 	}
 
+	// SPEC AUDIT (BT_SPEC_LOG): once, after all subsystems are built + linked,
+	// dump each subsystem -> coolant loop (BTCoolingLoopFrame resolves the
+	// linked condenser's number, the manual's "Loop N").  Diffs the per-mech
+	// COOLANT LOOPS table vs the 1995 manual (structural, less tuning-prone).
+	if (isPlayerMech && getenv("BT_SPEC_LOG"))
+	{
+		static int s_specDumped = 0;
+		if (!s_specDumped && dt > 0.0001f)
+		{
+			s_specDumped = 1;
+			extern int BTCoolingLoopFrame(void *subsystem);
+			for (int i = 0; i < GetSubsystemCount(); ++i)
+			{
+				Subsystem *s = GetSubsystem(i);
+				if (s == 0) continue;
+				DEBUG_STREAM << "[spec] loop " << BTCoolingLoopFrame(s)
+					<< " <- " << (s->GetName() ? s->GetName() : "?")
+					<< "\n" << std::flush;
+			}
+		}
+	}
+
 	if (isPlayerMech && dt > 0.0001f && dt < 0.5f)		// ignore zero / huge (stall) slices
 	{
 		// --- VIRTUAL CONTROLS (dev keyboard -> the pod's analog inputs) --------