Heat: authentic 1e7-unit heat + the ambient radiator land (task #9)

- Emitters: heatPortion closed form = heatCostToFire x 1e7 x (charge/seekV)^2
  (PPC 1.1e8 -> +632K on its own sink); the missing projectile/missile heat
  adds (raw -- resources author pre-scaled 1e7 units).
- The bank's AMBIENT RADIATOR @4ae73c reconstructed (the system's ONLY heat
  exit; conductance x 0.1 x HeatSinkCount -- _DAT_004ae974 float80 = 0.1) +
  the link-attach guard corrected (skip = the 0xBBE bank, not Condenser; the
  inversion blocked condenser->bank links and closed the system).
- Constant corrections (all byte-verified float80s): coolant epsilons
  0.0025/0.003/1e-4 (was a single 1e-4 serving three sites);
  CoolantCapacityScale 0.05 (was 1.738).
- Verified: heat flows + exits; max-rate autofire overheats weapons into the
  authentic heatLoad range-cutout (thermal spam unsustainable by design).
- KNOWN REMAINING: linked-sink routing scrambled (heat pools in Condenser1;
  authored map says PPC->C4/C6) -- the heat-stream offset audit, filed.

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

context/open-questions.md

@@ -165,6 +165,27 @@ authentic path scoped.
   LODReuseHysteresis corrected 0.82→0.33 (a double); the MP beam-kill live-verify awaits a
   clear-sightline spawn (mechanism identical to solo; force-dmg cross-pod cycles verified).
 
+- **HEAT (task #9, 2026-07-11): authentic 1e7-unit heat LIVE; conduction ROUTING defect
+  remains [T2/T3].**  Landed + byte-anchored: emitters emit `heatCostToFire x 1e7 x
+  (charge/seekV)^2` (closed form; PPC = 1.1e8 -> +632 K on its 174000-mass sink); the missing
+  projectile/missile heat adds (raw pre-scaled resources); the bank's AMBIENT RADIATOR @4ae73c
+  (the system's only heat exit: relax toward 300 K, conductance x 0.1 x HeatSinkCount
+  [_DAT_004ae974 float80 = 0.1 -- the audit's "1.7375" was a misread]); the link-attach guard
+  corrected (skip = the 0xBBE bank, NOT Condenser -- the inversion had closed the system);
+  three coolant epsilon corrections (0.0025/0.003/1e-4 for the old single 1e-4) +
+  CoolantCapacityScale = 0.05 float80 (both prior readings wrong).  Verified: heat flows,
+  exits (~2/3 of a 1e10 spam run drained), weapons overheat under max-rate autofire exactly
+  as the authored-constant simulation predicts (thermal spam is unsustainable BY DESIGN;
+  heatLoad -> effectiveRange 0 = the authentic overheat cutout).  **REMAINING DEFECT: the
+  linked-sink ROUTING is scrambled** -- both PPCs' heat pools in Condenser1 (observed 6800 K)
+  while their AUTHORED condensers (PPC_1->C4, PPC_2->C6) sit at 72 K; heat.hpp:186 already
+  notes the heat-stream parse reading neighbouring fields for thermalMass/heatSinkIndex --
+  audit the type-0x11/heat-family stream offsets + the "+2-biased" index resolve.  Also
+  [T4]: who reads FailureHeat to BLOCK firing; the HeatWatcher/AmmoBin cook-off watchedLink;
+  the mech-level heatAlarm@0x450 producer.  KB sweep pending: the "Heat MFD authentically
+  NEAR-STATIC" claim (gauges-hud.md) was computed at the degenerate scale -- at authentic
+  scale the MFD is dynamic.
+
 ## Locomotion / combat polish (non-gating)
 - Authentic per-mech TURN-RATE constant (currently a bring-up constant rate).
 - Body-callback gimp handlers (states 16-19, targets 0x70b2/0x7161 undecoded → fall back to stand);