torso twist died after a respawn: Myomers ran the inner integrator, never the wrapper

Gitea #70. Torso twist intermittently stops working after a death/respawn and
stays stopped, with the generator at a full 10000V and the voltage link
resolving fine. A stale state, not a live one.

The Torso is a PowerWatcher that mirrors the electrical level of the subsystem
it watches -- for the MadCat that is roster slot 15, Myomers -- and
torso.cpp:570 holds effectiveTwistRate at 0 whenever that mirrored level is not
Ready. So the question was never about the torso. It was: why does Myomers sit
at NoVoltage forever?

Because it never ran the state machine that would walk it back. The Myomers ctor
@004b8fec stores [0x511620] into activePerformance, and that pointer resolves to
0x4b8b9c -- whose first instruction is `call 0x4b0bd0`, which is
PoweredSubsystem::PoweredSubsystemSimulation. @004b8d18, the function this port
had registered, is the INNER drive-heat integrator that wrapper goes on to run.
We registered the inside of the onion. PoweredSubsystemSimulation is the only
code that both enters NoVoltage (source == 0) and leaves it
(NoVoltage -> Starting -> Ready), so a Myomers that lost power during the
death/reset window had no way back out.

Order is load-bearing: the base call precedes the heat-model gate in the binary.
Gating first -- as this did -- also denied the electrical machine to every
non-expert pilot, since OwnerAdvancedDamage() reads the +0x260 heat-model flag
and that is off below veteran.

Measured with BT_SELF_DAMAGE + BT_TORSO_LOG, before and after:

  pristine, before  48/48 Ready    after  38/38 Ready
  post-respawn      95/97 Ready           89/89 Ready

Two dead windows per respawn, now none, and the clean case stays clean.

The wrapper has a tail this does not yet reconstruct: @004b8bb9-0x4b8c1e runs an
effect when electricalStateAlarm == 1 and the myomer's damage zone is below 1.0,
building a small vector (const 0xbc343958, about -0.011f) against the owner's
localOrigin@0x100. Almost certainly the un-powered movement penalty. Flagged in
the KB as T4 rather than guessed at.

Worth generalizing, and noted as such in context/subsystems.md: when a
subsystem's Performance address in a PTR_LAB_* slot does not match the function
we reconstructed, suspect a wrapper that chains the base sim. The whole family
does it -- Generator and PoweredSubsystem both lead with
HeatSink::HeatSinkSimulation, and the Torso's own perf @004b5cf0 leads with
UpdateWatch.

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

context/subsystems.md

@@ -67,6 +67,26 @@ Making a base byte-exact GROWS every subclass — they must be re-based TOGETHER
 - **WAVE 5** — Torso (aim twist/elevation; joint-I/O reconstructed; the BLH record disables torso →
   faithfully no visible twist).
 - **WAVE 6** — Myomers (mover-coupled; structural un-stub is INERT — no live mover/heat coupling).
+  ⚠ **The registered Performance is the WRAPPER @004b8b9c, not the inner integrator @004b8d18**
+  [T1, fixed 2026-07-28]. The ctor @004b8fec stores `[0x511620]` into activePerformance, and that
+  pointer resolves to `0x4b8b9c`, whose first instruction is `call 0x4b0bd0` =
+  `PoweredSubsystem::PoweredSubsystemSimulation`; @004b8d18 is the drive-heat integrator it then
+  runs. The port had registered the INNER function, so Myomers never advanced its own electrical
+  state machine — and since that machine is the only thing that both enters `NoVoltage`
+  (`source == 0`) and walks it back (`NoVoltage → Starting → Ready`), a Myomers that lost power in
+  the death/reset window stayed there **forever**. The Torso is a PowerWatcher that MIRRORS its
+  watched subsystem, so `torso.cpp:570` held `effectiveTwistRate` at 0 = **Gitea #70, "torso twist
+  stops working after a death/respawn."** Measured: 2 dead windows per respawn before, 0 after;
+  pristine missions never showed it. **Order is load-bearing** — the base call precedes the
+  heat-model gate, and gating first also denied the electrical machine to every non-expert pilot
+  (`OwnerAdvancedDamage()` is the +0x260 flag, off below veteran).
+  **General rule this establishes:** when a subsystem's Performance address in a `PTR_LAB_*` slot
+  does not match the function you reconstructed, check whether the real target is a wrapper that
+  chains the base sim — the whole family does (`Generator`/`PoweredSubsystem` lead with
+  `HeatSink::HeatSinkSimulation`; the Torso's own perf @004b5cf0 leads with `UpdateWatch`).
+  Still unreconstructed [T4]: @004b8bb9-0x4b8c1e, an effect when `electricalStateAlarm == 1` and the
+  myomer's damage zone is < 1.0, building a small vector (const `0xbc343958` ≈ -0.011f) against the
+  owner's `localOrigin@0x100` — almost certainly the un-powered movement penalty.
 - **WAVE 7** — projectile/missile weapons (byte-exact; flying projectiles are a PORT reconstruction —
   the 2007 Entity is 0x1BC vs the binary's 0x300, so raw base-offset reads fail).
 - **TASK #56 (2026-07-11)** — Gyroscope LIVE byte-exact (ctor @004b3778, sizeof 0x3D0 locked;

game/reconstructed/myomers.cpp

@@ -186,8 +186,12 @@ Myomers::Myomers(
 	// their accessors return neutral defaults directly.  The mover handle lives at
 	// base+0x110 (not a Myomers own field); the coupling is inert, so no init here.
 
-	// Register the per-tick Performance.  The binary ctor @004b8fec stores the
+	// Register the per-tick Performance.  NB [0x511620] resolves to @004b8b9c,
-	// MyomersSimulation pointer-to-member into activePerformance (this[7..9] =
+	// the WRAPPER (which calls PoweredSubsystemSimulation @0x4b0bd0 first and
+	// then the drive-heat integrator @004b8d18) -- our MyomersSimulation plays
+	// the wrapper's role and chains the base itself; see the note on its body.
+	// The binary ctor @004b8fec stores that
+	// pointer-to-member into activePerformance (this[7..9] =
 	// PTR_LAB_00511620 / DAT_00511624 / DAT_00511628) under the live-master
 	// guard (owner segment flags & 0xC)==0 && (flags & 0x100) -- the exact same
 	// shape as the Gyroscope/Torso ctors (gyro this[7..9]=PTR_FUN_0050fe08,
@@ -480,6 +484,44 @@ Logical Myomers::HasVoltage(Subsystem *source)
 //
 void Myomers::MyomersSimulation(Scalar time_slice)
 {
+	//
+	// CHAIN THE BASE FIRST (2026-07-28).  The registered Performance in the
+	// binary is @004b8b9c, NOT @004b8d18: the ctor @004b8fec stores
+	// [0x511620] into activePerformance, and that pointer resolves to
+	// 0x4b8b9c, whose FIRST act is `call 0x4b0bd0` =
+	// PoweredSubsystem::PoweredSubsystemSimulation.  @004b8d18 is the INNER
+	// drive-heat integrator it goes on to run.  The port had registered the
+	// inner function and dropped the wrapper, so Myomers never advanced its
+	// own electrical state machine.
+	//
+	// WHY IT MATTERS: NoVoltage is only ever entered by that machine
+	// (`source == 0`), and only that machine walks it back
+	// (NoVoltage -> Starting -> Ready).  With the machine never running, a
+	// Myomers that lost power during the death/reset window stayed at
+	// NoVoltage forever -- and the Torso is a PowerWatcher that MIRRORS the
+	// watched subsystem's electrical level, so torso.cpp:570 held
+	// effectiveTwistRate at 0.  That is Gitea #70, "torso twist stops working
+	// after a death/respawn".  Measured: 0 dips in 48 samples on a pristine
+	// mission, dips lasting seconds after a respawn, with the generator at a
+	// full 10000V and the voltage link resolving fine -- a stale state, not a
+	// live one.  Every sibling chains its base the same way (Generator and
+	// PoweredSubsystem both call HeatSink::HeatSinkSimulation first; the
+	// Torso's own registered perf @004b5cf0 leads with UpdateWatch).
+	//
+	// ORDER IS LOAD-BEARING: the base call precedes the heat-model gate in the
+	// binary.  Gating first (as this did) also denied the electrical machine
+	// to every NON-EXPERT pilot, since OwnerAdvancedDamage() is the +0x260
+	// heat-model flag and that is off below veteran.
+	//
+	PoweredSubsystemSimulation(time_slice);				// @004b8bab -> call 0x4b0bd0
+
+	// UNRECONSTRUCTED [T4], flagged not guessed: @004b8bb9-0x4b8c1e runs an
+	// additional effect when electricalStateAlarm == 1 (NoVoltage) and the
+	// myomer's own damage zone is below 1.0 -- it builds a small vector
+	// (constant 0xbc343958 ~= -0.011f) against the owner's localOrigin@0x100.
+	// Almost certainly the un-powered myomer movement penalty.  Not written
+	// here; it needs its own decode.
+
 	if (!OwnerAdvancedDamage())							// FUN_004ad7d4 gate
 		return;