Replaces the global g_vm_interpret_depth test at both execute_colon_word()
checkpoints (kernel-Hermes drain, switch-signal take) with
sk_vm_owns_outermost_frame(vm): the VM physically owns the stack
(sk_vm_switch_current_vm() == vm), is at its own outermost vm_interpret()
frame (new per-VM VM.interpret_depth), and is not compiling. Once VMs
interleave on their own native stacks, a global depth count across all VMs
no longer means "this VM owns this stack"; this is the invariant it was
approximating. The global and the old function stay until Stage I.
Acceptance, all three ISAs, foreground with the framebuffer visible, coupled
disk images reset before each: zero UNKNOWN WORD, zero self-test failures,
dict_hash identical across ISAs and unchanged from the pre-Stage-A boot, and
the live WIREBIND mint -> attach -> USE -> 1 2 + . -> 3 relay with
stadium_conserved(self)=true. Logs: 20260923-140120 (amd64), -140654
(aarch64), -141303 (riscv64).
FABRIC-3.8.md also records Captain Bob's ruling that preemption comes from
the compudynamics, not the timer: principle 5 is corrected and the design
question is opened as SS3.11, to be ruled before Stage C.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The per-ISA amd64 campaign (12345 3 S" amd64" DOE) was stopped ~49 min in,
zero trials complete: its harness drives workers by synchronous VM-EXEC on
Hera's stack, so the concurrency factor counted resident VMs while execution
stayed serialized. Tracing further showed the v2.1.0 reshuffle stops short of
real concurrency: kernel-Hermes never publishes eligibility (no mark_work in
sk_hermes_send_one), the switch trampoline is still the Stage-2 placeholder,
delivery to passive VMs still goes through the idle pump, only Tripod/WIREBIND
VMs are switch participants, and the stack-ownership gate is a single global.
FABRIC-3.8.md records the gap analysis and a staged A-I design, each stage its
own commit and 3-arch acceptance. FABRIC-3.md SXXXV.16 points to it. Logs and
extracted CSVs from today's boots and the stopped run are kept as audit
artifacts.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
