Robert Allan JamesandClaude Opus 5.5
56da55aba9
sk_vm_switch_entry() stops being the Stage-2 placeholder bounce and becomes every switch participant's own idle loop: it drains one of its own kernel-Hermes messages per pass, on its own native stack (driven by the drain's return value, so a non-consuming drain cannot spin), and when nothing is drained it marks the VM parked_idle and yields back. It is entirely OS-driven, with no VM-side yield word. sk_hermes_drain_checkpoint() gains a per-VM hermes_draining guard so a payload's own in-word checkpoint cannot drain a second message inside the first. Still inert in normal operation: nothing marks work until Stage C. Finding fixed here: amd64 sk_vm_switch_prime built the first-entry frame at top-56, entering with rsp 16-aligned instead of the SysV-required 8 mod 16, so the first aligned SSE spill in a callee took #GP (logs/20260923-142526, kept). It had been latent since SXXVIII Stage 2 because the placeholder never called anything. The frame is now at top-64 with a zeroed pad slot. aarch64 and riscv64 were already correct. Evidence: a temporary kernel_main probe (reverted, not in this commit) queued two messages to Hestia, the first calling a colon word, and switched into her. It passed on all three ISAs: 0 pending, parked_idle, depth 0, context saved on her own stack, SB-SEQ=12 (drained one at a time, not nested), ledger and stadium_conserved restored. Formal acceptance without the probe on all three ISAs: dict_hash identical and unchanged, zero UNKNOWN WORD or faults, and the live WIREBIND mint -> USE -> 1 2 + . -> 3 relay. FABRIC-3.8.md also records Captain Bob's rulings that no VM-side word ever gives up control and that multitasking is a compudynamic hybrid, and opens SS3.12 (VM frames for per-VM execution state). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
capsules/
FORTH personality files loaded by the VM at boot. A capsule is an immutable, content-addressed payload; its XXHash64 hash is its identity. Any mutation changes the hash and the birth protocol rejects the image.
Key files
| File | Type | Purpose |
|---|---|---|
init.4th |
(m) MAMA_INIT |
Default Mama VM personality — loaded at LBN 2048 |
ACL.4th |
user | Word-level ACL system; self-activating at boot |
zuse.4th |
user | Bootstrap superuser; loaded by ACL.4th |
doe.4th |
user | DoE workload words (EXEC-DOE) — opt-in |
workload-0.4th … workload-9.4th |
(p) |
Numbered personality variants |
init-l8-*.4th |
(p) |
L8 Jacquard mode variants (stable/volatile/diverse/temporal/transition/omni) |
hermes/init.4th |
(p) |
Hermes baby VM personality |
artemis/init.4th |
(p) |
Artemis baby VM personality |
Block namespace
Block ranges are shared across all loaded capsules — collisions cause silent word-definition overwrites.
| Range | Owner |
|---|---|
| 2048–2099 | init.4th |
| 2100–2199 | doe.4th |
| 3000–3999 | workload capsules |
| 4000+ | user-defined (ACL.4th, zuse.4th, …) |
Each block is limited to 1024 bytes. Verify with wc -c before committing.
See also
experiments/bare_metal/README.md— DoE protocols and block namespace rulesdocs/03-architecture/word-acl/DESIGN.md— ACL system designtools/mkcapsule.c— assembles capsules intocapsule_generated.c- Project root