Core mechanism for §XXXIII's main concurrency block, built and live-verified on amd64. Two new primitives: - WORKER-BIRTH ( capsule-c capsule-u name-c name-u -- ok? ): births a named, VM-EXEC-addressable VM from an arbitrary (p) capsule with no identity involved. Corrects the ratified design's own assumption that the main block would use UNATTENDED-BIRTH -- that requires a committed capsule per identity, impractical for dozens of trial VMs. The concurrency block never needed identity at all. - VM-ERROR? ( c-addr u -- flag ): reads a named VM's error state from Hera, mirroring VM-HEAT's silent/always-returns-a-value contract. Needed to check a VM-EXEC-driven trial VM's own fault state after the fact -- nothing existing let Hera do this. Real bug found and fixed in both WORKER-BIRTH and UNATTENDED-BIRTH: capsule_birth_baby() never calls vm_physics_init() either (same shape as the registry-name gap found building UNATTENDED-BIRTH) -- without it a born VM is never in the VM Fleet Attractor physics list, so VM-HEAT returns 0 forever regardless of work done. Fixed by adding vm_physics_init() alongside the existing registry-name call in both words. Traced (not guessed) why heat still read 0 after one VM-EXEC touch even post-fix: vm_physics_touch()'s transfer logic only fires from a VM's *second* touch onward -- the first touch just records a baseline tick. Verified live across three sequential touches: heat 0 -> 7039 -> 11333. This is a real design requirement for the DoE's heat/CV response variable (each trial must touch a worker at least twice), not a bug to route around. Also found live: all 10 existing workload-N.4th capsules self-execute their full workload at load/birth time (a bare top-level call to their own RUN-* word at file end) -- missed on an earlier, too-shallow 8-line survey of each file. WORKER-BIRTH alone already runs a worker's first pass as a side effect of birth. Verified live on amd64: two concurrent workers (fib + matrix-mul) birthed, run, measured (heat + error state), and killed cleanly; VM-HEAT/VM-ERROR? both confirmed silent-0 on an unknown name. Clean 3-arch qemu boot on the real committed change. Still open: the run-matrix/shuffle/CSV driver capsule itself, the WIREBIND-automation path for the fixed arm, and the per-VM touch-count budget's exact value. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BWpNjdwPtFLuVLaAq44L9K
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