Robert Allan JamesandClaude Sonnet 5
66beae7fd4
Implements the message-arrival eligibility signal FABRIC-3.md §XXVIII.1 left open (has_work per-slot flag, set via new SWITCH-MARK-WORK primitive from MSG-SEND) so an idle VM never becomes a switch target purely by waiting out the readiness threshold. Also root-causes and fixes a second, independent switch-storm: the tick's "who is current" check used vm_log_attributed_vm(), which can't see a VM parked in switch.c's own raw trampoline. Replaced with a dedicated g_switch_current_vm tracked by the switch mechanism itself, and moved target-slot eligibility reset to the switch decision point instead of relying on ISR polling to observe a window that can be only a few instructions wide. Verified live on all 3 architectures: clean boot to zuse@Hera] ok>, live cross-VM message dispatch, and (since a quiet log looks identical to a livelocked storm once the DoE probe is gone) confirmed genuine REPL liveness via QMP send-key + screendump on aarch64/riscv64, not log inspection alone. 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