Robert Allan JamesandClaude Sonnet 5
5c5896fbc1
mama_word_use()'s two silent vm->error=1 guards (dsp<1 stack underflow, NULL from vm_ptr()) now print a diagnostic and return, matching the function's other five guards. Live verification of that fix alone surfaced a bigger problem: with the guard no longer silent, the REPL proceeds to interpret the leftover token as an unrecognized word, which independently sets vm->error, and sk_repl_step()/sk_repl_run()'s Hera-branch still hard-halted on that. Investigated kernel_main.c's boot/capsule-load paths directly: they already catch and clear mama->error entirely separately, before sk_repl_run() is ever entered -- so the "no fallthrough surface" halt in these two REPL functions was never protecting a boot-time fault, only an ordinary interactive REPL-turn one. Both functions now recover unconditionally on any VM's error, Hera included, matching how a redirected (WIREBIND/USE'd) identity's session already recovered. Removed the now-fully-unused sk_fault_handler(). Verified live, amd64: USE rajames at Zuse's own console prints the new diagnostic, then "VM fault -- session recovered, resuming", console stays interactive afterward. Three-arch clean qemu acceptance passed before and after the Hera-fault-scoping change. 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