Robert Allan JamesandClaude Sonnet 5
abb858a300
Cluster 4 of the POST-coverage sweep: physics_freeze_words_test.c covers the 6 words proof/StarForth_Physics_Freeze_Words.thy actually gives real lemmas for (FREEZE-WORD, UNFREEZE-WORD, FROZEN?, HEAT!, HEAT@, DECAY-RATE@), correcting an earlier fork summary's wrong "5 words" scope. Writing the tests surfaced two independent, pre-existing bugs in physics_freeze_words.c, both now fixed: - Every address-taking word cast the VM's caddr directly to a host pointer instead of resolving it through vm_ptr() -- caddr is an offset into vm->memory, not a host pointer. Fixed in all 9 call sites (the 5 in-scope words plus SHOW-HEAT, which shares the identical pattern). - Every underflow check used dsp < N (item count) instead of dsp < N-1, since this VM's dsp is a 0-indexed top-of-stack pointer. Fixed in all 6 checks. Together these meant every word in this file taking a stack-supplied name has been broken for any real caller since the file was written. Verified zero build warnings and a clean three-arch QEMU boot (amd64/aarch64/riscv64), 1009 passed / 0 failed / 0 errors identically on all three, dict_hash matching across arches. Co-Authored-By: Claude Sonnet 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 |
init-0.4th … init-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