One boot, v4/system/boot.c, for both products: it starts the nucleus image, finds each capsule in the baked capsule directory, recomputes its hash, checks its signature, gives its blocks to the node a line at a time, and prints PARITY:V4_NUCLEUS, PARITY:V4_CAPSULE and PARITY:OK before the prompt. A line the node does not accept ends the boot with the capsule, block and line named. docs/v4.0.0/NUCLEUS.md. - hosted Linux product for amd64, aarch64 and riscv64 (make -C v4 hosted); make -C v4 hosted-check boots all three and requires identical output - the kernel's v4 entry (STARFORTH_V4=1) calls the same boot - capsules/v4/forth79.4th, block 6000: no definitions yet - mkimage builds the nucleus only; no FORTH source is compiled at build time - capsule_blocks.c: the Block-header parse, free of any VM, for every loader Verified: make -C v4 test passes; hosted-check passes on the three ISAs with the same hashes; the kernel compiles with STARFORTH_V4=1 on the three. Not verified: no bare-metal boot of v4 has been run. 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