Robert Allan JamesandClaude Sonnet 5
d1547ecdae
Loads turtle.4th and doe.4th, defines SDK-VERSION/SDK-HELP into an SDK vocabulary, then calls FENCE once everything is loaded -- protecting the base wordset and both cookbook capsules from FORGET. Kernel-only (EXEC doesn't exist hosted), REPL-invoked via S" sdk.4th" EXEC, not part of init.4th's boot sequence. Verified before writing the capsule, not assumed: VOCABULARY/DEFINITIONS does not actually scope word visibility in this interpreter -- vm_find_word is a flat dictionary scan that never consults CONTEXT/CURRENT. Documented plainly in the HOWTO so this isn't mistaken for namespace isolation later. Block range 5109-5115 -- discovered along the way that user-block space is capped at [2048, 5120) by mkcapsule, tighter than expected. Verified: mkcapsule --lint clean, hosted-build trace runs SDK-HELP with zero attributable VM errors, zero build warnings and identical 1012/0/0 POST results with matching dict_hash on all three kernel architectures. HOWTO: docs/working/architecture/SDK-HOWTO-20260819.md 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