Robert Allan JamesandClaude Sonnet 5
7e2fd9f044
Found while building the analysis report for the ACL-RWT relaunch campaign: cfg=0 was missing from run coverage for 2 of 3 seeds, reproduced identically across all three architectures. Root-caused rather than worked around, per Captain Bob's "this is worrisome." SWAP-MTX (capsules/doe.4th Block 2104) never actually swapped two RUN-MATRIX cells -- it performed a lossy one-way copy (second MATRIX! call mis-targeted mat[i] again instead of mat[j]). Confirmed by direct empirical test on the hosted build: INIT-MATRIX gives mat[0]=0, mat[5]=5; after 0 5 SWAP-MTX, mat[0]=0 (unchanged, should be 5) and mat[5]=0 (correct), with the original value 5 permanently destroyed. Every Fisher-Yates shuffle this mechanism has ever run silently duplicated some values and dropped others -- not a true permutation. Not new, not introduced by item 4.6/Stadium work; predates this session. Fixed with explicit temp variables (SW-I/SW-J/SW-VI/SW-VJ), trivially verifiable by inspection over clever stack juggling. Verified on the hosted build for all three seeds used by the relaunch campaign: each now produces all 16 cfg values exactly 30 times, run_id 0-479 fully distinct. Three-arch QEMU acceptance clean: 1012/0/0 POST on all three, identical dict_hash (expected -- doe.4th isn't C-registered or auto-loaded at boot). BLOCK_MAP.md correctly shows only doe.4th's own hash changed. Also includes the R analysis/chart pipeline (analyse_stadium_relaunch.R) built for the relaunch campaign report, and the three acceptance boot logs. Retroactive caveat: the relaunch campaign's own run-matrix coverage (experiments/bare_metal/runs/acl-rwt-20260820/) is not a valid uniform permutation, having run against the buggy shuffle. Whether to re-run it against the fix is a separate call, not made here. 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