Plan 2026-10-20 (ENGINE step 4), Task A2, for #189. Captain Bob,
2026-11-13: "The ten"; "Accept it".
- compile.f18 (COMPILE,): a word is copied in line only when it is flagged
in-line and compile-only (24) -- the ten that work on the return stack,
>R R> R@ I J LEAVE and the later UNLOOP 2>R 2R> 2R@. Every other word,
in-line ones too, is a call the hook at `call` sees.
- EXECUTE calls the xt: `call xt` (opcode 3, slot 0) and a ; in (EXEC),
run. INTERPRET runs a word by (GO): `call xt` and `jump (IL)` in
(RUNX), entered by a jump, at the old return-stack depth.
- host_map.h: (EXEC) BUF0_W-22, (RUNX) BUF0_W-115, from what was free.
- Its cost, accepted: one return entry at the bottom of a chain (30 deep
from the prompt, not 31) and one per explicit EXECUTE while its word
runs; the hosted boot +2.4% (2.917 s to 2.987 s), instructions +0.4%.
- Tests first (logs/20261113-045122/a2): inline_words_are_called,
residue_stays_inline, execute_passes_the_hook, rstack_kept_across_call,
abandoned_definition_not_called -- 3 of 1096 failed before. The depth
checks moved to the new figures; SEE shows the calls; two layout checks
use in-line test words; 2>R 2R@ 2R> checked in test_host_quit.
- DECOMPOSITION.md EXECUTE, the plan's A2 and rulings, FABRIC-3 XLVIII.22.
Suite: test, test-32 99 programs 0 failures; v4-checks 79 under the
sanitizers 0 failures, the hosted builds alike; hosted POST 539/539.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017RzZgrf7V7Zk2iczBXDRbm
The host node starts in its ROM (entry 12), and the boot feeds it the
system's source through the console: capsules/v4/sys/map-64.f18, the
fourteen .f18 blobs and end.f18, each found, hash-checked and
signature-checked as any capsule, then EOT. The ROM assembles the system
and starts it at (IDLE); the host reads the image record
(v4_image_from_node) for what only the assembled system knows. A ROM
error is reported with its blob, line and meaning, then PARITY:FAIL.
Deleted: v4/tools/mkimage.c, capsules/v4/nucleus-64.f18, v4/capsule/*.v4,
v4/tools/v4tof18.py. The .f18 files are the source now.
- text.c speaks the rest of the ROM's language (set, here, store, start;
v4_text_value, v4_text_start), so the oracle reads the same source:
test_host_rom_nucleus compares the ROM against text.c on the .f18 files,
word for word, image record included. Host tests load the .f18 files.
- mkmap image writes v4_map_image (the map's description of the system);
hosted and the kernel link the ROM and the map instead of v4_image_64.c.
- Hera (Captain Bob's ruling, option 1): births stream the system the ROM
assembled, as assembled code; hera.4th is unchanged.
test_host_unit's host builds the system with the ROM.
- New parity lines: PARITY:V4_F18 per blob, PARITY:V4_ROM words=2049
rom_hash=0xa6c792b5821010b7 instructions=60725216.
Acceptance: amd64, aarch64, riscv64 boot to ok> with PARITY:V4_POST
tests=538 pass=538 fail=0, POST: PASSED, and PARITY:V4_SYSTEM
word_count=317 dict_hash=0xe5a57f3eb72ff94a on all three -- the same hash
as the prebuilt nucleus gave. make -C v4 test test-32 hosted-check: all
pass. Logs: logs/20261015-141648, -141938, -142350.
Startup cost under QEMU TCG, the ROM's assembly (last V4_F18 line to
V4_ROM): amd64 26.7 s of 132 s to ok>; aarch64 41.0 s of 195 s; riscv64
20.5 s of 101 s. Hosted native: +0.85 s.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
capsules/v4/sys: the nucleus's fourteen sources as .f18 blobs (made once by
v4/tools/v4tof18.py: header becomes the ROM's directives, every other token
and line kept), the memory map as map-<width>.f18 (mkmap sys, from one
table in host_map.h that host_load reads too), and end.f18, the switch-on
state mkimage.c set in C, the image record, and start (IDLE).
test_host_rom_nucleus.c: the ROM, fed those blobs through the console,
builds RAM identical word for word to mkimage.c's, outside its own state
and the image record, and starts at (IDLE), at both widths. The cost:
60.7 million instructions, 1.5 s on the C model.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude