All four run exactly as written in DECOMPOSITION.md 5.6/5.7 and need no change now that D+ and DNEGATE are call-free. Checked against C at 32- and 64-bit cells, optimised and ASan+UBSan: every edge-vector combination (M+ over all triples, D- and D= over all 50625 quadruples, D0= over all pairs) plus 20000 pseudo-random cases weighted to equal low or high cells and low sums that wrap to 0. Mutations of D0= and M+ are caught. Headroom (data cells under args / return entries under return address): M+ 6/4, D- 5/4, D0= 7/7, D= 5/3. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
v4/
StarForth v4: the 32-instruction F18-derived core. The design lives in
docs/v4.0.0/JUSTIFICATION.md (why) and docs/v4.0.0/DECOMPOSITION.md
(every v3 word mapped to a v4 fate).
The first deliverable is the hosted C99 golden model (JUSTIFICATION.md §10,
step 1). It must pass POST and hold K≡1.0 with 32- and 64-bit cells on all
three host ISAs.
What exists so far is the single node: registers, circular stacks, memory, all
32 opcodes, and per-opcode and per-call-target heat. make -C v4 test builds
and runs the tests at both cell widths; make -C v4 sanitize repeats them
under ASan and UBSan. There is no compiler capsule, no POST and no K
measurement yet.