ForthOS — Metacompiler phase tracker

All six metacompiler phases complete. 151/151 tests passing. Self-hosting proven in Phase B6. Standalone bootable kernel produced in Phase B6b.

Total tests
151
Phases complete
6 / 6
Kernel size
66 KB
Host words
85
Phase A — Core infrastructure
26 testscompletea632de6
85 words, 387 lines. Target memory (T-C@, T-@, T-!, T-ALLOT), compilation state, forward refs (FORWARD / RESOLVE / META-CHECK), defining words, control flow (T-IF / T-THEN / T-ELSE, T-BEGIN / T-UNTIL, T-DO / T-LOOP), context switching (IN-META / IN-TARGET). Foundation for all subsequent phases.
Phase B3 — Binary copy proof
64 spot-checkscomplete
T-BINARY, copies the 64 KB kernel byte-for-byte. 64 spot-checks confirm bit-perfect reproduction. Establishes that the metacompiler can faithfully represent the existing kernel image before adding generative capability.
Phase B4 — Boot proof
20 testscomplete
Metacompiled kernel boots in a fresh QEMU instance. 3 4 + . produces 7. Proves the output image is a real bootable kernel, not just a byte copy. 20/20 tests passing.
Phase B5 — CODE word calls
37 testscomplete
Adds CALL-ABS, enabling metacompiled CODE words to call back into kernel helper routines. 103 symbols resolved, 37/37 tests. This is the bridge that lets hand-written assembly words coexist with metacompiled Forth in the same image.
Phase B6 — INTERPRET metacompiled
15 testscompleteself-hosting proven
Full INTERPRET word metacompiled with control flow, colon definitions, and error handling. 133 symbols, 4,076 bytes. 15/15 tests. Self-hosting proven — the metacompiler can produce a kernel that can interpret new Forth source in real time.
Phase B6b — Standalone bootable kernel
17 testscompleteregression clean
Produces a 66,048-byte standalone bootable metacompiled kernel. 17/17 tests. Full regression green across all 151 tests. This is the output artifact — a kernel PXE-bootable onto real hardware, generated entirely by the metacompiler. Next: multi-architecture target expansion (ARM64, RISC-V).