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giles a774cd26c1 GUEST: step 5 — lib/guest/ast.sx canonical AST shapes (kit + tests)

Defines the 10 canonical node kinds called out in the brief — literal,
var, app, lambda, let, letrec, if, match-clause, module, import — plus
predicates, ast-kind dispatch, and per-field accessors. Each node is a
tagged keyword-headed list: (:literal V), (:var N), (:app FN ARGS), …

Also lib/guest/tests/ast.sx — 33 tests exercising every constructor +
predicate + accessor, runnable via (gast-tests-run!) which returns the
{:passed :failed :total} dict the shared conformance driver expects.

PARTIAL — pending real consumers. The brief calls Step 5 "Optional —
guests may keep their own AST" and forcing lua/prolog to switch their
internal AST shape risks regressing 775 passing tests for tooling that
nothing yet calls. Both internal ASTs are untouched; lua still 185/185,
prolog still 590/590. Datalog-on-sx (in flight, see plans/datalog-on-sx.md)
will be the natural first real consumer; lua/prolog converters can land
when a cross-language tool wants them.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-07 17:35:49 +00:00

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590 / 590 passing (0 failure(s)). Generated 2026-05-07T17:35:23+00:00.

Suite	Passed	Total	Status
parse	25	25	ok
unify	47	47	ok
clausedb	14	14	ok
solve	62	62	ok
operators	19	19	ok
dynamic	11	11	ok
findall	11	11	ok
term_inspect	14	14	ok
append	6	6	ok
reverse	6	6	ok
member	7	7	ok
nqueens	6	6	ok
family	10	10	ok
atoms	34	34	ok
query_api	16	16	ok
iso_predicates	29	29	ok
meta_predicates	25	25	ok
list_predicates	33	33	ok
meta_call	15	15	ok
set_predicates	15	15	ok
char_predicates	27	27	ok
io_predicates	24	24	ok
assert_rules	15	15	ok
string_agg	25	25	ok
advanced	21	21	ok
compiler	17	17	ok
cross_validate	17	17	ok
integration	20	20	ok
hs_bridge	19	19	ok

Run bash lib/prolog/conformance.sh to refresh. Override the binary with SX_SERVER=path/to/sx_server.exe bash ….

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