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rose-ash/lib
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datalog: db + naive eval + safety analysis (Phase 3, 87/87)
db.sx: facts indexed by relation name, rules list, dl-add-fact!
(rejects non-ground), dl-add-rule! (rejects unsafe — head vars
not in positive body). eval.sx: dl-saturate! fixpoint, dl-query
with deduped projected results. Negation and arithmetic raise
clear errors (Phase 4/7 to follow). 15 eval tests: transitive
closure, sibling, same-gen, grandparent, cyclic reach, safety.
2026-05-07 23:41:27 +00:00
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