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dl-magic-rewrite rules query-rel adn args returns:
{:rules <rewritten-rules> :seed <magic-seed-fact>}
Worklist over (rel, adn) pairs starts from the query and stops
when no new pairs appear. For each rule with head matching a
worklist pair:
- Adorned rule: head :- magic_<rel>^<adn>(bound), body...
- Propagation rules: for each positive non-builtin body lit
at position i:
magic_<lit-rel>^<lit-adn>(bound-of-lit) :-
magic_<rel>^<adn>(bound-of-head),
body[0..i-1]
- Add (lit-rel, lit-adn) to the worklist.
Built-ins, negation, and aggregates pass through without
generating propagation rules. EDB facts are unchanged.
3 new tests cover seed structure, equivalence on chain-3 (full
closure, 6 ancestor tuples — magic helps only when the EDB has
nodes outside the seed's transitive cone), and same-query-answers
under the rewritten program. Total 202/202.
Wiring up a `dl-saturate-magic!` driver and large-graph perf
benchmarks is left for a future iteration.