Folding ABI as a relational substrate: DuckDB differential harness, tiled execution, joins and distinct counts as one-program folds - #1256

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AdaWorldAPI merged 15 commits into

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claude/fold-distillation-pr-wave-s57uj7

Sep 22, 2026

Commits on Sep 21, 2026

quack: DuckDB differential harness — 13 relational cases green, 3 JOIN cases red by design
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mask-risc + quack: JOIN as a fold — Gather / ScatterOr ops, one-terminal GROUP BY SUM
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663b879
mask-risc: fk-keyed GroupSumViaI32 terminal; Quack lowers join_group_sum_country to one program
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e3f155e
helix, perturbation-sim: resolve ndarray from the one sibling path, not git
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mask-risc: tiled execution — no population-sized state outside the demanded sink
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4fedb9a
quack: tiled scratch everywhere; a kept mask lands in the demanded Out::Mask
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mask-risc: ScatterCountU32 — the one-to-many hop folded to its distinct count
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quack: join predicate factored through the index lane — no partner mask, one program
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mask-risc + quack: COUNT DISTINCT folds in one program — clustered run fold, or the minimal seen-set
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quack harness: count the clustered view the test builds as its own materialisation
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d92d55e
mask-risc + quack: a key lane out of order is refused, never folded through a seen-set
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9967fab
mask-risc + quack: the distinct fold's precondition is ORDERED, not clustered
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4d27032

Commits on Sep 22, 2026