research(nightly): matryoshka-hnsw — dimension-adaptive cascade vector search#467
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research(nightly): matryoshka-hnsw — dimension-adaptive cascade vector search#467ruvnet wants to merge 1 commit into
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Adds ADR-194 topic selection, SOTA research for Matryoshka Representation Learning (MRL, arXiv:2205.13147) and dimension-adaptive cascade search as the 2026-05-16 nightly RuVector research topic. Research loop passes: 3 (Discover → Deepen → Critique) Selected slug: matryoshka-hnsw Final score: 4.65 (highest of 8 evaluated candidates)
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Nightly RuVector research: Matryoshka HNSW
Adds the 2026-05-16 nightly research for dimension-adaptive multi-resolution vector search using Matryoshka cascade.
What is included
Working Rust PoC —
crates/ruvector-matryoshkaMatryoshkaIndextrait (3 implementations)FullScan(baseline),CoarseScan(fast/lossy),CascadeSearch(Matryoshka cascade)matryoshka-benchADR —
docs/adr/ADR-194-matryoshka-hnsw.mdResearch document —
docs/research/nightly/2026-05-16-matryoshka-hnsw/README.mdSEO gist —
docs/research/nightly/2026-05-16-matryoshka-hnsw/gist.mdReal benchmark results (x86-64 Linux, rustc 1.87+, N=5 000, D=128, K=10)
Acceptance: recall@10 = 1.0000 ≥ 0.90 → PASS ✓. 2.28× throughput gain over FullScan.
Quick start
cargo build --release -p ruvector-matryoshka cargo test -p ruvector-matryoshka cargo run --release -p ruvector-matryoshkaResearch doc:
docs/research/nightly/2026-05-16-matryoshka-hnsw/README.mdADR:
docs/adr/ADR-194-matryoshka-hnsw.mdThis branch should either become a production RuVector capability or a falsified research path with useful evidence.
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