Concept

Matched-Budget Best-First Traversal Comparator in Strict-Parity Prerequisite Retrieval

The matched-budget best-first traversal comparator is a graph-aware strict-parity baseline in which the prerequisite graph is traversed by expanding the highest-scoring frontier node first, subject to the same node/edge/token budget as the paper's diffusion retriever. Under the strict-parity contract, it shares the same encoder, m/km/k budgets, split, and exact-ID matching rule as every other compared system, so any difference between this comparator and the paper's diffusion policy is attributable to the graph policy itself (best-first traversal versus dense-seeded local diffusion with role-aware quotas) rather than to budget or interface differences.

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Updated 2026-05-17

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Auditable Strict-Parity Evaluation of Prerequisite-Graph Retrieval for RAG under Leakage Controls