candidate_01 — Weight-only pre-screen

Assigned by Phase 4 (research/candidate_ranking.md). Core gaps: G06 (+G08 anchor, G03/G09 extensions).

First falsifier: super-weight causal catalog on 2 models; then Pythia-410M weight-features-vs-probe-maps regression, kill at cross-validated R² < 0.2.

Status: assigned — prototyping starts after the mandatory substrate (expH capture-cost frontier, expA/expD noise floors, map-cards v0). Hypothesis will be registered in hypothesis.md before any run (charter §10).