---
project: modelmap
document: candidate_03 — Localization index (Q1 instrument)
author: Simon-Pierre Boucher
contact: contact@spboucher.ai
website: https://modelmap.io
created: 2026-08-12
status: draft
---

# candidate_03 — Localization index (Q1 instrument)

Assigned by Phase 4 (`research/candidate_ranking.md`). Core gaps: G17 (+G11/G12 as measurement layers).

**First falsifier:** the index must read ≈1 on Tracr-compiled circuits and ≈0 on random-init models; otherwise it is broken before touching real models.

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).