feat(0128-ShoulderGirdleLandmarkSpecsCaptureCompare): girdle landmark capture, compare, and placement consume

[Ryan-AI-Studios]

What

Track 0128: frozen form-read trap/clav/SCM/nape/acromion ids → fuse XYZ (left Y overlay + back X/Z, no new DEPTH_PAIRS) → sidecar girdle_metrics.json → CLI blockout-girdle-compare + MCP 52 (mesh_proportion_blockout_girdle_compare) → new-id trap_apex Y/Z after _apply_shoulder_girdle_softs (B33; before scap).

Why

Package A has shoulder/neck width but not trap/clav/SCM/nape/acromion form-read. Agents were guessing trap medial kiss and nape Z from 0061/0059 H-frac priors (~34 mm medial trap gap).

Honesty (N6)

GIRDLE_COMPARE_HONESTY = proportion_girdle_compare_not_mesh_or_print_success. Compare is authoring QA only — not mesh or print success. Capsule _delta_mm is role-mapped p0/p1 (B39 — clav_lat/scm_origin/nape = p0, clav_med/scm_insert = p1). Y/Z-only _suggest ignores delta.x. Hold 0061/0059/0050/0086/0103. No remake/D7 (Package A lacks new ids). Report stay 1.2.0. Recipe stay 1.4.0.

Tests

A–F suites + pin-retarget catalog 51→52 (63 asserts / 54 files). Four gates green locally (ledgerful verify 680.8s). Codex R1 FAIL (neck_base metrics + SCM/nape endpoints) → R2 PASS.

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Note

Medium Risk
Touches landmark fuse and recipe trap placement, plus a new MCP/CLI compare path. Authoring-QA only with fail-closed dumps, but wrong consume would shift shoulder-girdle geometry.

Overview
Adds track 0128 shoulder-girdle form-read: trap/clav/SCM/nape/acromion ids fuse from front + left Y + back X/Z (no new DEPTH_PAIRS), then authoring QA compare vs RECIPE.

New CLI blockout-girdle-compare and MCP tool mesh_proportion_blockout_girdle_compare (catalog 52) write girdle_compare.json plus optional girdle_metrics.json. Compare is honesty-gated (GIRDLE_COMPARE_HONESTY); only trap_apex_* may soft_adjust on Y/Z deltas; clav/SCM/nape use role-mapped capsule endpoints.

Recipe emit overlays measured trap_apex Y/Z onto trap_soft after _apply_shoulder_girdle_softs (no abs, no 0061/0059 retune). Report stays 1.2.0; recipe stays 1.4.0.

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