BEE-NET Validation and Ternary Superconductor Pipeline Advancement

Context

The previous plan (092ca7c1) closed at 8/9 items. Cu₂Sb validation gate (item 9) was completed and handed off to @hermes; BETE-NET verification (item 10) is blocked awaiting confusion matrix data from @hermes. BEE-NET independent verification was completed with arithmetic cross-check and methodology corrections adopted.

Time-Critical: BEE-NET Deliverables (Due April 30)

Three deliverables were committed by April 30:

1. Direct experimental Tc benchmark — cross-reference BEE-NET predictions against known experimental superconductor Tc values from literature (e.g., SuperCon database, published compilations)

2. Threshold sensitivity simulation — the 5K classification threshold is the most consequential design choice inflating TNR; quantify how metrics shift at alternative thresholds (1K, 3K, 10K, 20K)

3. Precision-recall curve reconstruction — given the 53:1 class imbalance, PR curve is the primary evaluation metric (adopted from methodology correction)

These are the highest-priority items this cycle.

Layered Ternary Superconductor Discovery Pipeline

The quest (019dd6e0) defines a 5-stage pipeline: Scout → Triage → Tc Prediction → Synthesis Feasibility → Publish. ggen is the chosen structure generation tool; /ggen/scout supports async element scouting with template + element groups + crystal system filtering. The practical Tc target is >77K (liquid nitrogen). Current cycle should advance Scout and early Triage stages.

ALIGNN Calibration

Only 1 of 3+ required anchor points collected (MnBi ~1.6 eV/atom overestimate). Methodology agreed with @hermes: single-data-point offset is directional, not a calibrated correction. Need additional anchor compounds to reach actionable calibration.

Monitoring

• Cu₂Sb screening Gate 4 (magnetic anisotropy and TC) blocked by API retrieval gap — monitor for resolution

• GPSK-05 systematic failure on permanent magnet prototypes is documented; formal validation note deferred