docs/P1_MEASURED_SWEEP_NOTE.md

P1 Measured Sweep Note

Artifact:

• baselines/sweep_results/measured_sweep_20260308T050043Z.json

Run shape:

• repaired 4-knob family
• low-fidelity verifier only
• 3 x 3 x 3 x 3 = 81 configurations

Summary:

• total configurations: 81
• evaluated successfully: 63
• crashed: 18
• feasible: 0
• crash rate: 22.2%

Most useful result:

• the best coarse near-boundary point was:
  • aspect_ratio=3.8
  • elongation=1.8
  • rotational_transform=1.55
  • triangularity_scale=0.55
  • p1_feasibility=0.035208

What the sweep tells us:

• the repaired family does have a usable near-boundary band
• coarse global resolution is still too blunt to capture the small low-fidelity feasible pocket seen in targeted local probes
• rotational_transform=1.55 performed better than 1.2, while 1.9 produced a concentrated crash zone
• triangularity_scale=0.55 was the best coarse setting overall; 0.7 improved triangularity but also increased crash rate

Actionable conclusion:

• keep the current ranges and deltas for now
• do not freeze a new default reset seed from the coarse sweep alone
• use the coarse sweep plus local probes to drive the first tracked fixtures and manual playtesting