# beam_cvar

## Summary
- **Best FA**: +0.330
- **Oracle calls**: 4,358
- **Wall time**: 4 hours
- **Epochs**: 191

## Algorithm: Beam Search Active Loop
1. Beam search of width=8, guided by ensemble mean μ (deterministic scoring)
2. Beam produces K=25 candidates per epoch directly (no separate Thompson selection)
3. Evaluate K with FA oracle, CVaR fine-tune DDPP, retrain ensemble

Key difference from thompson_cvar: search is directed by μ deterministically.
No per-candidate exploration — always prunes toward ensemble mean.

## Config
- selection: beam, K=25, beam_width=8
- tau_mode=cvar, tau_quantile=0.80, ddpp_steps_per_epoch=50
- wall_budget_sec=14400 (4hr)

## Files
- active_loop_log.jsonl, oracle_progress.csv, results.json