faeval.git/experiments/checkpointed_handoff.py, branch master Unnamed repository; edit this file 'description' to name the repository. Add Phase 9A: checkpointed handoff — blend(Vec+DFA) outperforms pure DFA 2026-03-25T21:20:53+00:00 YurenHao0426 Blackhao0426@gmail.com 2026-03-25T21:20:53+00:00 5a3b20d627eca65612f598c1ba5807d5d2df029a First positive online result: 50% blend of offline-fitted Vec + DFA gives 31.7% vs 31.1% for pure DFA (+0.55%). This is Case B: pure Vec handoff fails (-1.1%) but blend works because DFA stabilizes trajectory while Vec adds directional credit. Offline-fitted Vec at DFA epoch-5 checkpoint: Gamma=0.229, rho=0.262. Cold-start confirmed as main bottleneck — Vec IS useful on DFA trajectory features. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> 
First positive online result: 50% blend of offline-fitted Vec + DFA gives 31.7%
vs 31.1% for pure DFA (+0.55%). This is Case B: pure Vec handoff fails (-1.1%)
but blend works because DFA stabilizes trajectory while Vec adds directional credit.

Offline-fitted Vec at DFA epoch-5 checkpoint: Gamma=0.229, rho=0.262.
Cold-start confirmed as main bottleneck — Vec IS useful on DFA trajectory features.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>