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Age	Commit message (Collapse)	Author
2026-03-25	Add Phase 9A: checkpointed handoff — blend(Vec+DFA) outperforms pure DFA	YurenHao0426
	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>