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2026-02-11A12-A14 init_logit ablation: confirm frozen OLMo cannot benefit from sparse ↵HEADmainYurenHao0426
topology - A12 (logit=3): NLL 2.76, A13 (logit=0): NLL 3.51, A14 (logit=1): NLL 3.26 - All worse than baseline (2.46). Lower init_logit = more deviation = worse NLL - Confirms: gradient flows (gates move), but A=1 is global optimum for frozen model - Added Dolma streaming retry logic (max 10 retries, 30s wait) - Phase 1 frozen approach has fundamental limitation; Phase 2 (unfreeze) needed Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-10Add auto-resume checkpointing, S1/S2 configs, and experiment resultsYurenHao0426
- Auto-resume: find latest checkpoint in save_dir on startup - SIGUSR1 handler: save checkpoint before SLURM timeout - S1 config (constant tau=5, identity init verification) - S2 config (constant tau=2, gradient flow check) - Experiment results tracker with S0/S1 data - Speed estimates and experiment plan Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>