MarinFold exp166 checkpoints

Final checkpoints from the MarinFold contacts-v1 1.5B amino-acid augmentation experiment tracked in Open-Athena/MarinFold#166. Loss is eval/tokenized/contacts-v1-val/loss.

Both checkpoint formats are retained:

hf/ contains a Qwen3ForCausalLM Hugging Face safetensors export with the contacts-v1 tokenizer colocated with the weights.
checkpoints/ contains the original Levanter OCDBT checkpoint for training restart or re-export.

Checkpoint inventory

Epochs	Initialization	Selection	W&B run	Loss	Step	Repository paths	Full GCS sources
8	exp117 checkpoint	Final	`prot-exp166-cv1-aaaug-1_5b-e8-lr3p162e-3-wd0p1-bs128-exp117-init-us-east1`	2.664179	35,679	Levanter: `checkpoints/step-35679` HF: `hf/step-35679`	Levanter: `gs://marin-us-east1/prot-exp166-cv1-aaaug-1_5b-e8-lr3p162e-3-wd0p1-bs128-exp117-init-us-east1/2026.07.27.1/checkpoints/step-35679/` HF: `gs://marin-us-east1/prot-exp166-cv1-aaaug-1_5b-e8-lr3p162e-3-wd0p1-bs128-exp117-init-us-east1/2026.07.27.1/hf/step-35679/`

The training target was 35,680 steps; Levanter's zero-indexed final checkpoint is step-35679. The dated GCS layout component is intentionally omitted from repository paths.

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