Extract public Encodon embeddings

Purpose

Extract one frozen CLS vector per coding sequence with public Encodon v1. Support input validation, command preparation, extraction, and checkpoint selection for translation efficiency, expression, or mRNA stability modeling. Extraction does not automatically train a downstream regressor.

Prerequisites

• Validation needs Python 3 standard library only; no GPU, weights, or API key.
• Execution needs the public CodonFM checkout, its requirements.txt environment, a compatible NVIDIA GPU, and local checkpoint weights. A metadata JSON is not a checkpoint. A .safetensors file needs its sibling config.json; .ckpt checkpoints are also supported by the public loader.
• Run python -m src.runner from the CodonFM repository root. In an isolated workspace, use supplied source artifacts; source paths below are relative to that checkout or source archive, not this skill directory.