GridWorld Run Artifacts (Umbrella) #
Stable import for small GridWorld JSON artifacts used by TorchLean RL workflows and widgets. The implementation is split into:
Position: shared(row, col)JSON helpers;Policy: before/after greedy policy snapshots;Path: before/after rollout trajectory snapshots.
Primitive Nat/String array codecs come from Runtime.Training.JsonCodec, so training logs and RL
artifacts share one JSON vocabulary.