# keys
OBS_ENV = "observation.environment_state"
OBS_ROBOT = "observation.state"
OBS_IMAGE = "observation.image"
OBS_IMAGES = "observation.images"
ACTION = "action"

# files & directories
CHECKPOINTS_DIR = "checkpoints"
LAST_CHECKPOINT_LINK = "last"
PRETRAINED_MODEL_DIR = "pretrained_model"
TRAINING_STATE_DIR = "training_state"
RNG_STATE = "rng_state.safetensors"
TRAINING_STEP = "training_step.json"
OPTIMIZER_STATE = "optimizer_state.safetensors"
OPTIMIZER_PARAM_GROUPS = "optimizer_param_groups.json"
SCHEDULER_STATE = "scheduler_state.json"