skeleton.stan

functions {                 # User-defined functions                      [Optional]
}
data {                      # Data (external)                             [Optional]
}
transformed data {          # Preprocess data                             [Optional]
}

parameters {                # Model parameters (must precede model)       [Mandatory]
}
transformed parameters {    # Preprocess parameters                       [Optional]
}
model {                     # Model                                       [Mandatory]
}

generated quantities {      # Postprocess                                 [Optional]
}