diff --git a/scripts/train.py b/scripts/train.py
index a652f3b..18393a5 100644
--- a/scripts/train.py
+++ b/scripts/train.py
@@ -6,6 +6,17 @@
 
 import rl4caribou
 
+# training
+#
+from rl4caribou.utils import sb3_train    
+model_save_id, train_options = sb3_train(args.file)
 
-from rl4eco.utils import sb3_train    
-sb3_train(args.file)
+# hugging face
+#
+if 'repo' in train_options:
+    from rl4caribou.utils import upload_to_hf
+    try:
+        upload_to_hf(args.file, "sb3/"+args.file, repo=train_options['repo'])
+        upload_to_hf(model_save_id, "sb3/"+model_save_id+".zip", repo=train_options['repo'])
+    except:
+        print("Couldn't upload to hf!")
\ No newline at end of file
diff --git a/src/rl4caribou/agents/__init__.py b/src/rl4caribou/agents/__init__.py
new file mode 100644
index 0000000..d4b412a
--- /dev/null
+++ b/src/rl4caribou/agents/__init__.py
@@ -0,0 +1,2 @@
+from rl4caribou.agents.const_escapement import constEsc
+from rl4caribou.agents.const_action import constAction
\ No newline at end of file
diff --git a/src/rl4caribou/agents/const_action.py b/src/rl4caribou/agents/const_action.py
new file mode 100644
index 0000000..464af2f
--- /dev/null
+++ b/src/rl4caribou/agents/const_action.py
@@ -0,0 +1,15 @@
+import numpy as np
+
+class constAction:
+    def __init__(self, mortality_vec=np.zeros(2, dtype=np.float32), env = None, **kwargs):
+        #
+        # preprocess
+        if isinstance(mortality_vec, list):
+            mortality_vec = np.float32(mortality_vec)
+        #
+        self.mortality_vec = mortality_vec
+        self.action = 2 * self.mortality_vec - 1
+        self.env = env
+
+    def predict(self, observation, **kwargs):
+        return self.action, {}
\ No newline at end of file
diff --git a/src/rl4caribou/agents/const_escapement.py b/src/rl4caribou/agents/const_escapement.py
new file mode 100644
index 0000000..5d05be1
--- /dev/null
+++ b/src/rl4caribou/agents/const_escapement.py
@@ -0,0 +1,45 @@
+import numpy as np
+
+class constEsc:
+    def __init__(self, escapement_vec, env = None):
+        #
+        # preprocess
+        if isinstance(escapement_vec, list):
+            escapement_vec = np.float32(escapement_vec)
+        escapement_vec = np.clip(
+            escapement_vec, a_min = 0, a_max = None
+        )
+        #
+        self.escapement_vec = escapement_vec
+        self.env = env
+        self.bound = 1
+        if self.env is not None:
+            self.bound = self.env.bound
+
+    def predict(self, observation, **kwargs):
+        obs_nat_units = self.bound * self.to_01(observation)
+        m_mort = self.moose_mortality(obs_nat_units[0])
+        w_mort = self.wolf_mortality(obs_nat_units[2])
+        mortality = np.float32([m_mort, w_mort])
+        return self.to_pm1(mortality), {}
+
+    def moose_mortality(self, moose_pop):
+        if moose_pop <= self.escapement_vec[0]:
+            return 0
+        else:
+            return (moose_pop - self.escapement_vec[0]) / moose_pop
+    
+    def wolf_mortality(self, wolf_pop):
+        if wolf_pop <= self.escapement_vec[1]:
+            return 0
+        else:
+            return (wolf_pop - self.escapement_vec[1]) / wolf_pop
+    
+    def to_01(self, val):
+        return (val + 1 ) / 2
+
+    def to_pm1(self, val):
+        return 2 * val - 1
+
+
+        
diff --git a/src/rl4caribou/envs/__init__.py b/src/rl4caribou/envs/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/rl4caribou/utils/__init__.py b/src/rl4caribou/utils/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/rl4caribou/utils/hugging_face.py b/src/rl4caribou/utils/hugging_face.py
new file mode 100644
index 0000000..88665c1
--- /dev/null
+++ b/src/rl4caribou/utils/hugging_face.py
@@ -0,0 +1,17 @@
+from huggingface_sb3 import load_from_hub, package_to_hub
+from huggingface_hub import HfApi
+
+from os.path import basename
+import pathlib
+
+def upload_to_hf(path, path_in_repo, repo, clean=False):
+    api = HfApi()
+    if path_in_repo is None:
+        path_in_repo = basename(path)
+    api.upload_file(
+        path_or_fileobj=path,
+        path_in_repo=path_in_repo,
+        repo_id=repo,
+        repo_type="model")
+    if clean:
+        pathlib.Path(path).unlink()
\ No newline at end of file
diff --git a/src/rl4caribou/utils/sb3.py b/src/rl4caribou/utils/sb3.py
new file mode 100644
index 0000000..12a572a
--- /dev/null
+++ b/src/rl4caribou/utils/sb3.py
@@ -0,0 +1,71 @@
+import yaml
+import os
+
+import gymnasium as gym
+from stable_baselines3.common.env_util import make_vec_env
+from stable_baselines3 import PPO, A2C, DQN, SAC, TD3, HER, DDPG
+from sb3_contrib import TQC, ARS, RecurrentPPO
+
+def algorithm(algo):
+    algos = {
+        'PPO': PPO, 
+        'ppo': PPO,
+        'RecurrentPPO': RecurrentPPO,
+        'RPPO': RecurrentPPO,
+        'recurrentppo': RecurrentPPO,
+        'rppo': RecurrentPPO,
+        #
+        'ARS': ARS,
+        'ars': ARS,
+        'A2C': A2C, 
+        'a2c':A2C ,
+        #
+        'DDPG': DDPG, 
+        'ddpg': DDPG,
+        #
+        'HER': HER, 
+        'her': HER,
+        #
+        'SAC': SAC, 
+        'sac': SAC,
+        #
+        'TD3': TD3, 
+        'td3': TD3,
+        #
+        'TQC': TQC, 
+        'tqc': TQC,
+    }
+    return algos[algo]
+
+def sb3_train(config_file, **kwargs):
+    with open(config_file, "r") as stream:
+        options = yaml.safe_load(stream)
+        options = {**options, **kwargs}
+        # updates / expands on yaml options with optional user-provided input
+
+    if "n_envs" in options:
+        env = make_vec_env(
+            options["env_id"], options["n_envs"], env_kwargs={"config": options["config"]}
+        )
+    else:
+        env = gym.make(options["env_id"])
+    ALGO = algorithm(options["algo"])
+    model_id = options["algo"] + "-" + options["env_id"]  + "-" + options["id"]
+    save_id = os.path.join(options["save_path"], model_id)
+
+    model = ALGO(
+        "MlpPolicy",
+        env,
+        verbose=0,
+        tensorboard_log=options["tensorboard"],
+        use_sde=options["use_sde"],
+    )
+
+    progress_bar = options.get("progress_bar", False)
+    model.learn(total_timesteps=options["total_timesteps"], tb_log_name=model_id, progress_bar=progress_bar)
+
+    os.makedirs(options["save_path"], exist_ok=True)
+    model.save(save_id)
+    print(f"Saved {options['algo']} model at {save_id}")
+    
+    return save_id, options
\ No newline at end of file
diff --git a/tests/test_caribou.py b/tests/test_caribou.py
index 1c1a66b..6deb5da 100644
--- a/tests/test_caribou.py
+++ b/tests/test_caribou.py
@@ -1,7 +1,23 @@
 # Confirm environment is correctly defined:
 from stable_baselines3.common.env_checker import check_env
+import numpy as np
 from rl4caribou import Caribou
+from rl4caribou.agents import constAction, constEsc
 
 def test_Caribou():
     check_env(Caribou(), warn=True)
 
+def test_constAction():
+    ca1 = constAction(mortality_vec = [0,0])
+    ca2 = constAction(mortality_vec = np.zeros(2))
+    obs = np.zeros(3)
+    pr1, _ = ca1.predict(obs)
+    pr2, _ = ca2.predict(obs)
+
+def test_constEsc():
+    ce1 = constEsc(escapement_vec = [0,0])
+    ce2 = constEsc(escapement_vec = np.zeros(2))
+    obs = np.zeros(3)
+    pr1, _ = ce1.predict(obs)
+    pr2, _ = ce2.predict(obs)
+