Fix stagnation penalty floor to 0.01, never 0.0

sql_env/env.py

@@ -74,7 +74,7 @@ class SQLCorrectionEnv:
         if abs(reward - self._last_reward) < 0.01 and self._step_count > 1:
             self._stagnation_count += 1
             if self._stagnation_count >= 2:
-                reward = max(0.0, reward - 0.1)
+                reward = max(0.01, reward - 0.1)
         else:
             self._stagnation_count = 0
 

sql_env/models.py

@@ -42,7 +42,7 @@ class SQLState(State):
 
 
 class SQLReward(BaseModel):
-    # Allow full [0.0, 1.0] range so perfect matches can return exactly 1.0
+    # Strictly between 0 and 1 as required by the OpenEnv spec
     value: float = Field(gt=0.0, lt=1.0)
     reason: str
 

sql_env/server.py

@@ -55,7 +55,7 @@ class SQLCorrectionEnvironment(Environment):
         if abs(reward - self._last_reward) < 0.01 and self._step_count > 1:
             self._stagnation_count += 1
             if self._stagnation_count >= 2:
-                reward = max(0.0, reward - 0.1)
+                reward = max(0.01, reward - 0.1)
         else:
             self._stagnation_count = 0