Enable graders on all tasks and add validator-compatible grade aliases

graders.py

@@ -195,3 +195,10 @@ def grade_action(
         "score": round(score, 4),
     }
     return score, details
+
+
+def grade(
+    action: List[Dict[str, Any]], expected: List[Dict[str, Any]]
+) -> Tuple[float, Dict[str, Any]]:
+    """Compatibility alias for validators expecting graders:grade."""
+    return grade_action(action, expected)

openenv.yaml

@@ -4,20 +4,32 @@ description: OpenEnv RL environment for Solidity security review
 entrypoint: environment.py:SolidityGuardEnv
 tasks:
   - id: task_1_best_practices
+    name: Best Practices Audit
     difficulty: easy
+    enabled: true
     description: Detect syntax and best-practice issues in Solidity contracts.
     max_steps: 1
-    grader: graders:Grader.grade
+    grader: "graders:grade_action"
+    graders:
+      - "graders:grade_action"
   - id: task_2_gas_optimization
+    name: Gas Optimization Audit
     difficulty: medium
+    enabled: true
     description: Detect gas optimization opportunities in Solidity contracts.
     max_steps: 1
-    grader: graders:Grader.grade
+    grader: "graders:grade_action"
+    graders:
+      - "graders:grade_action"
   - id: task_3_security
+    name: Security Vulnerability Audit
     difficulty: hard
+    enabled: true
     description: Detect security vulnerabilities in Solidity contracts.
     max_steps: 1
-    grader: graders:Grader.grade
+    grader: "graders:grade_action"
+    graders:
+      - "graders:grade_action"
 schemas:
   observation:
     type: object