feat: template attempt metrics result compare hint

Author: FunMelon

openevolve/prompt/sampler.py

@@ -263,7 +263,7 @@ def _format_evolution_history(
 
             # Determine outcome based on comparison with parent (only numeric metrics)
             parent_metrics = program.get("metadata", {}).get("parent_metrics", {})
-            outcome = "Mixed results"
+            outcome = self.template_manager.get_fragment("attempt_mixed_metrics")
 
             # Safely compare only numeric metrics
             program_metrics = program.get("metrics", {})
@@ -290,9 +290,9 @@ def _format_evolution_history(
 
             # Determine outcome based on numeric comparisons
             if numeric_comparisons_improved and all(numeric_comparisons_improved):
-                outcome = "Improvement in all metrics"
+                outcome = self.template_manager.get_fragment("attempt_all_metrics_improved")
             elif numeric_comparisons_regressed and all(numeric_comparisons_regressed):
-                outcome = "Regression in all metrics"
+                outcome = self.template_manager.get_fragment("attempt_all_metrics_regressed")
 
             previous_attempts_str += (
                 previous_attempt_template.format(

openevolve/prompts/defaults/fragments.json

@@ -17,5 +17,8 @@
   "default_improvement": "Focus on improving the fitness score while exploring diverse solutions",
   "no_feature_coordinates": "No feature coordinates",
   "artifact_title": "Last Execution Output",
-  "diverse_programs_title": "Diverse Programs"
+  "diverse_programs_title": "Diverse Programs",
+  "attempt_all_metrics_improved": "Improvement in all metrics",
+  "attempt_all_metrics_regressed": "Regression in all metrics",
+  "attempt_mixed_metrics": "Mixed results"
 }