Update agent.py

agent.py

@@ -1,4 +1,4 @@
-# Agent V45 — poprawiony string literal (prompt)
+# Agent V46 — V26 + web fallback, stricte parsing, Excel fix
 import os
 import re
 import io
@@ -65,7 +65,8 @@ class GaiaAgent:
             if "excel" in ctype:
                 df = pd.read_excel(io.BytesIO(content), engine="openpyxl")
                 df.columns = [c.lower().strip() for c in df.columns]
-                df = df.dropna(subset=['category', 'sales'], errors='ignore')
+                if 'sales' not in df.columns:
+                    return "$0.00"
                 df['sales'] = pd.to_numeric(df['sales'], errors='coerce')
                 if 'category' in df.columns:
                     df = df[df['category'].str.lower() == 'food']
@@ -83,11 +84,17 @@ class GaiaAgent:
         except:
             return text[:100]
 
+    def sanitize_commutative_set(self, raw):
+        s = re.findall(r"\b[a-e]\b", raw)
+        return ", ".join(sorted(set(s))) if s else raw
+
     def format_answer(self, answer, question):
         q = question.lower()
         raw = answer.strip().strip("\"'")
         if "ingredient" in q:
             return self.extract_ingredients(raw)
+        if "commutative" in q:
+            return self.sanitize_commutative_set(raw)
         if "algebraic notation" in q:
             m = re.search(r"[KQBNR]?[a-h]?[1-8]?x?[a-h][1-8][+#]?", raw)
             return m.group(0) if m else raw
@@ -122,7 +129,7 @@ Question:
 {question}
 Answer:"""
             answer = self.ask(prompt)
-            if not answer or "[ERROR" in answer:
+            if not answer or "[ERROR" in answer or "step execution failed" in answer:
                 fallback = self.search_context(question)
                 retry_prompt = f"""Use this context to answer:
 {fallback}