add date range validation for transaction creation

main.py

@@ -7,6 +7,7 @@ from pathlib import Path
 from typing import Any
 
 import ynab
+from dateutil.relativedelta import relativedelta
 
 from category_suggester import CategoryHistory
 from wf_credit_extractor import WellsFargoPayloadExtractor as CreditExtractor
@@ -601,6 +602,27 @@ def _execute_import(
     # --- Create new + duplicates ---
     to_create = classification.new + classification.duplicates
     if to_create:
+        today = date.today()
+        earliest_ynab_date = today - relativedelta(years=5)
+        eligible_to_create = []
+        skipped_for_date = []
+        for transaction in to_create:
+            transaction_date = date.fromisoformat(transaction["date"])
+            if earliest_ynab_date <= transaction_date <= today:
+                eligible_to_create.append(transaction)
+            else:
+                skipped_for_date.append(transaction)
+
+        if skipped_for_date:
+            print(
+                f"  [ynab] Skipped {len(skipped_for_date)} transaction(s) outside "
+                f"the supported date range ({earliest_ynab_date} through {today}):"
+            )
+            for transaction in skipped_for_date:
+                payee = transaction.get("payee_name") or "(no payee)"
+                print(f"    {transaction['date']} | {payee}")
+
+        if eligible_to_create:
             new_txns = [
                 ynab.NewTransaction(
                     account_id=t["account_id"],
@@ -613,7 +635,7 @@ def _execute_import(
                     import_id=t["import_id"],
                     approved=t.get("approved", False),
                 )
-            for t in to_create
+                for t in eligible_to_create
             ]
             resp = ynab_client.create_transactions(new_txns)
             created_ids = resp.transaction_ids or []