Add schedule smoke test routine

src/activity_core/rules/executor.py

@@ -22,6 +22,7 @@ logger = logging.getLogger(__name__)
 
 # Matches {field.path} placeholders in prompt templates.
 _PLACEHOLDER_RE = re.compile(r"\{([a-zA-Z_][a-zA-Z0-9_.]*)\}")
+_FENCED_JSON_RE = re.compile(r"^```(?:json)?\s*(.*?)\s*```\s*$", re.DOTALL)
 
 
 class UntrustedFieldError(ValueError):
@@ -240,7 +241,7 @@ def _invalid_output_report(
     raw_preview: str | None = None
     if isinstance(raw_output, str):
         try:
-            partial_output = json.loads(raw_output)
+            partial_output = _parse_json_output(raw_output)
         except json.JSONDecodeError:
             partial_output = None
             raw_preview = raw_output[:4000]
@@ -282,7 +283,7 @@ def _validate_output(
     """
     try:
         if isinstance(raw_output, str):
-            data = json.loads(raw_output)
+            data = _parse_json_output(raw_output)
         else:
             data = raw_output
 
@@ -328,6 +329,29 @@ def _validate_output(
         return [], None, str(exc)
 
 
+def _parse_json_output(raw_output: str) -> Any:
+    """Parse JSON output, accepting a single Markdown JSON fence when present."""
+    text = raw_output.strip()
+    try:
+        return json.loads(text)
+    except json.JSONDecodeError as original_error:
+        fence_match = _FENCED_JSON_RE.match(text)
+        if fence_match:
+            return json.loads(fence_match.group(1).strip())
+
+        decoder = json.JSONDecoder()
+        for marker in ("{", "["):
+            start = text.find(marker)
+            if start < 0:
+                continue
+            try:
+                data, _ = decoder.raw_decode(text[start:])
+            except json.JSONDecodeError:
+                continue
+            return data
+        raise original_error
+
+
 def _validate_against_schema(data: Any, schema_path: str) -> str | None:
     if not schema_path:
         return None