Begin work on context template

sia/context_template.py

@@ -0,0 +1,40 @@
+from typing import List, Dict
+import xml.etree.ElementTree as ET
+
+def generate_context(containers: List[Dict[str, any]]) -> str:
+    """Generate full context XML string.
+    
+    Args:
+        containers: List of container status dictionaries
+    
+    Returns:
+        Formatted context XML string
+    """
+    context_elem = ET.Element("context")
+    context_elem.append(format_containers_xml(containers))
+    ET.indent(context_elem, space="\t")
+    return ET.tostring(context_elem, encoding='unicode')
+
+def format_containers_xml(containers: List[Dict[str, any]]) -> ET.Element:
+    """Format container statuses as XML string.
+    
+    Args:
+        containers: List of dictionaries containing container information
+        
+    Returns:
+        ElementTree.Element representing the containers
+    """
+    containers_elem = ET.Element("containers")
+    
+    for container in containers:
+        container_elem = ET.SubElement(containers_elem, "container")
+        container_elem.set("name", container['name'])
+        container_elem.set("status", container['status'])
+        container_elem.set("started_at", container['started_at'])
+        container_elem.set("stdout", str(container['stdout_size']))
+        container_elem.set("stderr", str(container['stderr_size']))
+        if 'exit_code' in container.keys():
+            container_elem.set("exit_code", str(container['exit_code']))
+        if 'error' in container.keys():
+            container_elem.set("error", container['error'])
+    return containers_elem