diff --git a/.github/agents/template.agent.md b/.github/agents/template.agent.md
new file mode 100644
index 000000000..9b5ef1fdc
--- /dev/null
+++ b/.github/agents/template.agent.md
@@ -0,0 +1,6 @@
+---
+description: 'Tidy templates'
+tools: ["read", "edit", "search"]
+---
+Validate templates files inside templates/definition/** against default parameters in util/tempaltes/defaults.yaml.
+Make sure that templates don't repeat parts of the default parameter definition.