diff --git a/src/planner/runner.cr b/src/planner/runner.cr
new file mode 100644
index 0000000..de395a5
--- /dev/null
+++ b/src/planner/runner.cr
@@ -0,0 +1,48 @@
+
+# Ref. https://platform.openai.com/docs/api-reference/chat
+
+## -x --expertise XXX 
+## -a --audience
+## -o --objectives
+
+# System
+
+# System (common)
+#   
+#   Characters
+#     TEACHER is ...
+#     AUDITOR is ...
+#
+#   Content Type
+#     ...
+#
+#   Audience
+#     ...
+#
+#   Topic
+#     ...
+
+# Message (1) : please define main TOC
+#
+#   Request
+#     Write TOC for a ...
+#
+#   Constraints
+#   ...
+# 
+# => JSON
+
+# Message (1) : please define chapter TOC
+# 
+#   TOC
+#     ...
+#   Request
+#     Write content structure for chapter ...
+#     ...
+# => JSON
+
+# Message (2) : please write 
+
+
+# [auto] Request
+# [auto]