diff --git a/src/core/prompt-sections.ts b/src/core/prompt-sections.ts
new file mode 100644
index 0000000..b300300
--- /dev/null
+++ b/src/core/prompt-sections.ts
@@ -0,0 +1,6 @@
+export type SectionKind = "head" | "context" | "prompt" | "guide" | "warn";
+
+export interface PromptSection {
+  kind: SectionKind;
+  content: string;
+}