diff --git a/src/internal/form.ts b/src/internal/form.ts
index 33992fcf..f10772b0 100644
--- a/src/internal/form.ts
+++ b/src/internal/form.ts
@@ -41,6 +41,7 @@ export interface FormControlControllerOptions {
   setValue: (input: ShoelaceFormControl, value: unknown) => void;
 }
 
+/** A reactive controller to allow form controls to participate in form submission, validation, etc. */
 export class FormControlController implements ReactiveController {
   host: ShoelaceFormControl & ReactiveControllerHost;
   form?: HTMLFormElement | null;
diff --git a/src/internal/slot.ts b/src/internal/slot.ts
index 30d67e9f..93c461e9 100644
--- a/src/internal/slot.ts
+++ b/src/internal/slot.ts
@@ -1,5 +1,6 @@
 import type { ReactiveController, ReactiveControllerHost } from 'lit';
 
+/** A reactive controller that determines when slots exist. */
 export class HasSlotController implements ReactiveController {
   host: ReactiveControllerHost & Element;
   slotNames: string[] = [];