AI Implementation feature(906): Challenges Page and Challenge Solve Modal 1.02 (#48)

docs/index.md

@@ -11,7 +11,7 @@ scoreboard, an event window with a public countdown, theming, and admin
 controls.
 
 The docs below are organized by purpose so agents can pull just the slice
-they need. Last regenerated 2026-07-23T00:10:00Z.
+they need. Last regenerated 2026-07-23T02:23:34Z.
 
 # Architecture
 
@@ -35,6 +35,10 @@ they need. Last regenerated 2026-07-23T00:10:00Z.
   Forward-only migration that adds `created_at`/`updated_at` to legacy
   `category` tables and reconciles system rows to the canonical
   CRY/HW/MSC/PWN/REV/WEB set.
+* [Seed Sample Challenges Migration](/database/seed-sample-challenges-migration.md) -
+  Forward-only migration that inserts a representative sample set of
+  challenges on a fresh database so the `/challenges` board has cards
+  immediately, with idempotency guards and scoped `down()`.
 * [Auth and Settings Tables](/database/auth-settings.md) - `refresh_token`
   and `setting` tables.
 * [Blog Post Table](/database/blog-posts.md) - `blog_post` table.