diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 4f0f23d..2401a18 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -12,6 +12,13 @@ All UI is DARK-ONLY. Remove/ignore any light mode patterns. Maintain a utilitari
 7. Honest UI: If data is missing, show placeholder monospace text (e.g. `--` or `/path/not/found`).
 8. Component Modularity: Always componentize reusable UI patterns. Never inline complex markup or styles. If a component doesn't exist, create it first, then use it. Keep everything modular and DRY (Don't Repeat Yourself).
 
+## App Content
+
+- Every app must have a one-sentence description that states what it does.
+- Add the description to the app content frontmatter when the app has a local entry in `src/content/apps/`.
+- Add the app folder name and description to `src/content/app-descriptions.ts` when the app comes from the external `badger/home` catalog.
+- Keep external catalog keys aligned with the folder names used under `badge/apps/`.
+
 ## Color Tokens (Dark Only)
 ```
 background: #010409
diff --git a/src/content/app-descriptions.ts b/src/content/app-descriptions.ts
new file mode 100644
index 0000000..f544093
--- /dev/null
+++ b/src/content/app-descriptions.ts
@@ -0,0 +1,20 @@
+export const appDescriptions: Record<string, string> = {
+  '30_minutes_to_alpha_centauri': 'Pilot your ship through space to deliver your cargo.',
+  bee_amazed: 'Navigate your bee through the maze.',
+  clock: 'Clock with multiple styles, time zones, and more.',
+  demos: 'Collection of graphics for your badge. Shapes, text, sprites, and more.',
+  extend_a_squirrel: 'Snake-style game with a squirrel.',
+  ghost_signal: 'Follow the wave pattern as accurately as you can.',
+  hydrate: 'Have you had enough water today? Track it with this app!',
+  input_test: 'Hardware testing for badge inputs.',
+  iss_tracker: "Track the International Space Station's location in this app.",
+  life: "Conway's classic 'Game of Life' now on your badge.",
+  mass_storage: 'Use your badge as a USB storage device.',
+  plucky_cluck: 'Guide your chicken through obstacles in this Flappy Bird-style game.',
+  rogue: 'Turn-based dungeon crawler for your badge.',
+  sense: 'Sensor dashboard to display temp, humidity, pressure, light, and motion.',
+  sketchy_sketch: 'Draw on your badge with this app!',
+  snarky_sciuridae: 'A virtual pet for your badge.',
+  tennis: 'Battle back and forth in this Pong-style game.',
+  tomato: 'Pomodoro timer to help you focus.'
+}
diff --git a/src/pages/edit.astro b/src/pages/edit.astro
index 57b5a5e..472c564 100644
--- a/src/pages/edit.astro
+++ b/src/pages/edit.astro
@@ -3,6 +3,7 @@ import Layout from '@/layouts/Layout.astro'
 import { BadgeManager } from '@/components/badge-manager'
 import EditorTools from '@/components/editor-tools.astro'
 import { getCollection } from 'astro:content'
+import { appDescriptions as catalogDescriptions } from '@/content/app-descriptions'
 
 const apps = await getCollection('apps')
 // Catalog folders from badger/home are matched by content slug and by the badge
@@ -13,6 +14,7 @@ const appDescriptions = Object.fromEntries(
     return [app.slug, ...(folder ? [folder] : [])].map((key) => [key, app.data.description])
   })
 )
+Object.assign(appDescriptions, catalogDescriptions)
 ---
 
 <Layout title="Badger Edit">