Update dev script

Author: amterp

.gitignore

@@ -1,2 +1,3 @@
 .idea
 CLAUDE.md
+RAD_SYNTAX.md

AGENTS.md

@@ -65,3 +65,8 @@ Each show file (`data/{imdbId}.json`) uses a compact array format:
 **Episode schema:** `[episode, rating, votes, id]` — positional array, no keys.
 
 The frontend deserializes this to `Episode` objects in `useShowData.ts`.
+
+## Rad Scripts
+
+You may have to write Rad scripts. See the [RAD_SYNTAX.md](./RAD_SYNTAX.md) reference file for help on how.
+The local [dev](./dev) script is an example of this.

dev

@@ -4,8 +4,12 @@ Facilitates imdb-ratings development.
 ---
 args:
     run r bool   # Run in dev.
+    data d int?  # Run the data script for this many top shows.
+
+    data range [0,]
 
 if run: 
     $`cd app && npm run dev`
 
-
+if data:
+    $`python scripts/create_dataset.py -n {data}`