docs(getting-started): the agent wires new files by barrel export, not by stack keys

Build with Claude Code said the agent wires the action, view and app through
`actions:` / `views:` / `apps:` arrays in defineStack(). On the wired
starter those keys already read the barrels through exportsOf(), so a
second key duplicates it (tsc TS1117) and replaces the barrel's wiring (a
later `os g view` reports Not wired). The page now says each file is
exported from its directory's index.ts, which is the whole wiring.

Claude-Session: https://claude.ai/code/session_01UYBdGBzWSrAMzpW8ah3GbP
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

content/docs/getting-started/build-with-claude-code.mdx

@@ -223,12 +223,16 @@ export const SupportApp = defineApp({
 });
 ```
 
-The agent also **wires the new files into `objectstack.config.ts`** — the object
-through the `src/objects/index.ts` barrel, and the action, view and app via the
-`actions:` / `views:` / `apps:` arrays in `defineStack()`. There is no
-filename-suffix magic: metadata exists in the app only if the config imports it,
-so if a freshly-authored action doesn't show up, the wiring is the first thing to
-check.
+The agent also **exports each new file from its directory's barrel** — the object
+from `src/objects/index.ts`, and the action, view and app from
+`src/actions/index.ts`, `src/views/index.ts` and `src/apps/index.ts`. The
+starter's `objectstack.config.ts` already hands every barrel to `defineStack()`
+through `exportsOf()`, so that export line is the whole wiring and the config is
+not edited; adding an `actions:` / `views:` / `apps:` key for the file instead
+would duplicate the key and replace that barrel's wiring. There is no
+filename-suffix magic: metadata exists in the app only if its barrel exports it,
+so if a freshly-authored action doesn't show up, its export line is the first
+thing to check.
 
 What it does **not** touch is the starter `note` object the `blank` template
 scaffolded in step 1 (`src/objects/note.object.ts`, two fields). Nothing asked