fix(dev): cap every app's Turbopack cache, not just apps/sim

`apps/docs` is a Next app too (`next dev --port 3001`) and overrides nothing, so
it uses the Next default where the dev filesystem cache is on. It already had an
uncapped 1.1 GB cache here, and the root `bun run dev` (`turbo run dev`) starts
it — so a teammate using the documented command was accumulating a cache nothing
would ever prune.

The script now resolves its target from the working directory instead of
hardcoding `apps/sim`, and each app chains its own cap. Per-app rather than one
sweep on purpose: a single pass would let one app's dev start delete a cache
another app is holding open, which costs that session its persistence.

Verified both: `apps/sim` and `apps/docs` each report and cap their own 1.1 GB
cache, and both dev servers start clean (`Ready in 299ms` / `229ms`, docs serving).

Author: waleedlatif1

apps/docs/package.json

@@ -4,7 +4,9 @@
   "private": true,
   "license": "Apache-2.0",
   "scripts": {
-    "dev": "next dev --port 3001",
+    "dev": "bun run dev:cache:cap && next dev --port 3001",
+    "dev:cache:cap": "bun run ../../scripts/prune-turbopack-cache.ts",
+    "dev:cache:prune": "bun run ../../scripts/prune-turbopack-cache.ts --force",
     "build": "fumadocs-mdx && NODE_OPTIONS='--max-old-space-size=8192' next build",
     "start": "next start",
     "postinstall": "fumadocs-mdx",

scripts/prune-turbopack-cache.ts

@@ -46,16 +46,13 @@ import path from 'node:path'
 const DEFAULT_MAX_GB = 20
 const BYTES_PER_GB = 1024 ** 3
 
-const CACHE_DIR = path.join(
-  import.meta.dirname,
-  '..',
-  'apps',
-  'sim',
-  '.next',
-  'dev',
-  'cache',
-  'turbopack'
-)
+/**
+ * Resolved from the working directory, not hardcoded to one app: every Next app
+ * in the monorepo has its own dev cache (`apps/docs` runs `next dev` too and, with
+ * no override, uses the Next default where the cache is on). Each app caps its
+ * own, so one app's dev start never prunes a cache another app is holding open.
+ */
+const CACHE_DIR = path.resolve(process.cwd(), '.next', 'dev', 'cache', 'turbopack')
 
 /** Sums the size of every regular file under `dir`, skipping symlinks. */
 async function directorySize(dir: string): Promise<number> {