update contributing instructions

CONTRIBUTING.md

@@ -38,6 +38,7 @@ npm install -g pnpm
 
 ```shell
 pnpm install
+pnpm install -g tsx
 ```
 
 ### Build the packages
@@ -48,6 +49,56 @@ To build all packages, run:
 pnpm build
 ```
 
+### Start Developing
+
+You can launch the package in dev-mode by running:
+
+```shell
+pnpm dev
+```
+
+This will use turbo to run all packages in watch-mode. This means you can make changes and have them automatically built.
+
+If you want to customize what packages are built/watched, you can run turbo directly and adjust the filter:
+
+```shell
+pnpm turbo run dev --filter="./packages/core" --concurrency=100
+```
+
+In another terminal, you can write and run any script needed to quickly test your changes. For example:
+
+```typescript
+import { createMemory, staticBlock } from "@llamaindex/core/memory";
+
+// Create memory with predefined context
+const memory = createMemory({
+  memoryBlocks: [
+    staticBlock({
+      content:
+        "The user is a software engineer who loves TypeScript and LlamaIndex.",
+      messageRole: "system",
+    }),
+  ],
+});
+
+async function main() {
+  const result = await memory.getLLM();
+  console.log(result);
+}
+
+void main().catch(console.error);
+```
+
+And run it with:
+
+```shell
+pnpm exec tsx my_script.ts
+```
+
+This flow allows you to easily test your changes without having to build the entire project.
+
+Once you are happy with your changes, be sure to add tests (and confirm existing tests are passing!).
+
 ### Run tests
 
 #### Unit tests

package.json

@@ -4,7 +4,7 @@
   "scripts": {
     "clean": "find . -type d \\( -name .turbo -o -name node_modules -o -name dist -o -name .next -o -name lib \\) -exec rm -rf {} +",
     "build": "turbo run build --filter=\"./packages/*\" --filter=\"./packages/providers/**\"",
-    "dev": "turbo run dev --filter=\"./packages/*\" --filter=\"./packages/providers/**\"",
+    "dev": "turbo run dev --filter=\"./packages/*\" --filter=\"./packages/providers/**\" --concurrency=100",
     "format": "prettier --ignore-unknown --cache --check .",
     "format:write": "prettier --ignore-unknown --write .",
     "lint": "turbo run lint",