update README with sdk build steps

README.md

@@ -19,6 +19,9 @@ cd <project-folder>
 # Install dependencies
 npm install
 
+# Build the SDK (required before building the extension)
+cd sdk && npm run build && cd ..
+
 # Build extension
 npm run build
 ```
@@ -48,6 +51,15 @@ After changes, click the refresh icon in `chrome://extensions` to reload.
 npm run build
 ```
 
+### Working with the SDK
+
+The extension depends on the local `@nockbox/iris-sdk` package (in the `sdk/` directory). If you modify SDK source files, rebuild it before building the extension:
+
+```bash
+cd sdk && npm run build && cd ..
+npm run build
+```
+
 ## WASM Modules
 
 WASM binaries are **pre-built and included** in `extension/lib/`. No build required.

package.json

@@ -28,7 +28,7 @@
   "dependencies": {
     "@fontsource/inter": "^5.2.8",
     "@fontsource/lora": "^5.2.8",
-    "@nockbox/iris-sdk": "file:./sdk",
+    "@nockbox/iris-sdk": "file:sdk",
     "@scure/base": "^2.0.0",
     "@scure/bip39": "^2.0.1",
     "react": "^19.2.0",