refactor: externalize imports

tsup.samples.config.ts

@@ -3,6 +3,7 @@ import { fileURLToPath } from 'url';
 import * as fs from 'fs';
 import * as path from 'path';
 import {csvLoader} from 'inline-schema/csv-loader/esbuild';
+import type { Plugin } from 'esbuild';
 
 const srcDir = fileURLToPath(new URL('./src', import.meta.url));
 const samplesDir = fileURLToPath(new URL('./src/samples', import.meta.url));
@@ -30,6 +31,32 @@ function getSamplesEntries(): Record<string, string> {
 
 const samplesEntries = getSamplesEntries();
 
+/**
+ * Plugin to rewrite @/core/* and @/utils/* imports to use 'boardgame-core'
+ */
+function rewriteBoardgameImports(): Plugin {
+  return {
+    name: 'rewrite-boardgame-imports',
+    setup(build) {
+      build.onResolve({ filter: /^@\/(core|utils)\// }, args => {
+        // Mark these as external and rewrite to 'boardgame-core'
+        return {
+          path: 'boardgame-core',
+          external: true,
+        };
+      });
+      
+      // Also handle @/index imports
+      build.onResolve({ filter: /^@\/index$/ }, args => {
+        return {
+          path: 'boardgame-core',
+          external: true,
+        };
+      });
+    },
+  };
+}
+
 export default defineConfig({
   entry: samplesEntries,
   format: ['esm'],
@@ -38,10 +65,5 @@ export default defineConfig({
   sourcemap: true,
   outDir: 'dist/samples',
   external: ['@preact/signals-core', 'mutative', 'inline-schema', 'boardgame-core'],
-  esbuildPlugins: [csvLoader()],
-  esbuildOptions(options) {
-    options.alias = {
-      '@': srcDir,
-    };
-  },
+  esbuildPlugins: [csvLoader(), rewriteBoardgameImports()],
 });