v0.4: Stochastic Foundation

package.json

@@ -1,8 +1,9 @@
 {
   "name": "@robotixai/calculator-engine",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Financial retirement projection engine with Monte Carlo simulation, multi-jurisdiction tax, and withdrawal strategies",
   "private": false,
+  "type": "module",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
   "exports": {
@@ -14,8 +15,9 @@
   },
   "files": ["dist", "README.md", "LICENSE"],
   "scripts": {
-    "build": "tsc",
-    "lint": "tsc --noEmit"
+    "build": "tsc && node scripts/fix-esm-extensions.mjs",
+    "lint": "tsc --noEmit",
+    "test": "node src/__tests__/smoke.test.mjs"
   },
   "dependencies": {},
   "devDependencies": {

scripts/fix-esm-extensions.mjs

@@ -0,0 +1,38 @@
+/**
+ * Post-build script: adds .js extensions to relative imports in dist/ so that
+ * Node's native ESM loader can resolve them without --experimental-specifier-resolution.
+ */
+import { readdir, readFile, writeFile } from 'node:fs/promises';
+import { join } from 'node:path';
+
+const DIST = new URL('../dist', import.meta.url).pathname;
+
+// Match: from './foo' or from '../foo' (no extension)
+const RE = /(from\s+['"])(\.\.?\/[^'"]+?)(['"])/g;
+
+async function walk(dir) {
+  const entries = await readdir(dir, { withFileTypes: true });
+  const files = [];
+  for (const e of entries) {
+    const full = join(dir, e.name);
+    if (e.isDirectory()) files.push(...(await walk(full)));
+    else if (e.name.endsWith('.js')) files.push(full);
+  }
+  return files;
+}
+
+const files = await walk(DIST);
+let patched = 0;
+
+for (const f of files) {
+  const src = await readFile(f, 'utf8');
+  const out = src.replace(RE, (match, pre, path, post) => {
+    // Skip if already has an extension
+    if (/\.\w+$/.test(path)) return match;
+    patched++;
+    return `${pre}${path}.js${post}`;
+  });
+  if (out !== src) await writeFile(f, out);
+}
+
+console.log(`fix-esm-extensions: patched ${patched} imports in ${files.length} files`);