fix(mrt-utilities): strip development export conditions during pack to prevent consumer resolution failures

.changeset/mrt-utilities-strip-dev-exports.md

@@ -0,0 +1,5 @@
+---
+'@salesforce/mrt-utilities': patch
+---
+
+Fix package export resolution for consumers by stripping `development` export conditions during `prepack`, so published tarballs always resolve to shipped `dist` files.

packages/mrt-utilities/package.json

@@ -102,7 +102,9 @@
     "test": "c8 mocha --forbid-only \"test/**/*.test.ts\"",
     "test:ci": "c8 mocha --forbid-only --reporter json --reporter-option output=test-results.json \"test/**/*.test.ts\"",
     "test:agent": "mocha --forbid-only --reporter min \"test/**/*.test.ts\"",
-    "test:watch": "mocha --watch \"test/**/*.test.ts\""
+    "test:watch": "mocha --watch \"test/**/*.test.ts\"",
+    "prepack": "node scripts/strip-dev-exports.cjs",
+    "postpack": "git checkout package.json"
   },
   "dependencies": {
     "@aws-sdk/client-cloudwatch": "3.952.0",

packages/mrt-utilities/scripts/strip-dev-exports.cjs

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2025, Salesforce, Inc.
+ * SPDX-License-Identifier: Apache-2
+ * For full license text, see the license.txt file in the repo root or http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+/**
+ * Strips "development" conditions from package.json exports before packing.
+ *
+ * The "development" condition maps to TypeScript source files (./src/...)
+ * which are not included in the published package. This prevents
+ * MODULE_NOT_FOUND errors when consumers install the package from npm.
+ *
+ * Called by the "prepack" script; "postpack" restores via git checkout.
+ */
+/* eslint-disable @typescript-eslint/no-require-imports */
+const fs = require('fs');
+const path = require('path');
+
+const pkgPath = path.join(__dirname, '..', 'package.json');
+const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf8'));
+
+let stripped = 0;
+
+if (pkg.exports) {
+  for (const [, value] of Object.entries(pkg.exports)) {
+    if (value && typeof value === 'object' && 'development' in value) {
+      delete value.development;
+      stripped++;
+    }
+  }
+}
+
+if (stripped > 0) {
+  fs.writeFileSync(pkgPath, JSON.stringify(pkg, null, 2) + '\n');
+  console.log(`Stripped "development" condition from ${stripped} export(s)`);
+}