Merge pull request #3124 from gsd-build/fix/3050-update-backup-step-crashes-with-eacces-w

fix: make update custom-file backup resilient to EACCES

tests/bug-3050-update-backup-eacces-nonfatal.test.cjs

@@ -0,0 +1,24 @@
+'use strict';
+
+const { test, describe } = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+
+describe('bug #3050: update backup skips unreadable files non-fatally', () => {
+  test('update workflow backup loop wraps copyFileSync in try/catch and logs non-fatal skip', () => {
+    const content = fs.readFileSync(
+      path.join(__dirname, '..', 'get-shit-done', 'workflows', 'update.md'),
+      'utf8',
+    );
+
+    const hasTryCatch = /try\s*\{[\s\S]*copyFileSync\([\s\S]*\}[\s\S]*catch\s*\(err\)/.test(content);
+    assert.ok(hasTryCatch, 'backup copy loop must catch per-file copy errors');
+
+    const hasNonFatalSkipMessage = /Skipped \(non-fatal\):/.test(content);
+    assert.ok(
+      hasNonFatalSkipMessage,
+      'workflow must log a non-fatal skip message for unreadable custom files',
+    );
+  });
+});