chore: import upstream snapshot with attribution

tests/commands/plan-command.test.js

@@ -0,0 +1,76 @@
+'use strict';
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+const repoRoot = path.resolve(__dirname, '..', '..');
+const planCommandPath = path.join(repoRoot, 'commands', 'plan.md');
+
+let passed = 0;
+let failed = 0;
+
+function test(name, fn) {
+  try {
+    fn();
+    console.log(`  ✓ ${name}`);
+    passed++;
+  } catch (error) {
+    console.log(`  ✗ ${name}`);
+    console.log(`    Error: ${error.message}`);
+    failed++;
+  }
+}
+
+function readPlanCommand() {
+  return fs.readFileSync(planCommandPath, 'utf8');
+}
+
+console.log('\n=== Testing /plan command prompt ===\n');
+
+test('/plan runs inline by default without requiring planner agent installation', () => {
+  const source = readPlanCommand();
+
+  assert.ok(
+    source.includes('Do not call the Task tool or any subagent by default'),
+    'Expected /plan to avoid default subagent delegation',
+  );
+  assert.ok(
+    source.includes('If the `planner` subagent is unavailable'),
+    'Expected /plan to define a planner-unavailable fallback',
+  );
+  assert.ok(
+    !source.includes('This command invokes the **planner** agent'),
+    'Expected /plan not to claim unconditional planner invocation',
+  );
+  assert.ok(
+    !source.includes('The planner agent will:'),
+    'Expected /plan to describe inline behavior, not mandatory agent behavior',
+  );
+  assert.ok(
+    !source.includes('Agent (planner):'),
+    'Expected /plan examples not to imply the planner agent is required',
+  );
+});
+
+test('/plan preserves the explicit confirmation gate before code edits', () => {
+  const source = readPlanCommand();
+
+  assert.ok(
+    source.includes('WAIT for user CONFIRM before touching any code'),
+    'Expected frontmatter to preserve the no-code-before-confirmation rule',
+  );
+  assert.ok(
+    source.includes('WAITING FOR CONFIRMATION'),
+    'Expected example output to preserve the confirmation handoff',
+  );
+  assert.ok(
+    source.includes('will **NOT** write any code until you explicitly confirm'),
+    'Expected important notes to preserve the confirmation contract',
+  );
+});
+
+console.log(`\nPassed: ${passed}`);
+console.log(`Failed: ${failed}`);
+
+process.exit(failed > 0 ? 1 : 0);