test(ultraplan-local): add ultracontinue to FLAG_SCHEMA + tests

Step 1 of v3.4.1 hot-fix plan (project 2026-05-04-v3.3.1-ultracontinue-fixes).

Adds ultracontinue entry to FLAG_SCHEMA covering boolean flags --help,
--cleanup, --confirm, --dry-run with no valued flags. The -h short form
is intentionally not aliased: it appears as positional[0] === '-h' and
the command prose dispatches usage on either condition.

7 new tests in tests/lib/arg-parser.test.mjs verify empty args, --help,
-h positional, --cleanup, --cleanup --confirm, project-dir positional,
and .md positional (parser-level accept; command-level reject).

plugins/ultraplan-local/lib/parsers/arg-parser.mjs

@@ -31,6 +31,11 @@ const FLAG_SCHEMA = {
     valued: ['--project', '--since'],
     aliases: {},
   },
+  ultracontinue: {
+    boolean: ['--help', '--cleanup', '--confirm', '--dry-run'],
+    valued: [],
+    aliases: {},
+  },
 };
 
 /**

plugins/ultraplan-local/tests/lib/arg-parser.test.mjs

@@ -96,3 +96,45 @@ test('ultrareview — unknown flag goes to unknown[]', () => {
   const r = parseArgs('--mystery foo', 'ultrareview');
   assert.ok(r.unknown.includes('--mystery'));
 });
+
+test('ultracontinue — empty args produce no flags and no positional', () => {
+  const r = parseArgs('', 'ultracontinue');
+  assert.equal(r.command, 'ultracontinue');
+  assert.deepEqual(r.flags, {});
+  assert.deepEqual(r.positional, []);
+  assert.deepEqual(r.errors, []);
+});
+
+test('ultracontinue — --help boolean flag', () => {
+  const r = parseArgs('--help', 'ultracontinue');
+  assert.equal(r.flags['--help'], true);
+});
+
+test('ultracontinue — -h treated as positional (no alias resolution)', () => {
+  const r = parseArgs('-h', 'ultracontinue');
+  assert.deepEqual(r.positional, ['-h']);
+  assert.deepEqual(r.errors, []);
+  assert.equal(r.flags['--help'], undefined);
+});
+
+test('ultracontinue — --cleanup boolean flag', () => {
+  const r = parseArgs('--cleanup', 'ultracontinue');
+  assert.equal(r.flags['--cleanup'], true);
+});
+
+test('ultracontinue — --cleanup --confirm both flags', () => {
+  const r = parseArgs('--cleanup --confirm', 'ultracontinue');
+  assert.equal(r.flags['--cleanup'], true);
+  assert.equal(r.flags['--confirm'], true);
+});
+
+test('ultracontinue — positional project dir captured', () => {
+  const r = parseArgs('.claude/projects/2026-05-04-foo', 'ultracontinue');
+  assert.deepEqual(r.positional, ['.claude/projects/2026-05-04-foo']);
+});
+
+test('ultracontinue — .md positional accepted by parser (rejection is command-level)', () => {
+  const r = parseArgs('NEXT-SESSION-PROMPT.local.md', 'ultracontinue');
+  assert.deepEqual(r.positional, ['NEXT-SESSION-PROMPT.local.md']);
+  assert.deepEqual(r.errors, []);
+});