test(stats): a project_dir inside cwd finds the repo that holds it

/trekreview of e7ac34b..3f073b7 (WARN, 1 MAJOR, finding
986c939f93808a274b5e4ecd2c5318fd422a3be4): baseDir's accepting branch
was never exercised, though every production /trekbrief record carries
project_dir. One unit test (attributeOrder from a non-git parent with
projectDir inside it) and one end-to-end landing test (the Phase 7 line
with a record carrying project_dir).

Both pass on HEAD and both fail on the always-cwd mutant (measured,
then reverted). Suite 1364 (1362/0/2).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/lib/claimed-order.test.mjs

@@ -278,3 +278,17 @@ test('attributeOrder: finds the claimed order of the cwd repo; a projectDir outs
     assert.equal(attributeOrder({ cwd: a.dir, env, projectDir: '../../' + b.parent.split('/').pop() + '/repo-b' }).order_reason, 'none-claimed');
   } finally { cleanup(a.parent, b.parent, coord); }
 });
+
+test('attributeOrder: a projectDir inside cwd moves the lookup to the repo that holds it', async () => {
+  const { attributeOrder } = await load();
+  const m = repo('mbx');
+  const coord = fixture(claimed('mbx', 'o-1'));
+  try {
+    mkdirSync(join(m.dir, '.claude', 'projects', 'x'), { recursive: true });
+    const env = { CLAUDE_COORD_DIR: coord, HOME: m.parent };
+    // Control: cwd (the repo's parent) is outside git, so without projectDir there is no mailbox.
+    assert.equal(attributeOrder({ cwd: m.parent, env }).order_reason, 'mailbox-unresolved');
+    assert.deepEqual(attributeOrder({ cwd: m.parent, env, projectDir: 'mbx/.claude/projects/x' }),
+      { order_id: 'o-1', order_claimed_at: '2026-10-04T10:00:00Z', order_reason: null });
+  } finally { cleanup(m.parent, coord); }
+});

tests/lib/stats-landing.test.mjs

@@ -239,6 +239,19 @@ test('order: one claimed order in the repo\'s mailbox lands in the trekbrief rec
   } finally { rmSync(home, { recursive: true, force: true }); rmSync(repo.parent, { recursive: true, force: true }); rmSync(coord, { recursive: true, force: true }); }
 });
 
+test('order: the record\'s own project_dir finds the mailbox when the shell stands outside the repo', () => {
+  const home = mkdtempSync(join(tmpdir(), 'stats-landing-'));
+  const repo = gitRepo('mbx');
+  const coord = coordWith({ mbx: ['o-1'] });
+  try {
+    mkdirSync(join(repo.dir, '.claude', 'projects', 'x'), { recursive: true });
+    const rec = landTrekbrief({ ts: '2026-10-04T18:00:00Z', slug: 's', project_dir: 'mbx/.claude/projects/x' },
+      { repo: repo.parent, coord, home });
+    assert.equal(rec.order_id, 'o-1');
+    assert.equal(rec.order_reason, null);
+  } finally { rmSync(home, { recursive: true, force: true }); rmSync(repo.parent, { recursive: true, force: true }); rmSync(coord, { recursive: true, force: true }); }
+});
+
 test('order: zero claimed orders - the three keys are PRESENT, order_id null, reason none-claimed', () => {
   const home = mkdtempSync(join(tmpdir(), 'stats-landing-'));
   const repo = gitRepo('mbx');