feat(codex-bridge): handoff instruction for Codex Desktop only (off by default)

User decision: the "larger work goes to AITURK" instruction lives only in what Codex IDE sees; the CLI must
not know it exists. The bridge adds it in flight by the originator header (measured: Codex Desktop, codex-tui,
codex_exec) and only when a send command is configured.

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

apps/desktop/assets/codex-bridge/test_is_hatti.py

@@ -0,0 +1,35 @@
+"""The "send larger work to AITURK" instruction reaches only Codex Desktop, and only when a send command exists."""
+import unittest
+
+import is_hatti as h
+
+
+class Hat(unittest.TestCase):
+    def test_only_the_desktop_app_is_recognised(self):
+        self.assertTrue(h.masaustu_mu("Codex Desktop"))
+        for other in ("codex-tui", "codex_exec", "codex_cli_rs", "", None, "Codex Desktop Helper"):
+            self.assertFalse(h.masaustu_mu(other), other)
+
+    def test_no_instruction_without_the_switch_or_without_a_send_command(self):
+        self.assertIsNone(h.talimat(None))
+        self.assertIsNone(h.talimat({"enabled": False, "komut": "aiturk gonder"}))
+        self.assertIsNone(h.talimat({"enabled": True}))
+        self.assertIsNone(h.talimat({"enabled": True, "komut": "  "}))
+        text = h.talimat({"enabled": True, "komut": "aiturk gonder --dosya is.md"})
+        self.assertIn("aiturk gonder --dosya is.md", text)
+        self.assertIn("sen yap", text)
+        self.assertEqual(h.talimat({"enabled": True, "komut": "x", "talimat": "ozel {komut}"}), "ozel x")
+
+    def test_instruction_is_put_first_once_and_never_repeated(self):
+        req = {"input": [{"type": "message", "role": "user", "content": "selam"}]}
+        text = h.talimat({"enabled": True, "komut": "aiturk gonder"})
+        self.assertTrue(h.ekle(req, text))
+        self.assertEqual((req["input"][0]["role"], len(req["input"])), ("developer", 2))
+        self.assertFalse(h.ekle(req, text))
+        self.assertEqual(len(req["input"]), 2)
+        self.assertFalse(h.ekle({"input": "duz metin"}, text))
+        self.assertFalse(h.ekle(req, None))
+
+
+if __name__ == "__main__":
+    unittest.main()