fix(tui): route images with the live switched model

tests/tui_gateway/test_image_routing_stale_model.py

@@ -0,0 +1,34 @@
+"""Regression coverage for live TUI image-routing identity."""
+
+from types import SimpleNamespace
+from unittest.mock import patch
+
+from tui_gateway.server import _active_image_routing_identity
+
+
+def test_live_agent_identity_wins_after_model_switch():
+    agent = SimpleNamespace(provider="alibaba", model="qwen3.7-plus")
+
+    with patch(
+        "agent.auxiliary_client._read_main_provider",
+        side_effect=AssertionError("stale provider fallback used"),
+    ), patch(
+        "agent.auxiliary_client._read_main_model",
+        side_effect=AssertionError("stale model fallback used"),
+    ):
+        identity = _active_image_routing_identity(agent)
+
+    assert identity == ("alibaba", "qwen3.7-plus")
+
+
+def test_missing_agent_identity_uses_runtime_fallback():
+    agent = SimpleNamespace(provider="", model=None)
+
+    with patch(
+        "agent.auxiliary_client._read_main_provider", return_value="openai-codex"
+    ), patch(
+        "agent.auxiliary_client._read_main_model", return_value="gpt-5.5-codex"
+    ):
+        identity = _active_image_routing_identity(agent)
+
+    assert identity == ("openai-codex", "gpt-5.5-codex")

tui_gateway/server.py

@@ -5091,6 +5091,16 @@ def _resolve_checkpoint_hash(mgr, cwd: str, ref: str) -> str:
     raise ValueError(f"Invalid checkpoint number. Use 1-{len(checkpoints)}.")
 
 
+def _active_image_routing_identity(agent: Any) -> tuple[str, str]:
+    """Return the live provider/model, falling back before agent startup."""
+    from agent.auxiliary_client import _read_main_model, _read_main_provider
+
+    return (
+        getattr(agent, "provider", "") or _read_main_provider(),
+        getattr(agent, "model", "") or _read_main_model(),
+    )
+
+
 def _enrich_with_attached_images(user_text: str, image_paths: list[str]) -> str:
     """Pre-analyze attached images via vision and prepend descriptions to user text."""
     import asyncio, json as _json
@@ -9423,16 +9433,13 @@ def _run_prompt_submit(rid, sid: str, session: dict, text: Any) -> None:
                         decide_image_input_mode,
                         build_native_content_parts,
                     )
-                    from agent.auxiliary_client import (
-                        _read_main_model,
-                        _read_main_provider,
-                    )
                     from hermes_cli.config import load_config as _tui_load_config
 
                     _cfg = _tui_load_config()
+                    _provider, _model = _active_image_routing_identity(agent)
                     _mode = decide_image_input_mode(
-                        _read_main_provider(),
-                        _read_main_model(),
+                        _provider,
+                        _model,
                         _cfg,
                     )
                     if getattr(agent, "api_mode", "") == "codex_app_server":