feat(memory): restore Dream model preset override (#5107)

tests/agent/test_dream.py

@@ -3,6 +3,7 @@
 import pytest
 
 from nanobot.agent.memory import MemoryStore
+from nanobot.config.schema import ModelPresetConfig
 from nanobot.providers.base import LLMResponse
 from nanobot.security.workspace_access import (
     bind_workspace_scope,
@@ -385,6 +386,21 @@ class TestEphemeralDirect:
 
         return loop, store
 
+    def test_dream_runtime_uses_preset_without_changing_default(self, _make_loop):
+        loop, _ = _make_loop
+        loop.runtime_resolver._model_presets = {
+            "dream": ModelPresetConfig(model="dream-model"),
+        }
+        loop.dream_model_preset = "dream"
+
+        runtime = loop.dream_runtime()
+
+        assert runtime is not None
+        assert runtime.model == "dream-model"
+        assert runtime.model_preset == "dream"
+        assert loop.model == "test-model"
+        assert loop.model_preset is None
+
     async def test_ephemeral_skips_raw_archive(self, tmp_path, _make_loop):
         """When ephemeral=True, raw_archive must not be called."""
         from unittest.mock import patch

tests/command/test_builtin_dream.py

@@ -171,11 +171,13 @@ async def test_dream_internal_run_silences_progress(tmp_path) -> None:
 
     sessions_dir = tmp_path / "sessions"
     sessions_dir.mkdir()
+    dream_runtime = object()
     loop = SimpleNamespace(
         bus=bus,
         context=SimpleNamespace(memory=store, timezone="UTC"),
         sessions=SimpleNamespace(sessions_dir=sessions_dir),
         process_direct=process_direct,
+        dream_runtime=lambda: dream_runtime,
     )
     ctx = CommandContext(msg=msg, session=None, key=msg.session_key, raw="/dream", args="", loop=loop)
 
@@ -184,6 +186,7 @@ async def test_dream_internal_run_silences_progress(tmp_path) -> None:
 
     assert len(calls) == 1
     assert callable(calls[0][1]["on_progress"])
+    assert calls[0][1]["runtime"] is dream_runtime
 
 
 def _build_runnable_dream(

tests/config/test_model_presets.py

@@ -267,6 +267,24 @@ def test_validator_rejects_unknown_preset() -> None:
         })
 
 
+def test_validator_accepts_dream_model_preset() -> None:
+    config = Config.model_validate({
+        "modelPresets": {
+            "dream": {"model": "anthropic/claude-haiku-4-5", "provider": "anthropic"},
+        },
+        "agents": {"defaults": {"dream": {"modelOverride": "dream"}}},
+    })
+
+    assert config.agents.defaults.dream.model_override == "dream"
+
+
+def test_validator_rejects_unknown_dream_model_preset() -> None:
+    with pytest.raises(ValueError, match="Dream model preset 'unknown' not found"):
+        Config.model_validate({
+            "agents": {"defaults": {"dream": {"modelOverride": "unknown"}}},
+        })
+
+
 def test_model_preset_accepts_explicit_default_name() -> None:
     config = Config.model_validate({
         "agents": {