refactor(memory): unify structured consolidation flow

tests/agent/test_autocompact_unit.py

@@ -7,7 +7,6 @@ import pytest
 
 from nanobot.agent.autocompact import AutoCompact
 from nanobot.session.manager import Session, SessionManager
-from nanobot.session.summary import SessionSummary
 
 
 def _runtime(_session: Session | None = None):
@@ -176,24 +175,6 @@ class TestIsExpired:
         assert ac._is_expired(expired, now=now) is True
 
 
-# ---------------------------------------------------------------------------
-# SessionSummary
-# ---------------------------------------------------------------------------
-
-
-class TestSessionSummary:
-    """Test prompt rendering for the structured summary value."""
-
-    def test_formats_prompt(self):
-        last_active = datetime(2026, 5, 13, 14, 30, 0)
-        summary = SessionSummary("User discussed Python.", last_active)
-
-        assert summary.for_prompt() == (
-            "Previous conversation summary (last active 2026-05-13T14:30:00):\n"
-            "User discussed Python."
-        )
-
-
 # ---------------------------------------------------------------------------
 # check_expired
 # ---------------------------------------------------------------------------
@@ -490,7 +471,7 @@ class TestArchiveDelegates:
 
         entry = ac._summaries.get("cli:test")
         assert entry is not None
-        assert entry.text == "Hello."
+        assert entry["text"] == "Hello."
 
     @pytest.mark.asyncio
     async def test_no_summary_when_compact_returns_empty(self):
@@ -569,21 +550,29 @@ class TestPrepareSession:
         ac = _make_autocompact()
         session = _make_session()
         last_active = datetime(2026, 5, 13, 14, 0, 0)
-        ac._summaries["cli:test"] = SessionSummary("Hot summary.", last_active)
+        ac._summaries["cli:test"] = {
+            "text": "Hot summary.",
+            "last_active": last_active.isoformat(),
+        }
 
         result_session, summary = ac.prepare_session(session, "cli:test")
 
         assert result_session is session
         assert summary is not None
-        assert summary.text == "Hot summary."
-        assert "Previous conversation summary" in summary.for_prompt()
+        assert summary == {
+            "text": "Hot summary.",
+            "last_active": last_active.isoformat(),
+        }
 
     def test_hot_path_pops_summary_one_shot(self):
         """Hot path should pop the summary (one-shot; second call returns None)."""
         ac = _make_autocompact()
         session = _make_session()
         last_active = datetime(2026, 1, 1)
-        ac._summaries["cli:test"] = SessionSummary("One-shot.", last_active)
+        ac._summaries["cli:test"] = {
+            "text": "One-shot.",
+            "last_active": last_active.isoformat(),
+        }
 
         _, summary1 = ac.prepare_session(session, "cli:test")
         assert summary1 is not None
@@ -606,7 +595,7 @@ class TestPrepareSession:
 
         assert result_session is session
         assert summary is not None
-        assert summary.text == "Cold summary."
+        assert summary["text"] == "Cold summary."
 
     def test_cold_path_tolerates_malformed_last_active(self):
         """A malformed persisted last_active must not raise on the turn path.
@@ -629,8 +618,10 @@ class TestPrepareSession:
 
         assert result_session is session
         assert summary is not None
-        assert summary.text == "Cold summary."
-        assert summary.last_active == fallback
+        assert summary == {
+            "text": "Cold summary.",
+            "last_active": fallback.isoformat(),
+        }
 
     def test_cold_path_tolerates_missing_last_active(self):
         """A _last_summary dict without last_active must not raise."""
@@ -645,8 +636,10 @@ class TestPrepareSession:
 
         assert result_session is session
         assert summary is not None
-        assert summary.text == "Cold summary."
-        assert summary.last_active == fallback
+        assert summary == {
+            "text": "Cold summary.",
+            "last_active": fallback.isoformat(),
+        }
 
     def test_cold_path_missing_text_returns_none(self):
         """A _last_summary without a non-empty string text yields no summary."""
@@ -677,7 +670,10 @@ class TestPrepareSession:
         ac.sessions = mock_sm
         key = "dream:20260602-155256"
         ac._archiving.add(key)
-        ac._summaries[key] = SessionSummary("Hot summary.", datetime(2026, 6, 2, 15, 52, 56))
+        ac._summaries[key] = {
+            "text": "Hot summary.",
+            "last_active": "2026-06-02T15:52:56",
+        }
         session = _make_session(
             key=key,
             updated_at=datetime.now() - timedelta(minutes=20),
@@ -717,9 +713,12 @@ class TestPrepareSession:
             },
         })
         last_active = datetime(2026, 5, 13, 14, 0, 0)
-        ac._summaries["cli:test"] = SessionSummary("Hot summary.", last_active)
+        ac._summaries["cli:test"] = {
+            "text": "Hot summary.",
+            "last_active": last_active.isoformat(),
+        }
 
         _, summary = ac.prepare_session(session, "cli:test")
         assert summary is not None
-        assert summary.text == "Hot summary."
+        assert summary["text"] == "Hot summary."
         # After hot path pops, cold path would kick in on next call