diff --git a/nanobot/command/builtin.py b/nanobot/command/builtin.py
index 10eb995cf..6280e2dfe 100644
--- a/nanobot/command/builtin.py
+++ b/nanobot/command/builtin.py
@@ -212,7 +212,7 @@ async def cmd_new(ctx: CommandContext) -> OutboundMessage:
     loop.sessions.save(session)
     loop.sessions.invalidate(session.key)
     if snapshot:
-        loop._schedule_background(loop.consolidator.archive(snapshot))
+        loop._schedule_background(loop.consolidator.archive(snapshot, session_key=ctx.key))
     return OutboundMessage(
         channel=ctx.msg.channel, chat_id=ctx.msg.chat_id,
         content="New session started.",
diff --git a/tests/agent/test_consolidate_offset.py b/tests/agent/test_consolidate_offset.py
index c4b0e9ea8..74e796144 100644
--- a/tests/agent/test_consolidate_offset.py
+++ b/tests/agent/test_consolidate_offset.py
@@ -519,8 +519,9 @@ class TestNewCommandArchival:
 
         call_count = 0
 
-        async def _failing_summarize(_messages) -> bool:
+        async def _failing_summarize(_messages, *, session_key=None) -> bool:
             nonlocal call_count
+            assert session_key == "cli:test"
             call_count += 1
             return False
 
@@ -551,10 +552,12 @@ class TestNewCommandArchival:
         loop.sessions.save(session)
 
         archived_count = -1
+        archived_session_key = None
 
-        async def _fake_summarize(messages) -> bool:
-            nonlocal archived_count
+        async def _fake_summarize(messages, *, session_key=None) -> bool:
+            nonlocal archived_count, archived_session_key
             archived_count = len(messages)
+            archived_session_key = session_key
             return True
 
         loop.consolidator.archive = _fake_summarize  # type: ignore[method-assign]
@@ -567,6 +570,7 @@ class TestNewCommandArchival:
 
         await loop.close_mcp()
         assert archived_count == 3
+        assert archived_session_key == "cli:test"
 
     @pytest.mark.asyncio
     async def test_new_clears_session_and_responds(self, tmp_path: Path) -> None:
@@ -579,7 +583,8 @@ class TestNewCommandArchival:
             session.add_message("assistant", f"resp{i}")
         loop.sessions.save(session)
 
-        async def _ok_summarize(_messages) -> bool:
+        async def _ok_summarize(_messages, *, session_key=None) -> bool:
+            assert session_key == "cli:test"
             return True
 
         loop.consolidator.archive = _ok_summarize  # type: ignore[method-assign]
@@ -606,7 +611,8 @@ class TestNewCommandArchival:
         archived = asyncio.Event()
         release_archive = asyncio.Event()
 
-        async def _slow_summarize(_messages) -> bool:
+        async def _slow_summarize(_messages, *, session_key=None) -> bool:
+            assert session_key == "cli:test"
             await release_archive.wait()
             archived.set()
             return True
diff --git a/tests/agent/test_loop_consolidation_tokens.py b/tests/agent/test_loop_consolidation_tokens.py
index 3228bd6dd..3c1f6fcbb 100644
--- a/tests/agent/test_loop_consolidation_tokens.py
+++ b/tests/agent/test_loop_consolidation_tokens.py
@@ -219,8 +219,11 @@ async def test_preflight_consolidation_before_llm_call(tmp_path, monkeypatch) ->
 
     loop = _make_loop(tmp_path, estimated_tokens=0, context_window_tokens=200)
 
-    async def track_consolidate(messages):
+    archived_session_keys: list[str | None] = []
+
+    async def track_consolidate(messages, *, session_key=None):
         order.append("consolidate")
+        archived_session_keys.append(session_key)
         return True
     loop.consolidator.archive = track_consolidate  # type: ignore[method-assign]
 
@@ -251,3 +254,4 @@ async def test_preflight_consolidation_before_llm_call(tmp_path, monkeypatch) ->
     assert "consolidate" in order
     assert "llm" in order
     assert order.index("consolidate") < order.index("llm")
+    assert archived_session_keys == ["cli:test"]