diff --git a/backend/apps/agents/agents.py b/backend/apps/agents/agents.py
index 5e5094a6..1dc1bc8a 100644
--- a/backend/apps/agents/agents.py
+++ b/backend/apps/agents/agents.py
@@ -306,7 +306,7 @@ async def compact_session(session_id: str):
     session = agent_manager.sessions.get(session_id)
     if not session:
         raise HTTPException(status_code=404, detail="session not found")
-    fired = agent_manager._maybe_compact(session, force=True)
+    fired = agent_manager.p_maybe_compact(session, force=True)
     if fired:
         from backend.apps.agents.core.ws_manager import ws_manager
         try:
@@ -315,7 +315,7 @@ async def compact_session(session_id: str):
                 "reason": "compacted",
                 "compacted_through_msg_id": session.compacted_through_msg_id,
             })
-            await agent_manager._emit_context_update(
+            await agent_manager.p_emit_context_update(
                 session_id,
                 session,
                 input_tokens=_estimate_post_compact_input(session),
@@ -346,7 +346,7 @@ async def clear_session(session_id: str):
             "status": session.status,
             "session": session.model_dump(mode="json"),
         })
-        await agent_manager._emit_context_update(
+        await agent_manager.p_emit_context_update(
             session_id,
             session,
             input_tokens=0,
diff --git a/backend/apps/agents/browser/browser_agent.py b/backend/apps/agents/browser/browser_agent.py
index 779ea6e0..9452dd0a 100644
--- a/backend/apps/agents/browser/browser_agent.py
+++ b/backend/apps/agents/browser/browser_agent.py
@@ -848,7 +848,7 @@ async def run_browser_agent(
             except Exception:
                 pass
             session.status = "completed"
-            agent_manager._sync_session_close(session)
+            agent_manager.p_sync_session_close(session)
             await ws_manager.send_to_session(session_id, "agent:status", {
                 "session_id": session_id, "status": "completed",
                 "session": session.model_dump(mode="json"),
@@ -2149,7 +2149,7 @@ async def run_browser_agent(
             except Exception as e:
                 logger.warning(f"[browser-agent {session_id}] keep_open persist failed: {e}")
 
-        agent_manager._sync_session_close(session)
+        agent_manager.p_sync_session_close(session)
         await ws_manager.send_to_session(session_id, "agent:status", {
             "session_id": session_id,
             "status": final_status,
diff --git a/backend/main.py b/backend/main.py
index 457c47d5..56b41b90 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -868,7 +868,7 @@ async def session_compact(session_id: str):
     session = agent_manager.sessions.get(session_id)
     if not session:
         return JSONResponse({"error": "session not found"}, status_code=404)
-    did_compact = agent_manager._maybe_compact(session, force=True)
+    did_compact = agent_manager.p_maybe_compact(session, force=True)
     if did_compact:
         session.needs_fresh_session = True
     await _ws.send_to_session(session_id, "agent:context_status", {
diff --git a/backend/tests/test_browser_agent_loop.py b/backend/tests/test_browser_agent_loop.py
index b9f1f662..5e7f135d 100644
--- a/backend/tests/test_browser_agent_loop.py
+++ b/backend/tests/test_browser_agent_loop.py
@@ -83,7 +83,7 @@ def _install(monkeypatch, primary, aux):
     monkeypatch.setattr(cred_mod, "get_anthropic_client_for_model", _client_for, raising=True)
 
     monkeypatch.setattr(BA, "load_builtin_permissions", lambda: {}, raising=True)
-    monkeypatch.setattr(am_mod.agent_manager, "_sync_session_close", lambda *a, **k: None, raising=False)
+    monkeypatch.setattr(am_mod.agent_manager, "p_sync_session_close", lambda *a, **k: None, raising=True)
 
     # fake WS: record browser commands, script results by action
     sent = []