diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 5c6f32f80..1f3497a0f 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -94,9 +94,9 @@ make dev
 Behavior:
 
 - Stops existing local services first.
-- Starts LangGraph (`2024`), Gateway (`8001`), Frontend (`3000`), nginx (`2026`).
+- Starts Gateway (`8001`, with the embedded LangGraph-compatible runtime), Frontend (`3000`), nginx (`2026`). There is no standalone LangGraph service.
 - Unified app endpoint: `http://localhost:2026`.
-- Logs: `logs/langgraph.log`, `logs/gateway.log`, `logs/frontend.log`, `logs/nginx.log`.
+- Logs: `logs/gateway.log`, `logs/frontend.log`, `logs/nginx.log`.
 
 Stop services:
 
diff --git a/backend/packages/harness/deerflow/agents/middlewares/sandbox_audit_middleware.py b/backend/packages/harness/deerflow/agents/middlewares/sandbox_audit_middleware.py
index e41f5912a..ad7d02357 100644
--- a/backend/packages/harness/deerflow/agents/middlewares/sandbox_audit_middleware.py
+++ b/backend/packages/harness/deerflow/agents/middlewares/sandbox_audit_middleware.py
@@ -201,7 +201,7 @@ class SandboxAuditMiddleware(AgentMiddleware[ThreadState]):
     1. **Command classification**: regex + shlex analysis grades commands as
        high-risk (block), medium-risk (warn), or safe (pass).
     2. **Audit log**: every bash call is recorded as a structured JSON entry
-       via the standard logger (visible in langgraph.log).
+       via the standard logger (visible in gateway.log).
 
     High-risk commands (e.g. ``rm -rf /``, ``curl url | bash``) are blocked:
     the handler is not called and an error ``ToolMessage`` is returned so the
diff --git a/backend/tests/test_gateway_runtime_cleanup.py b/backend/tests/test_gateway_runtime_cleanup.py
index 145ef0eab..7574124c0 100644
--- a/backend/tests/test_gateway_runtime_cleanup.py
+++ b/backend/tests/test_gateway_runtime_cleanup.py
@@ -147,3 +147,14 @@ def test_gateway_runtime_docs_do_not_reference_transition_modes():
         assert "./scripts/deploy.sh --gateway" not in content, path
         assert "docker compose --profile gateway" not in content, path
         assert "`/api/langgraph/*` → LangGraph" not in content, path
+
+
+def test_agent_instruction_docs_do_not_reference_standalone_langgraph_server():
+    """Agent/Copilot instruction docs must describe only the Gateway-embedded
+    runtime — no standalone LangGraph service, port 2024, or langgraph.log."""
+    content = _read(".github/copilot-instructions.md")
+
+    assert "langgraph.log" not in content
+    assert "localhost:2024" not in content
+    assert "127.0.0.1:2024" not in content
+    assert "Starts LangGraph" not in content