Consolidate top-priority contributor PRs (#235 + #339 + #293 + #294 + #295) (#362)

Lands 5 high-priority contributor PRs as one bundle, with original authorship preserved on every commit, plus follow-up commits from me to make each PR CI-green and non-regressive. See PR #362 for the full per-author commit breakdown and credits.

Credits: @tomaioo (#235), @Dilligaf371 (#339), @TX-Huang (#293, #294, #295).

rust/crates/openjarvis-python/src/skills.rs

@@ -48,17 +48,81 @@ impl PySkillManifest {
     }
 
     fn verify_signature(&self, public_key_hex: &str) -> bool {
-        let key_bytes: Vec<u8> = (0..public_key_hex.len())
-            .step_by(2)
-            .filter_map(|i| u8::from_str_radix(&public_key_hex[i..i + 2], 16).ok())
-            .collect();
-        openjarvis_skills::verify_signature(&self.inner, &key_bytes)
+        match parse_public_key_hex(public_key_hex) {
+            Some(key_bytes) => openjarvis_skills::verify_signature(&self.inner, &key_bytes),
+            None => false,
+        }
     }
 }
 
+fn parse_public_key_hex(public_key_hex: &str) -> Option<Vec<u8>> {
+    if !public_key_hex.len().is_multiple_of(2) {
+        return None;
+    }
+    if !public_key_hex.is_ascii() {
+        return None;
+    }
+
+    let mut key_bytes = Vec::with_capacity(public_key_hex.len() / 2);
+    for i in (0..public_key_hex.len()).step_by(2) {
+        match u8::from_str_radix(&public_key_hex[i..i + 2], 16) {
+            Ok(byte) => key_bytes.push(byte),
+            Err(_) => return None,
+        }
+    }
+    Some(key_bytes)
+}
+
 #[pyfunction]
 pub fn load_skill(toml_str: &str) -> PyResult<PySkillManifest> {
     let manifest = openjarvis_skills::load_skill(toml_str)
         .map_err(|e| PyErr::new::<pyo3::exceptions::PyValueError, _>(e))?;
     Ok(PySkillManifest { inner: manifest })
 }
+
+#[cfg(test)]
+mod tests {
+    use super::parse_public_key_hex;
+
+    #[test]
+    fn empty_input_returns_empty_vec() {
+        assert_eq!(parse_public_key_hex(""), Some(Vec::new()));
+    }
+
+    #[test]
+    fn valid_hex_decodes() {
+        assert_eq!(
+            parse_public_key_hex("0a1b2cFF"),
+            Some(vec![0x0a, 0x1b, 0x2c, 0xff])
+        );
+    }
+
+    #[test]
+    fn odd_length_rejected_without_panic() {
+        // Regression: the pre-fix implementation sliced public_key_hex[i..i+2]
+        // on an odd-length string, triggering an out-of-bounds panic and a
+        // DoS vector when the input was attacker-controlled.
+        assert_eq!(parse_public_key_hex("0"), None);
+        assert_eq!(parse_public_key_hex("abc"), None);
+        assert_eq!(parse_public_key_hex("0a1b2"), None);
+    }
+
+    #[test]
+    fn non_hex_chars_rejected() {
+        // Pre-fix `filter_map` silently dropped non-hex chars and produced a
+        // truncated key, which would also have caused verification surprises.
+        assert_eq!(parse_public_key_hex("zz"), None);
+        assert_eq!(parse_public_key_hex("0aZZ"), None);
+        assert_eq!(parse_public_key_hex("gh"), None);
+    }
+
+    #[test]
+    fn multibyte_utf8_rejected_without_panic() {
+        // Pre-fix indexing public_key_hex[i..i+2] on a non-ASCII string could
+        // split a multi-byte UTF-8 codepoint and panic. The ASCII-only check
+        // makes the rejection explicit instead of relying on from_str_radix's
+        // post-slice error path.
+        assert_eq!(parse_public_key_hex("é"), None);
+        assert_eq!(parse_public_key_hex("aaé"), None);
+    }
+}

src/openjarvis/cli/__init__.py

@@ -140,6 +140,15 @@ except ImportError:
 
 def main() -> None:
     """Entry point registered as ``jarvis`` console script."""
+    import sys
+
+    if sys.platform == "win32":
+        for _stream in (sys.stdout, sys.stderr):
+            if hasattr(_stream, "reconfigure"):
+                try:
+                    _stream.reconfigure(encoding="utf-8", errors="replace")
+                except (AttributeError, OSError):
+                    pass
     cli()
 
 

src/openjarvis/cli/ask.py

@@ -357,6 +357,22 @@ def _run_agent(
     if capability_policy is not None:
         agent_kwargs["capability_policy"] = capability_policy
 
+    # Wire the SystemPromptBuilder so SOUL.md / MEMORY.md / USER.md persona
+    # files actually reach the model. Only passed to agents whose __init__
+    # accepts a `prompt_builder` kwarg (BaseAgent does; agents that override
+    # __init__ without forwarding it, e.g. OrchestratorAgent, opt out
+    # automatically and keep their existing system-prompt machinery).
+    import inspect as _inspect
+
+    if "prompt_builder" in _inspect.signature(agent_cls.__init__).parameters:
+        from openjarvis.prompt.builder import SystemPromptBuilder
+
+        agent_kwargs["prompt_builder"] = SystemPromptBuilder(
+            agent_template=config.agent.default_system_prompt or "",
+            memory_files_config=config.memory_files,
+            system_prompt_config=config.system_prompt,
+        )
+
     agent = agent_cls(engine, model_name, **agent_kwargs)
     ctx = AgentContext()
 
@@ -535,7 +551,11 @@ def _print_profile(
     "--agent",
     "agent_name",
     default=None,
-    help="Agent to use (simple, orchestrator).",
+    help=(
+        "Agent to use (simple, orchestrator, ...). "
+        "When omitted, falls back to ``agent.default_agent`` from config. "
+        "Pass ``--agent ''`` to force direct-to-engine mode (no agent)."
+    ),
 )
 @click.option(
     "--tools",
@@ -591,6 +611,16 @@ def ask(
     # Load config
     config = load_config()
 
+    # Honor `agent.default_agent` from config when --agent was not explicitly
+    # passed. Pass `--agent ""` to opt out and use direct-to-engine mode.
+    # Without this fallback, `[agent].default_system_prompt` and the
+    # SOUL.md / MEMORY.md / USER.md persona system are silently bypassed for
+    # the most common command (`jarvis ask "..."`).
+    if agent_name is None:
+        configured_default = (config.agent.default_agent or "").strip()
+        if configured_default:
+            agent_name = configured_default
+
     # Track whether the user explicitly set --max-tokens
     user_set_max_tokens = max_tokens is not None
 
@@ -715,8 +745,8 @@ def ask(
             model_name,
         )
 
-    # Agent mode
-    if agent_name is not None:
+    # Agent mode (treat empty-string `--agent ""` as explicit opt-out)
+    if agent_name:
         parsed_tools = resolve_tool_names(
             tool_names,
             getattr(config.tools, "enabled", None),

src/openjarvis/core/config.py

@@ -188,13 +188,34 @@ def _total_ram_gb() -> float:
         if platform.system() == "Darwin":
             raw = _run_cmd(["sysctl", "-n", "hw.memsize"])
             return round(int(raw) / (1024**3), 1) if raw else 0.0
+        if platform.system() == "Windows":
+            import ctypes
+
+            class _MemoryStatusEx(ctypes.Structure):
+                _fields_ = [
+                    ("dwLength", ctypes.c_ulong),
+                    ("dwMemoryLoad", ctypes.c_ulong),
+                    ("ullTotalPhys", ctypes.c_ulonglong),
+                    ("ullAvailPhys", ctypes.c_ulonglong),
+                    ("ullTotalPageFile", ctypes.c_ulonglong),
+                    ("ullAvailPageFile", ctypes.c_ulonglong),
+                    ("ullTotalVirtual", ctypes.c_ulonglong),
+                    ("ullAvailVirtual", ctypes.c_ulonglong),
+                    ("sullAvailExtendedVirtual", ctypes.c_ulonglong),
+                ]
+
+            stat = _MemoryStatusEx()
+            stat.dwLength = ctypes.sizeof(_MemoryStatusEx)
+            if ctypes.windll.kernel32.GlobalMemoryStatusEx(ctypes.byref(stat)):
+                return round(stat.ullTotalPhys / (1024**3), 1)
+            return 0.0
         meminfo = Path("/proc/meminfo")
         if meminfo.exists():
             for line in meminfo.read_text().splitlines():
                 if line.startswith("MemTotal"):
                     kb = int(line.split()[1])
                     return round(kb / (1024**2), 1)
-    except (OSError, ValueError):
+    except (OSError, ValueError, AttributeError):
         pass
     return 0.0
 

src/openjarvis/mcp/transport.py

@@ -88,6 +88,20 @@ class StdioTransport(MCPTransport):
             raise RuntimeError("No response from subprocess")
         return MCPResponse.from_json(response_line.strip())
 
+    def send_notification(self, request: MCPRequest) -> None:
+        """Send a JSON-RPC notification — write only, never read.
+
+        Overrides the base implementation: stdio servers do not reply
+        to notifications, so the default ``send()`` would block forever
+        on ``proc.stdout.readline()``.
+        """
+        proc = self._process
+        if proc is None or proc.stdin is None:
+            raise RuntimeError("Transport process is not running")
+        line = request.to_json() + "\n"
+        proc.stdin.write(line)
+        proc.stdin.flush()
+
     def close(self) -> None:
         """Terminate the subprocess."""
         if self._process is not None:

src/openjarvis/prompt/builder.py

@@ -86,7 +86,10 @@ class SystemPromptBuilder:
         path = Path(path_str).expanduser()
         if not path.exists():
             return ""
-        content = path.read_text()
+        # Always read as UTF-8. On Windows, ``read_text()`` falls back to the
+        # system code page (e.g. cp950 for zh-TW, cp932 for ja) and raises
+        # ``UnicodeDecodeError`` on any non-ASCII persona content.
+        content = path.read_text(encoding="utf-8")
         if len(content) <= max_chars:
             return content
         return self._truncate(content, max_chars)

tests/cli/test_ask_agent.py

@@ -212,7 +212,39 @@ class TestAskAgentOption:
         )
         assert result.exit_code != 0
 
-    def test_no_agent_uses_direct_mode(self, runner, mock_setup):
+    def test_no_agent_flag_falls_back_to_config_default_agent(
+        self, runner, mock_setup
+    ):
+        """When --agent is omitted, ``config.agent.default_agent`` is used.
+
+        The default ``JarvisConfig`` sets ``default_agent = "simple"``, so
+        ``jarvis ask "..."`` should route through SimpleAgent rather than
+        the direct-to-engine path. Without this fallback, persona settings
+        (``default_system_prompt`` and SOUL.md/MEMORY.md/USER.md) would be
+        silently bypassed.
+        """
+        result = runner.invoke(cli, ["ask", "Hello"])
+        assert result.exit_code == 0
+        assert "Hello from engine" in result.output
+
+    def test_explicit_empty_agent_opts_out_of_agent_mode(
+        self, runner, mock_setup
+    ):
+        """``--agent ""`` is the explicit opt-out: use direct-to-engine."""
+        result = runner.invoke(cli, ["ask", "--agent", "", "Hello"])
+        assert result.exit_code == 0
+        assert "Hello from engine" in result.output
+
+    def test_no_agent_with_blank_config_default_uses_direct_mode(
+        self, runner, mock_setup, monkeypatch
+    ):
+        """When config's ``default_agent`` is blank and --agent is omitted,
+        the original direct-to-engine path is preserved."""
+        from openjarvis.core.config import JarvisConfig
+
+        cfg = JarvisConfig()
+        cfg.agent.default_agent = ""
+        monkeypatch.setattr(_ask_mod, "load_config", lambda *a, **kw: cfg)
         result = runner.invoke(cli, ["ask", "Hello"])
         assert result.exit_code == 0
         assert "Hello from engine" in result.output
@@ -304,3 +336,104 @@ class TestBuildTools:
         config = JarvisConfig()
         tools = _build_tools(["calculator", "think"], config, mock_setup, "test-model")
         assert len(tools) == 2
+
+
+class TestPersonaFilesReachModel:
+    """End-to-end coverage for SOUL.md / MEMORY.md / USER.md integration.
+
+    Without these tests, the ``SystemPromptBuilder`` and the persona files
+    documented in the README are present in the codebase but never reach
+    the model — the bug this suite is meant to prevent regressing into.
+    """
+
+    def test_soul_md_content_reaches_engine_in_simple_agent(
+        self, runner, monkeypatch, tmp_path
+    ):
+        """SOUL.md content must appear in the system message sent to the engine."""
+        from openjarvis.core.config import JarvisConfig
+
+        # Write a SOUL.md with a unique sentinel string we can grep for
+        soul = tmp_path / "SOUL.md"
+        soul.write_text("PERSONA_SENTINEL_zh_jarvis", encoding="utf-8")
+        memory = tmp_path / "MEMORY.md"
+        memory.write_text("MEMORY_SENTINEL", encoding="utf-8")
+        user = tmp_path / "USER.md"
+        user.write_text("USER_SENTINEL", encoding="utf-8")
+
+        cfg = JarvisConfig()
+        cfg.memory_files.soul_path = str(soul)
+        cfg.memory_files.memory_path = str(memory)
+        cfg.memory_files.user_path = str(user)
+        cfg.agent.default_system_prompt = "BASELINE_TEMPLATE"
+        # Disable memory context injection so it doesn't add another SYSTEM
+        # message and confuse the assertion.
+        cfg.agent.context_from_memory = False
+
+        engine = _mock_engine()
+        _register_agents()
+        _register_tools()
+        with (
+            patch.object(_ask_mod, "load_config", return_value=cfg),
+            patch.object(
+                _ask_mod, "get_engine", return_value=("mock", engine)
+            ),
+            patch.object(_ask_mod, "discover_engines", return_value=[("mock", engine)]),
+            patch.object(
+                _ask_mod, "discover_models", return_value={"mock": ["test-model"]}
+            ),
+            patch.object(_ask_mod, "register_builtin_models"),
+            patch.object(_ask_mod, "merge_discovered_models"),
+        ):
+            result = runner.invoke(cli, ["ask", "--agent", "simple", "Hello"])
+
+        assert result.exit_code == 0, result.output
+        # Grab the messages passed to engine.generate
+        engine.generate.assert_called()
+        call_args = engine.generate.call_args
+        messages = (
+            call_args.args[0]
+            if call_args.args
+            else call_args.kwargs.get("messages")
+        )
+        assert messages is not None and len(messages) >= 2
+        system_messages = [m for m in messages if str(m.role).endswith("SYSTEM")]
+        assert system_messages, f"No SYSTEM message in {messages!r}"
+        joined = "\n".join(m.content for m in system_messages)
+        assert "BASELINE_TEMPLATE" in joined
+        assert "PERSONA_SENTINEL_zh_jarvis" in joined
+        assert "MEMORY_SENTINEL" in joined
+        assert "USER_SENTINEL" in joined
+
+    def test_orchestrator_keeps_its_own_system_prompt(
+        self, runner, monkeypatch, tmp_path
+    ):
+        """OrchestratorAgent's __init__ doesn't accept ``prompt_builder``;
+        the wiring must skip it silently rather than crash."""
+        from openjarvis.core.config import JarvisConfig
+
+        soul = tmp_path / "SOUL.md"
+        soul.write_text("ORCH_PERSONA_SENTINEL", encoding="utf-8")
+
+        cfg = JarvisConfig()
+        cfg.memory_files.soul_path = str(soul)
+        cfg.agent.context_from_memory = False
+
+        engine = _mock_engine()
+        _register_agents()
+        _register_tools()
+        with (
+            patch.object(_ask_mod, "load_config", return_value=cfg),
+            patch.object(
+                _ask_mod, "get_engine", return_value=("mock", engine)
+            ),
+            patch.object(_ask_mod, "discover_engines", return_value=[("mock", engine)]),
+            patch.object(
+                _ask_mod, "discover_models", return_value={"mock": ["test-model"]}
+            ),
+            patch.object(_ask_mod, "register_builtin_models"),
+            patch.object(_ask_mod, "merge_discovered_models"),
+        ):
+            result = runner.invoke(cli, ["ask", "--agent", "orchestrator", "Hello"])
+
+        # Pass condition: doesn't crash with TypeError on prompt_builder kwarg.
+        assert result.exit_code == 0, result.output

tests/cli/test_ask_e2e.py

@@ -32,6 +32,15 @@ def _mock_engine_response():
 
 def _patch_ask(monkeypatch, tmp_path, *, engine_result=None, no_engine=False):
     """Set up common mocks for ask tests."""
+    # Re-register SimpleAgent after the autouse `_clean_registries` conftest
+    # fixture clears it. ``JarvisConfig().agent.default_agent`` defaults to
+    # ``"simple"``, so ``jarvis ask "..."`` (no --agent) routes through it.
+    from openjarvis.agents.simple import SimpleAgent
+    from openjarvis.core.registry import AgentRegistry
+
+    if not AgentRegistry.contains("simple"):
+        AgentRegistry.register_value("simple", SimpleAgent)
+
     cfg = JarvisConfig()
     cfg.telemetry.db_path = str(tmp_path / "telemetry.db")
 

tests/cli/test_ask_router.py

@@ -27,8 +27,23 @@ def _mock_engine():
     return engine
 
 
+def _register_agents():
+    """Re-register agents after the conftest registry clear.
+
+    The default ``JarvisConfig().agent.default_agent`` is ``"simple"``,
+    so ``jarvis ask "..."`` (without ``--agent``) routes through SimpleAgent.
+    Without this re-registration, that path raises ``Unknown agent: simple``.
+    """
+    from openjarvis.agents.simple import SimpleAgent
+    from openjarvis.core.registry import AgentRegistry
+
+    if not AgentRegistry.contains("simple"):
+        AgentRegistry.register_value("simple", SimpleAgent)
+
+
 def _patch_engine(engine):
     """Return context managers that patch engine discovery to use our mock."""
+    _register_agents()
     return (
         mock.patch.object(
             _ask_mod,
@@ -96,6 +111,7 @@ class TestAskModelResolution:
             cfg.intelligence.temperature = 0.7
             cfg.intelligence.max_tokens = 1024
             cfg.agent.context_from_memory = False
+            cfg.agent.default_agent = ""
             result = CliRunner().invoke(cli, ["ask", "Hello"])
         assert result.exit_code == 0
 
@@ -127,5 +143,6 @@ class TestAskModelResolution:
             cfg.intelligence.temperature = 0.7
             cfg.intelligence.max_tokens = 1024
             cfg.agent.context_from_memory = False
+            cfg.agent.default_agent = ""
             result = CliRunner().invoke(cli, ["ask", "Hello"])
         assert result.exit_code == 0

tests/cli/test_cli.py

@@ -2,13 +2,52 @@
 
 from __future__ import annotations
 
+import io
+import sys
 from pathlib import Path
 from unittest import mock
 
 from click.testing import CliRunner
 
 import openjarvis
-from openjarvis.cli import cli
+from openjarvis.cli import cli, main
+
+
+class TestMainEntryPoint:
+    """Tests for the ``jarvis`` console script entry point."""
+
+    def test_windows_reconfigures_stdout_to_utf8(self) -> None:
+        """On Windows, main() must reconfigure stdout/stderr to UTF-8 so that
+        CJK characters in CLI output don't trigger UnicodeEncodeError under
+        legacy code pages (cp950, cp932, cp949)."""
+        stdout_mock = mock.MagicMock(spec=io.TextIOWrapper)
+        stderr_mock = mock.MagicMock(spec=io.TextIOWrapper)
+        with (
+            mock.patch.object(sys, "platform", "win32"),
+            mock.patch.object(sys, "stdout", stdout_mock),
+            mock.patch.object(sys, "stderr", stderr_mock),
+            mock.patch("openjarvis.cli.cli") as cli_mock,
+        ):
+            main()
+        stdout_mock.reconfigure.assert_called_once_with(
+            encoding="utf-8", errors="replace"
+        )
+        stderr_mock.reconfigure.assert_called_once_with(
+            encoding="utf-8", errors="replace"
+        )
+        cli_mock.assert_called_once()
+
+    def test_non_windows_does_not_reconfigure(self) -> None:
+        """On non-Windows platforms, stdout/stderr are left untouched."""
+        stdout_mock = mock.MagicMock(spec=io.TextIOWrapper)
+        with (
+            mock.patch.object(sys, "platform", "linux"),
+            mock.patch.object(sys, "stdout", stdout_mock),
+            mock.patch("openjarvis.cli.cli") as cli_mock,
+        ):
+            main()
+        stdout_mock.reconfigure.assert_not_called()
+        cli_mock.assert_called_once()
 
 
 class TestCLI:

tests/hardware/test_hardware_profiles.py

@@ -3,13 +3,17 @@ and engine recommendation."""
 
 from __future__ import annotations
 
+import sys
 from unittest.mock import patch
 
+import pytest
+
 from openjarvis.core.config import (
     GpuInfo,
     _detect_amd_gpu,
     _detect_apple_gpu,
     _detect_nvidia_gpu,
+    _total_ram_gb,
     recommend_engine,
 )
 
@@ -75,6 +79,31 @@ class TestDetectHardware:
         assert _detect_apple_gpu() is None
 
 
+# ---------------------------------------------------------------------------
+# RAM detection
+# ---------------------------------------------------------------------------
+
+
+class TestTotalRamGb:
+    """Tests for _total_ram_gb() across platforms."""
+
+    @pytest.mark.skipif(sys.platform != "win32", reason="Requires Windows")
+    def test_total_ram_gb_windows(self):
+        """On Windows, GlobalMemoryStatusEx must return a positive RAM value."""
+        ram = _total_ram_gb()
+        assert ram > 0, f"Expected > 0 GB on Windows, got {ram}"
+
+    @pytest.mark.skipif(sys.platform != "darwin", reason="Requires macOS")
+    def test_total_ram_gb_darwin(self):
+        ram = _total_ram_gb()
+        assert ram > 0, f"Expected > 0 GB on macOS, got {ram}"
+
+    @pytest.mark.skipif(not sys.platform.startswith("linux"), reason="Requires Linux")
+    def test_total_ram_gb_linux(self):
+        ram = _total_ram_gb()
+        assert ram > 0, f"Expected > 0 GB on Linux, got {ram}"
+
+
 # ---------------------------------------------------------------------------
 # Engine recommendation
 # ---------------------------------------------------------------------------

tests/mcp/test_transport.py

@@ -136,6 +136,54 @@ class TestStdioTransport:
         finally:
             transport.close()
 
+    def test_send_notification_does_not_read_stdout(self, tmp_path):
+        """Regression for #339: stdio servers don't reply to notifications.
+
+        The base ``MCPTransport.send_notification`` falls back to ``send()``,
+        which writes the request and then blocks on ``proc.stdout.readline()``.
+        For stdio MCP servers that never reply to a notification, that read
+        hangs forever, breaking the JSON-RPC ``notifications/initialized``
+        handshake. ``StdioTransport.send_notification`` must override that
+        behavior to be write-only.
+
+        This test spawns a subprocess that consumes stdin without ever
+        writing to stdout, then issues ``send_notification`` from a worker
+        thread. If the override is missing, the thread blocks on
+        ``readline()`` and the join timeout fires.
+        """
+        import threading
+
+        script = tmp_path / "silent_consumer.py"
+        script.write_text(
+            textwrap.dedent("""\
+            import sys
+            for _ in sys.stdin:
+                pass
+        """)
+        )
+
+        transport = StdioTransport([sys.executable, str(script)])
+        try:
+            notification = MCPRequest(method="notifications/initialized")
+            result_box: dict = {}
+
+            def call():
+                try:
+                    transport.send_notification(notification)
+                    result_box["ok"] = True
+                except Exception as exc:  # noqa: BLE001
+                    result_box["error"] = exc
+
+            worker = threading.Thread(target=call, daemon=True)
+            worker.start()
+            worker.join(timeout=2.0)
+            assert not worker.is_alive(), (
+                "send_notification blocked on stdout — override missing"
+            )
+            assert result_box.get("ok") is True, result_box
+        finally:
+            transport.close()
+
     def test_close_terminates_process(self, tmp_path):
         script = tmp_path / "sleep_server.py"
         script.write_text(

tests/telemetry/test_energy_wiring.py

@@ -88,6 +88,11 @@ def _energy_config(tmp_path, gpu_metrics=True):
     cfg.telemetry.gpu_metrics = gpu_metrics
     cfg.telemetry.energy_vendor = ""
     cfg.telemetry.db_path = str(tmp_path / "telemetry.db")
+    # These tests exercise engine-level instrumentation, not agent dispatch.
+    # `jarvis ask` (no --agent) now falls back to ``agent.default_agent``
+    # which defaults to "simple", and conftest clears the registry per test.
+    # Opt out explicitly so the CLI uses direct-engine mode here.
+    cfg.agent.default_agent = ""
     return cfg