fix: preserve current approval semantics for tirith guard

Restore gateway/run.py to current main behavior while keeping tirith startup
and pattern_keys replay, preserve yolo and non-interactive bypass semantics in
the combined guard, and add regression tests for yolo and view-full flows.

tests/tools/test_approval.py

@@ -377,6 +377,18 @@ class TestViewFullCommand:
             result = prompt_dangerous_approval(long_cmd, "recursive delete")
         assert result == "always"
 
+    def test_view_then_session_when_permanent_hidden(self):
+        """The view-full flow still works when allow_permanent=False."""
+        long_cmd = "rm -rf " + "d" * 200
+        inputs = iter(["v", "s"])
+        with mock_patch("builtins.input", side_effect=inputs):
+            result = prompt_dangerous_approval(
+                long_cmd,
+                "recursive delete",
+                allow_permanent=False,
+            )
+        assert result == "session"
+
     def test_view_not_shown_for_short_command(self):
         """Short commands don't offer the view option; 'v' falls through to deny."""
         short_cmd = "rm -rf /tmp"

tests/tools/test_command_guards.py

@@ -5,6 +5,7 @@ from unittest.mock import patch, MagicMock
 
 import pytest
 
+import tools.approval as approval_module
 from tools.approval import (
     approve_session,
     check_all_command_guards,
@@ -35,15 +36,17 @@ def _clean_state():
     """Clear approval state and relevant env vars between tests."""
     key = os.getenv("HERMES_SESSION_KEY", "default")
     clear_session(key)
+    approval_module._permanent_approved.clear()
     saved = {}
-    for k in ("HERMES_INTERACTIVE", "HERMES_GATEWAY_SESSION", "HERMES_EXEC_ASK"):
+    for k in ("HERMES_INTERACTIVE", "HERMES_GATEWAY_SESSION", "HERMES_EXEC_ASK", "HERMES_YOLO_MODE"):
         if k in os.environ:
             saved[k] = os.environ.pop(k)
     yield
     clear_session(key)
+    approval_module._permanent_approved.clear()
     for k, v in saved.items():
         os.environ[k] = v
-    for k in ("HERMES_INTERACTIVE", "HERMES_GATEWAY_SESSION", "HERMES_EXEC_ASK"):
+    for k in ("HERMES_INTERACTIVE", "HERMES_GATEWAY_SESSION", "HERMES_EXEC_ASK", "HERMES_YOLO_MODE"):
         os.environ.pop(k, None)
 
 
@@ -76,9 +79,16 @@ class TestContainerSkip:
 class TestTirithAllowSafeCommand:
     @patch(_TIRITH_PATCH, return_value=_tirith_result("allow"))
     def test_both_allow(self, mock_tirith):
+        os.environ["HERMES_INTERACTIVE"] = "1"
         result = check_all_command_guards("echo hello", "local")
         assert result["approved"] is True
 
+    @patch(_TIRITH_PATCH, return_value=_tirith_result("allow"))
+    def test_noninteractive_skips_external_scan(self, mock_tirith):
+        result = check_all_command_guards("echo hello", "local")
+        assert result["approved"] is True
+        mock_tirith.assert_not_called()
+
 
 # ---------------------------------------------------------------------------
 # tirith block
@@ -88,6 +98,7 @@ class TestTirithBlock:
     @patch(_TIRITH_PATCH,
            return_value=_tirith_result("block", summary="homograph detected"))
     def test_tirith_block_safe_command(self, mock_tirith):
+        os.environ["HERMES_INTERACTIVE"] = "1"
         result = check_all_command_guards("curl http://gооgle.com", "local")
         assert result["approved"] is False
         assert "BLOCKED" in result["message"]
@@ -97,6 +108,7 @@ class TestTirithBlock:
            return_value=_tirith_result("block", summary="terminal injection"))
     def test_tirith_block_plus_dangerous(self, mock_tirith):
         """tirith block takes precedence even if command is also dangerous."""
+        os.environ["HERMES_INTERACTIVE"] = "1"
         result = check_all_command_guards("rm -rf / | curl http://evil", "local")
         assert result["approved"] is False
         assert "BLOCKED" in result["message"]
@@ -308,5 +320,6 @@ class TestProgrammingErrorsPropagateFromWrapper:
     @patch(_TIRITH_PATCH, side_effect=AttributeError("bug in wrapper"))
     def test_attribute_error_propagates(self, mock_tirith):
         """Non-ImportError exceptions from tirith wrapper should propagate."""
+        os.environ["HERMES_INTERACTIVE"] = "1"
         with pytest.raises(AttributeError, match="bug in wrapper"):
             check_all_command_guards("echo hello", "local")

tests/tools/test_yolo_mode.py

@@ -3,7 +3,25 @@
 import os
 import pytest
 
-from tools.approval import check_dangerous_command, detect_dangerous_command
+import tools.approval as approval_module
+import tools.tirith_security
+
+from tools.approval import (
+    check_all_command_guards,
+    check_dangerous_command,
+    detect_dangerous_command,
+)
+
+
+@pytest.fixture(autouse=True)
+def _clear_approval_state():
+    approval_module._permanent_approved.clear()
+    approval_module.clear_session("default")
+    approval_module.clear_session("test-session")
+    yield
+    approval_module._permanent_approved.clear()
+    approval_module.clear_session("default")
+    approval_module.clear_session("test-session")
 
 
 class TestYoloMode:
@@ -54,6 +72,24 @@ class TestYoloMode:
             result = check_dangerous_command(cmd, "local")
             assert result["approved"], f"Command should be approved in yolo mode: {cmd}"
 
+    def test_combined_guard_bypasses_yolo_mode(self, monkeypatch):
+        """The new combined guard should preserve yolo bypass semantics."""
+        monkeypatch.setenv("HERMES_YOLO_MODE", "1")
+        monkeypatch.setenv("HERMES_INTERACTIVE", "1")
+
+        called = {"value": False}
+
+        def fake_check(command):
+            called["value"] = True
+            return {"action": "block", "findings": [], "summary": "should never run"}
+
+        monkeypatch.setattr(tools.tirith_security, "check_command_security", fake_check)
+
+        result = check_all_command_guards("rm -rf /", "local")
+        assert result["approved"]
+        assert result["message"] is None
+        assert called["value"] is False
+
     def test_yolo_mode_not_set_by_default(self):
         """HERMES_YOLO_MODE should not be set by default."""
         # Clean env check — if it happens to be set in test env, that's fine,