feat: add WorkflowContext.reset()

gateframe/core/context.py

@@ -110,6 +110,17 @@ def update(self, result: ValidationResult) -> None:
             threshold_breached=self.threshold_breached,
         )
 
+    def reset(self) -> None:
+        self.confidence = self._initial_confidence
+        self._history.clear()
+
+        logger.info(
+            "workflow_reset",
+            workflow_id=self.workflow_id,
+            confidence=self.confidence,
+            threshold_breached=self.threshold_breached,
+        )
+
     def _compute_penalty(self, result: ValidationResult) -> float:
         penalty = 0.0
         for failure in result.failures:

tests/core/test_context.py

@@ -180,6 +180,19 @@ def test_passing_step_keeps_confidence(self) -> None:
         ctx.update(_make_result(passed=True))
         assert ctx.confidence == 1.0
 
+    def test_reset_restores_initial_confidence_and_clears_history(self) -> None:
+        ctx = WorkflowContext("wf1", initial_confidence=0.8)
+        ctx.update(_make_result(passed=False, failures=[_soft_failure()]))
+        assert ctx.confidence == pytest.approx(0.65)
+        assert ctx.step_count == 1
+
+        ctx.reset()
+
+        assert ctx.confidence == pytest.approx(0.8)
+        assert ctx.step_count == 0
+        assert ctx.history == []
+        assert ctx.threshold_breached is False
+
 
 class TestStepRecord:
     def test_to_dict(self) -> None: