feat: disable unified_exec on windows

codex-rs/core/src/config/mod.rs

@@ -2537,11 +2537,19 @@ profile = "project"
         )?;
 
         assert!(config.features.enabled(Feature::ApplyPatchFreeform));
-        assert!(config.features.enabled(Feature::UnifiedExec));
+        if cfg!(target_os = "windows") {
+            assert!(!config.features.enabled(Feature::UnifiedExec));
+        } else {
+            assert!(config.features.enabled(Feature::UnifiedExec));
+        }
 
         assert!(config.include_apply_patch_tool);
 
-        assert!(config.use_experimental_unified_exec_tool);
+        if cfg!(target_os = "windows") {
+            assert!(!config.use_experimental_unified_exec_tool);
+        } else {
+            assert!(config.use_experimental_unified_exec_tool);
+        }
 
         Ok(())
     }

codex-rs/core/src/features.rs

@@ -182,6 +182,9 @@ impl Features {
     }
 
     pub fn enable(&mut self, f: Feature) -> &mut Self {
+        if cfg!(target_os = "windows") && f == Feature::UnifiedExec {
+            return self;
+        }
         self.enabled.insert(f);
         self
     }