feat: improve builtin usys

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.29%. Comparing base (d4666f8) to head (f070de6). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #268 +/- ## ========================================== + Coverage 96.28% 96.29% +0.01% ========================================== Files 42 42 Lines 1479 1485 +6 ========================================== + Hits 1424 1430 +6 Misses 55 55 ```

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