improve library mode interface

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 59.10%. Comparing base (3f04b5e) to head (ab1b5a0). Report is 8 commits behind head on main.

Files	Patch %	Lines
src/index.ts	0.00%	4 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #102 +/- ## ========================================== - Coverage 59.18% 59.10% -0.09% ========================================== Files 19 19 Lines 1453 1455 +2 Branches 95 95 ========================================== Hits 860 860 - Misses 590 592 +2 Partials 3 3 ```

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