improve library mode interface

[Kanahiro]

No description provided.

[codecov]

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 ⚠️

Additional details and impacted files

@@            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              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.