Developers struggle to get useful types from their code tools
Developers using static typing in Python and JavaScript run into gaps: checkers may miss or reject code, factory-created clients can remain untyped, and obvious types still require manual annotations. Some also lack a convenient way to inspect inferred types while reading code. Existing checker and editor setups can help, but may require extra dependencies or leave values imprecisely typed.
For developers adding static typing to dynamic-language codebases. Mentioned from Dec 2017 to Oct 2025 on Bluesky, GitHub and Hacker News.
6 different people described this problem in 6 separate discussions.
- Indie fit
- 5.0/10
- Pain
- 4.7/10
- Frequency
- 7.0/10
- Willingness to pay
- 0.0/10
- Momentum
- 5.0/10
- Who pays
- Professionals
- Competition
- High
- Build difficulty
- Medium
What people said
Quoted word for word. Follow a link to read the whole discussion.
We tried Pyright out, and it was indeed able to typecheck parts of the codebase which mypy refused to check due to the issue in this thread. It's certainly strange adding Node as a development dependency to our project, on the flipside
But we still have the issue that, since clients are created from factory methods, the type checker won't know what class your client is
Build brief
See what to build and who will buy it
- 2 product ideas with the smallest useful version and pricing
- 5 places to find your first customers
- 4 more quotes from people who have this problem
- Current workarounds, existing solutions and risks