@Rafi993 are there particular tools for linting Flow.js that you would like to see supported? I'm not familiar with Flow.js, but it seems like it's a pretty standard JS library, so normal JS code written using Flow should be analyzable by Code Climate's usual JavaScript analysis.

Yes support for flowjs is a selling point for me. Flow comes with cli tool for linting. There are also some eslint plugins to run flow ( adding that support will also do ) https://github.com/amilajack/eslint-plugin-flowtype-errors

We'd be happy to consider PRs to add plugins to our ESLint plugin.

Building new Code Climate engines wrapping Flow's linter is not a priority for us right now, sorry. I've added the "help wanted" tag to this issue: if you or somebody else wanted to write & maintain an engine wrapping that tool, we would be able to support that engine on our platform. There's a spec covering how engines work and are packaged, and some of our smaller engines make for good examples to look at for basic engine structure & packaging.