eslint-plugin-ft-flow

ESLint plugin providing Flowtype linting rules, maintained by the flow-typed community as a fork of the original eslint-plugin-flowtype. Current version 3.0.11, with regular releases every few months. Unlike the original plugin, it is actively maintained, supports ESLint 9 flat config, and includes additional rules like `no-duplicate-type-union-intersection-members` and `sort-type-union-intersection-members`. Requires `eslint` ^8.56.0 or ^9.0.0 and optionally `hermes-eslint` >=0.15.0.