Show HN: Openleetcode – local LeetCode runner where tests live in the repo

Openleetcode is a local LeetCode runner built in Haskell that allows developers to run and test coding problems locally with test suites stored directly in a repository. It works by taking a solution file, matching it to a problem manifest, generating a language-specific harness, and executing it against tests using a pluggable backend (currently Piston), with installation available for Linux, macOS, and Windows via Docker.