openleetcode - Local LeetCode runner with open test suites

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

openleetcode is a local LeetCode runner built around open test suites, made in Haskell. It takes a normal solution file, finds the matching problem manifest, builds a tiny language-specific harness, sends it to a pluggable execution backend (Piston), and judges the result locally. Tests and runtime templates live in the repo, making the CLI just glue. Supports multiple languages including Python, Rust, C++, and Java, with a Docker-based backend for easy setup. Ideal for developers who want to practice LeetCode problems offline, customize tests, or integrate with their own workflows.