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

"There are no magic machines and no magic operators." - DHH 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, and judges the result locally. The tests live in the repo. The runtime templates live in the repo. The CLI is just the glue. $ openleetcode submit ./solution.py --id 1 $ openleetcode submit ./solution.rs --title two-sum Demo Install You need Docker for the execution backend. On Linux and macOS the installer will try to start the default Piston backend for you through Docker Compose. On Windows, the installer only installs the CLI. Bring Docker yourself and start the backend manually. Linux and macOS: curl -fsSL https://raw.githubusercontent.com/therepanic/openleetcode/main/install.sh | sh Windows PowerShell: irm https://raw.githubusercontent.com/therepanic/openleetcode/main/install.ps1 | iex Docker: curl -fsSL https://raw.githubusercontent.com/therepanic/openleetcode/main/openleetcode.yml -o openleetcode.yml curl -fsSL https://raw.githubusercontent.com/therepanic/openleetcode/main/backends/piston/docker-compose.yml -o piston.yml docker compose -f piston.yml up -d docker compose -f openleetcode.yml -f piston.yml run --rm openleetcode --version The backend may take a while to install runtimes on the first start. Backend openleetcode currently uses Piston as its execution backend. T…