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Check - GOL Productions
golproductio · 2026-06-15 · via Show HN

Check if a command is runnable.

Prefix any command with check and get one word back. The command is either runnable or it isn't. That's it.

Command in.

Pass any command. curl, wget, httpie, python, node — anything with a network target. From your terminal, a script, a pipeline, stdin, an AI agent — anywhere a command is generated before it's executed.

Word out.

Runnable or invalid. Exit code 0 or 1. No scores, no explanations, no opinions. A fact, not an assessment.

Pipe native.

Reads from arguments or stdin. Returns an exit code. Works in bash, CI, Docker, cron, webhook chains — anywhere sh runs.