Prefix any command with check and get one word back. The command is either runnable or it isn't. That's it.
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.
Runnable or invalid. Exit code 0 or 1. No scores, no explanations, no opinions. A fact, not an assessment.
Reads from arguments or stdin. Returns an exit code. Works in bash, CI, Docker, cron, webhook chains — anywhere sh runs.
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