# Claro RC3 Validation > Historical note: this file is kept for release history. The current package is Claro v1.18.26; use `CURRENT_STATUS.md`, `ROADMAP.md`, and the current feature docs for up-to-date beginner guidance. Validated commands: ```bash gcc -std=c99 src/claro.c -O0 -o claro -lm ./claro --version ./claro test ./claro check lessons/01_hello.claro ./claro check lessons/08_functions.claro ./claro check tests/checker_fixtures/bad_unknown_command.claro ``` Expected result: ```text Claro RC3 PASS: 0 failure(s) OK OK ``` The bad checker fixture should exit with a non-zero status and print a helpful diagnostic.