{"id":"bash-command-substitution","text":"Command substitution $(command) captures command stdout for use in variable assignments, conditionals, and loops. Preferred over backtick syntax. Can be nested.","truth_value":"IN","source":"repo:entries/2026/03/04/command-substitution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"bash-command-substitution","truth_value":"IN","reason":"premise"}]}}