jq

jq — the command-line JSON processor and its filter language for slicing, filtering, transforming, and reshaping JSON. Use when extracting fields or nested paths from JSON on the command line, filtering/select-ing arrays of objects, reshaping or building new JSON objects, emitting CSV/TSV with @csv/@tsv, getting raw unquoted strings for shell capture with jq -r, slurping (-s) and aggregating JSON (add, group_by, averages), parsing API responses, NDJSON pipelines (-c), or injecting shell values safely with --arg/--argjson/$ENV. Triggers on mentions of jq, the jq command, the jq filter language, jq -r, .foo/.[] filters, @csv/@tsv, slurp/fromjson, or "filter/transform JSON in the terminal". This is the jq CLI and filter language, NOT a generic JSON tutorial and NOT jq language bindings (jaq, gojq, PyPI jq — defer those to their own docs).