assert-json-diff 2.0.2 compares serde_json values via a recursive folder, producing diff messages with paths. Crate-level deny(unsafe_code); no I/O, no build script. Three low-severity findings: assert_json_matches_no_panic panics on Serialize failures (contract bug); inclusive array compare is positional (doc ambiguity); Indent helper byte-space oriented. Safe to use as a dev-dependency.