update

Cargo.toml

@@ -16,9 +16,16 @@ shlex             = "1.3"
 chrono            = "0.4"
 shellexpand       = "3.1"
 clap_complete     = "4.1"
+serde_json = { version = "1", optional = true }   # <-- NEW
 
 [dev-dependencies]
 assert_cmd = "2"
 predicates = "3"
 tempfile   = "3"
 dirs       = "5"        # cross-platform data dir helper
+
+[features]
+# The CLI prints JSON only when this feature is enabled.
+# Having the feature listed silences the `unexpected cfg` lint even
+# when you don’t turn it on.
+json = ["serde_json"]