fix: report missing generic CLI parameter values (#2016)

src/core/cli.rs

@@ -447,6 +447,12 @@ fn parse_function_params(
         let raw_value = args
             .get(i + 1)
             .ok_or_else(|| format!("missing value for --{key}"))?;
+        if raw_value.starts_with("--") {
+            let next_key = raw_value.trim_start_matches("--").replace('-', "_");
+            if schema.inputs.iter().any(|input| input.name == next_key) {
+                return Err(format!("missing value for --{key}"));
+            }
+        }
         let value = parse_input_value(&spec.ty, raw_value)?;
         out.insert(key, value);
         i += 2;

src/core/cli_tests.rs

@@ -52,6 +52,37 @@ fn parse_function_params_rejects_unknown_param() {
     assert!(err.contains("unknown param"));
 }
 
+#[test]
+fn parse_function_params_rejects_flag_like_missing_value() {
+    let schema = ControllerSchema {
+        namespace: "test",
+        function: "configure",
+        description: "test schema",
+        inputs: vec![
+            FieldSchema {
+                name: "enabled",
+                ty: TypeSchema::Bool,
+                required: true,
+                comment: "whether the feature is enabled",
+            },
+            FieldSchema {
+                name: "name",
+                ty: TypeSchema::String,
+                required: true,
+                comment: "feature name",
+            },
+        ],
+        outputs: vec![],
+    };
+    let args = vec![
+        "--enabled".to_string(),
+        "--name".to_string(),
+        "demo".to_string(),
+    ];
+    let err = parse_function_params(&schema, &args).expect_err("missing value should fail");
+    assert_eq!(err, "missing value for --enabled");
+}
+
 #[test]
 fn parse_input_value_rejects_invalid_bool() {
     let err =