Accept legacy native metric dependencies

Author: nicosuave

sidemantic-rs/src/config/schema.rs

@@ -134,6 +134,8 @@ pub struct MetricConfig {
     pub agg: Option<String>,
     #[serde(default, alias = "expr", alias = "measure")]
     pub sql: Option<String>,
+    #[serde(default, rename = "metrics", skip_serializing_if = "Option::is_none")]
+    _legacy_metric_dependencies: Option<Vec<String>>,
     pub numerator: Option<String>,
     pub denominator: Option<String>,
     pub offset_window: Option<String>,
@@ -1359,6 +1361,27 @@ models:
         );
     }
 
+    #[test]
+    fn test_native_yaml_accepts_legacy_metric_dependencies() {
+        let yaml = r#"
+version: 1
+metrics:
+  - name: revenue_per_order
+    type: derived
+    sql: revenue / order_count
+    metrics:
+      - revenue
+      - order_count
+"#;
+
+        let config: SidemanticConfig = serde_yaml::from_str(yaml).unwrap();
+        let (_, metrics, _) = config.into_parts().unwrap();
+
+        assert_eq!(metrics.len(), 1);
+        assert_eq!(metrics[0].name, "revenue_per_order");
+        assert_eq!(metrics[0].sql.as_deref(), Some("revenue / order_count"));
+    }
+
     #[test]
     fn test_native_yaml_rejects_auto_dimensions_true() {
         let yaml = r#"

sidemantic/adapters/sidemantic.py

@@ -81,6 +81,7 @@
     "sql",
     "expr",
     "measure",
+    "metrics",
     "numerator",
     "denominator",
     "offset_window",

tests/adapters/sidemantic_adapter/test_parsing.py

@@ -138,6 +138,30 @@ def test_parse_native_yaml_accepts_compatibility_aliases(tmp_path):
     assert orders.metrics[1].sql == "total_revenue / order_count"
 
 
+def test_parse_native_yaml_accepts_legacy_metric_dependencies(tmp_path):
+    """Legacy exported derived metrics used `metrics` for dependency hints."""
+    adapter = SidemanticAdapter()
+    yaml_path = tmp_path / "metrics.yml"
+    yaml_path.write_text(
+        """
+version: 1
+metrics:
+  - name: revenue_per_order
+    type: derived
+    sql: total_revenue / order_count
+    metrics:
+      - total_revenue
+      - order_count
+"""
+    )
+
+    graph = adapter.parse(yaml_path)
+
+    metric = graph.metrics["revenue_per_order"]
+    assert metric.type == "derived"
+    assert metric.sql == "total_revenue / order_count"
+
+
 @pytest.mark.parametrize(
     ("yaml_body", "error_text"),
     [