Persistent naming, step 1 (plan/adr/0002): faces are named from their history (a face lying on an input face keeps its name; new faces by role: F<feature>:side:<sketch curve>, :start/:top/:bottom caps, :blend:<edge>, …; split pieces #k along their spread), edges by the faces they separate (pieces ~k); names worked out lazily per body and shared by its clones; fillets and chamfers store edge names and resolve by name first (a split edge takes the piece nearest the picked point with a warning, a vanished one falls back to the point with a warning); model.faces and model.edges report names; tests for resize, suppress, reorder, an upstream split and a removed sketch segment

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/doc/src/document.rs

@@ -1015,6 +1015,9 @@ pub struct Feature {
     /// is found again when earlier edits move or resize the body.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub edge_refs: Vec<crate::EdgeRef>,
+    /// Persistent names of the picked edges (resolved first; see `naming`).
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub edge_names: Vec<String>,
     #[serde(flatten)]
     pub kind: FeatureKind,
 }
@@ -1275,7 +1278,17 @@ impl Document {
             Some(n) if !n.trim().is_empty() => n.trim().to_string(),
             _ => self.unique_name(kind.base_name()),
         };
-        let f = Feature { id, name, suppressed: false, body_names: Vec::new(), param_names: Vec::new(), component: 0, edge_refs: Vec::new(), kind };
+        let f = Feature {
+            id,
+            name,
+            suppressed: false,
+            body_names: Vec::new(),
+            param_names: Vec::new(),
+            component: 0,
+            edge_refs: Vec::new(),
+            edge_names: Vec::new(),
+            kind,
+        };
         match self.marker {
             Some(m) if m < self.features.len() => {
                 self.features.insert(m, f);