huskies: merge 888

server/src/chat/commands/depends.rs

@@ -272,6 +272,49 @@ mod tests {
         );
     }
 
+    /// AC4 regression (chat path): set [1,2,3] → clear → replace [4,5].
+    /// Verifies each write is reflected in CRDT and that replace does not append.
+    #[test]
+    fn depends_set_clear_replace_regression() {
+        let tmp = tempfile::TempDir::new().unwrap();
+        crate::crdt_state::init_for_test();
+        write_story_file(
+            tmp.path(),
+            "1_backlog",
+            "9920_story_scr.md",
+            "---\nname: SCR\n---\n",
+        );
+
+        // Set to [1, 2, 3].
+        let out = depends_cmd_with_root(tmp.path(), "9920 1 2 3").unwrap();
+        assert!(out.contains("1"), "response should mention dep 1: {out}");
+        let view = crate::crdt_state::read_item("9920_story_scr").expect("CRDT must have story");
+        assert_eq!(
+            view.depends_on,
+            Some(vec![1, 2, 3]),
+            "CRDT should hold [1,2,3]: {view:?}"
+        );
+
+        // Clear.
+        let out = depends_cmd_with_root(tmp.path(), "9920").unwrap();
+        assert!(out.contains("Cleared"), "clear should confirm: {out}");
+        let view = crate::crdt_state::read_item("9920_story_scr").expect("CRDT must have story");
+        assert_eq!(
+            view.depends_on, None,
+            "CRDT should be None after clear: {view:?}"
+        );
+
+        // Replace with [4, 5] — must not append to old list.
+        let out = depends_cmd_with_root(tmp.path(), "9920 4 5").unwrap();
+        assert!(out.contains("4"), "response should mention dep 4: {out}");
+        let view = crate::crdt_state::read_item("9920_story_scr").expect("CRDT must have story");
+        assert_eq!(
+            view.depends_on,
+            Some(vec![4, 5]),
+            "CRDT should hold exactly [4,5] after replace: {view:?}"
+        );
+    }
+
     #[test]
     fn depends_finds_story_in_any_stage() {
         let tmp = tempfile::TempDir::new().unwrap();