1 files changed, 8 insertions, 0 deletions
diff --git a/modules/core/virtual-fs.js b/modules/core/virtual-fs.js
index 3ed1b40..3a3e119 100644
--- a/modules/core/virtual-fs.js
+++ b/modules/core/virtual-fs.js
@@ -686,6 +686,11 @@ class VirtualFileSystem {
         if (!dst || !dst.name) return false;
         const node = src.dir.content[src.name];
         if (!node) return false;
+        // mv a a is a no-op, not a delete (assign-then-delete on the same key used to erase it)
+        if (src.dir === dst.dir && src.name === dst.name) return true;
+        const existing = dst.dir.content[dst.name];
+        // Never clobber a directory node: its children would vanish with it (MAINT-010).
+        if (existing && existing.type === 'dir' && !existing._virtual) return false;
         dst.dir.content[dst.name] = node;
         delete src.dir.content[src.name];
         this.saveToStorage();
@@ -701,6 +706,9 @@ class VirtualFileSystem {
         if (!dst || !dst.name) return false;
         const node = src.dir.content[src.name];
         if (!node) return false;
+        const existing = dst.dir.content[dst.name];
+        // Never clobber a directory node: its children would vanish with it (MAINT-010).
+        if (existing && existing.type === 'dir' && !existing._virtual) return false;
         dst.dir.content[dst.name] = JSON.parse(JSON.stringify(node));
         this.saveToStorage();
         this._emitChange(dstPath);