1 files changed, 12 insertions, 6 deletions
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/transport.js b/packages/meshbay-hub/src/meshbay_hub/static/transport.js
index 32f8539..3acfd20 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/transport.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/transport.js
@@ -1778,13 +1778,18 @@ class MeshBayTransport {
    * free one rather than replacing anything. The ack says which, and that is what
    * this returns.
    *
-   * `root` names which shared directory to upload into — a name, never a path;
-   * the node picks the destination inside it. Since a group can have several
-   * writable roots, leaving it out is a guess, and the node's fallback ("the
-   * first writable one") exists only for MNP 1.0 clients, which had exactly one
-   * destination. Every caller here browses a root and knows which one it is.
+   * `dir` names the folder to upload into, as a virtual path
+   * (`Media/Films/1999`) — where the sender is actually looking. The node
+   * resolves it against the group's own roots, which refuses `..`, absolute
+   * segments and anything escaping its root; it is a place among the group's
+   * folders, never a path on the operator's filesystem.
+   *
+   * `root` is the older, coarser form: the root's name and nothing below it.
+   * Kept because a node that predates `dir` reads it, and because Chat has no
+   * folder on screen to name. Omitting both leaves the node to pick, which it
+   * only does for a client old enough to have had one destination.
    */
-  async uploadFile(file, { chunkSize, onProgress, signal, root } = {}) {
+  async uploadFile(file, { chunkSize, onProgress, signal, root, dir } = {}) {
     // The same file twice at once would confuse the node, which keys its own
     // upload state by name — and would race for the same destination.
     if (this._uploaders.has(file.name)) {
@@ -1836,6 +1841,7 @@ class MeshBayTransport {
           total_chunks: total,
           data: buf,
           ...(root ? { root } : {}),
+          ...(dir ? { dir } : {}),
         });
       }
       while (acked < total) {