The tree serves the layout: /layout, /tag and /col/<n>/tag

A script could not see where the panes sit or edit the tags a person
clicks in. /layout lists each column, its index, x and width in cells,
current or not, empty or full, and its panes' serials, then the active
column; /tag is the workspace tag and /col/<n>/tag a column's, read and
written as a pane tag is (one line: a newline written in is a space, and a
truncating write drops the one ending it); /index's lines end with the
pane's column; the log says newcol <n> and delcol <n>. acme serves no
column files, and the docs say so.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/ninep/events.zig b/src/ninep/events.zig
index 0e489be7..fc410d5a 100644
--- a/src/ninep/events.zig
+++ b/src/ninep/events.zig
@@ -172,6 +172,10 @@ pub fn noteError(p: *Pardes, req: Req, reply: Reply) void {
     if (req.node != pardes.filesystem.os_root and req.node & pardes.filesystem.os_node == 0 and req.node & tree.sources.archive_node == 0) {
         if (tree.Node.target(req.node)) |t| switch (t) {
             .top => |f| file = f.fileName(),
+            .col => |c| {
+                serial = "-";
+                file = std.fmt.bufPrint(&name, "col/{d}/tag", .{c.index}) catch "col";
+            },
             .pane => |pt| {
                 serial = std.fmt.bufPrint(&name, "{d}", .{pt.serial}) catch "-";
                 file = switch (pt.file) {