A command line runs as its own command pane unless it is clicked at a shell's prompt

A middle click, an exec write or a tag word that no builtin knows was typed
into some terminal for the pane's directory, sharing whatever state that
shell was in and answering nothing, so a misspelling vanished into a shell.
Now only a line clicked at an interactive terminal's prompt is typed there.
From anywhere else it runs as a command pane: a terminal whose child is
$SHELL -c the line in the pane's directory, full emulation, which shows its
output and then exit N from the host's reaping of the child, and stays. A
finished command pane is the next command's for its directory, which runs
below what it showed after a '% line' line (acme appends to +Errors and never
clears it, util.c:213); a running one gets a second pane. Kill ends a command
pane's whole process group, the log records run and exit, exec reads back the
command pane's serial, and a line is at most 1 KB, read off the pane as the
host forks rather than carried in every spawn effect. ttyForDir's search for
a free shell is gone. The goldens of chordcut, cmdword and layout-open change
where a file's exec now opens a command pane, and ttytaken is rewritten to
exec from the terminal itself; docs/open-questions.md records the decision.

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

1 files changed, 4 insertions, 2 deletions

diff --git a/src/tty/tty.zig b/src/tty/tty.zig
index 4c1e2db7..490958ee 100644
--- a/src/tty/tty.zig
+++ b/src/tty/tty.zig
@@ -1006,13 +1006,15 @@ const Shell = struct {
                 return true;
             },
             .pty_eof => |e| if (s.gens[e.id] == e.gen) {
+                var status: ?u8 = null;
                 if (s.ptys[e.id]) |*pt| {
                     pt.reader.await(s.io) catch {}; // reader just finished; join it or its future leaks
                     _ = libc.close(pt.file.handle);
-                    host_io.retireShell(pt.pid);
+                    status = host_io.exitStatus(pt.pid, 100);
+                    if (status == null) host_io.retireShell(pt.pid);
                     s.ptys[e.id] = null;
                 }
-                core.update(.{ .eof = .{ .pane = @intCast(e.id) } });
+                core.update(.{ .eof = .{ .pane = @intCast(e.id), .status = status } });
             },
             .key_press => |key| if (s.in_paste) {
                 const bytes = pasteBytes(key);