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, 7 insertions, 0 deletions

diff --git a/src/panes.zig b/src/panes.zig
index 09b93aa3..a7f7f69f 100644
--- a/src/panes.zig
+++ b/src/panes.zig
@@ -102,6 +102,13 @@ pub const Pane = struct {
     /// middle click, a pty/run): its first word, which Kill matches, and
     /// the shell's command count its start (C mark) reaches.
     sent_command: ?struct { word: [64]u8 = undefined, len: u8 = 0, seq: u32 = 0 } = null,
+    /// A command pane (exec.zig runCommand): the line its child runs as
+    /// `$SHELL -c`, owned, where an interactive terminal has null.
+    command: ?[]u8 = null,
+    /// The command's child has exited, and with what status (null: unknown,
+    /// shown `exit ?`).
+    command_done: bool = false,
+    command_status: ?u8 = null,
     /// The revision an Exit or a Restore last warned this pane was modified
     /// at, and which of them: only that word goes ahead on the warning
     /// (builtins.zig warnModified).