With no pane at all, the root look opens its file and the root exec runs its command in the session's directory

/look and /exec run at the active pane, and with every pane closed they
failed ENOENT, "file does not exist", about a file the writer never
named. Now an exec runs as the workspace tag's would, in the session's
directory: a builtin at the stand-in, a command in a command pane. An
empty window's click now runs a command line too, not only session words.
A look runs from a scratch made as New makes one, which also makes the
column. That scratch is dropped, unannounced, when the look went to
another pane, so opening a file leaves only the file.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/fs.md b/docs/fs.md
index fe78fb19..28c4fef9 100644
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -243,7 +243,9 @@ A line written to `exec` is a middle click:
   second pane. From a pane whose directory is gone nothing runs: `exec:
   <dir>: no such directory` (ENOENT).
 
-The root's `look` and `exec` act at the active pane and log as that pane's;
+The root's `look` and `exec` act at the active pane and log as that pane's
+(with no pane at all, in the session's directory: a look opens its file,
+making a column as `New` does, and an exec runs its command there);
 `/pane/<n>/look` and `exec` at pane n; `/tagexec` and `/col/<n>/exec`
 click in the workspace's or that column's tag, run commands in the session's
 directory, and log as `-`. A pane's word (`Undo`, `Msg`, `Save`) is refused