A terminal's new directory is a rename in the log, and its ctl counts its body

The log said new N / and later del N <cwd> for a terminal, with no rename
in between, though a terminal is named by its directory. setCwd now logs
the rename once the pane has been announced. A terminal's ctl line gave
body length 0 while its body reads its history; it now counts that
history (without keeping a copy).

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

1 files changed, 2 insertions, 1 deletions

diff --git a/docs/fs.md b/docs/fs.md
index fee34941..714a8d2c 100644
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -294,7 +294,8 @@ entries carry no sizes, and neither does `/screen`, which has no length until
 an open renders its frame; stat the entry.
 
 `/log` is one ring (64 KiB) that records whether or not anyone reads it:
-`new`, `del`, `rename` and `save <serial> <name>`, and `msg <serial|-> <text>`
+`new`, `del`, `rename` (a terminal's too, as its shell changes directory,
+since a terminal is named by its directory) and `save <serial> <name>`, and `msg <serial|-> <text>`
 for every line the editor says, repeats included (with `verbose` on, that
 includes each builtin announcing itself as it runs). A `msg` said while a
 pane is being made can precede that pane's `new`; panes present at boot are