A terminal's Tty word names its shell, Tty+fish, and a click on it opens another

A terminal's tag said Tty whatever shell it ran. The host's acknowledgement
of the shell it forked now sets the word to Tty+<shell>, tinted like the tag's
name. Word+arg is taken as Word arg, one word a tag can hold and a click can
take whole (+ is a word character), so Tty+fish opens a terminal on fish, as
Tty fish does; Tty takes the shell as its argument, which the host forks for
that pane instead of the configured one. Every snapshot whose screen shows a
terminal's tag changes: 69 goldens, re-recorded by name, whose 297 changed
lines are all Tty becoming Tty+bash (the harness runs bash), the cursor
columns and style spans that moved with it, or that text cut at a pane's
width.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/docs/tags.md b/docs/tags.md
index 810ae010..2f68bc0d 100644
--- a/docs/tags.md
+++ b/docs/tags.md
@@ -6,6 +6,11 @@ pane (or its first pane when focus comes from another column). This makes
 `New`, `Tty`, `Find`, and `Grep` available beside the work they act on.
 `New` appears only in the column tag by default; pane tags keep their own
 save, terminal, close, and collapse commands. `Tty` opens a new embedded terminal.
+In a terminal's own tag the word names the shell it runs, `Tty+fish`, tinted
+with the tag's name colour: `Word+arg` is one word a tag can hold for
+`Word arg`, so clicking it opens another terminal on that shell, as `Tty
+fish` would. A command pane's tag reads `<dir> (<line>) running` or `exit N`
+and offers `Kill`.
 Pane and column command text leave a small gap after their aligned drag grips.
 GUI pane mode symbols are centered by their visible ink; changing the font or
 its size refreshes the cached measurements.