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Re-query the terminal theme on focus so the tmux bar survives sleep

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Ghostty pushes the light/dark change over mode 2031, and the hooks that
act on it work for a manual toggle. But every scheduled switch this week
happened while the lid was closed, and after waking the bar was still in
the previous palette while #{client_theme} and ghostty itself had moved
on. Rather than trust the push, ask again (DSR 996) whenever the window
regains focus; ghostty answers with its current theme and tmux treats the
reply like a pushed change, so the existing hooks do the rest.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Jonny Barnes 2026-10-31 16:56:38 +00:00
commit 533bc203a8
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2 changed files with 13 additions and 2 deletions
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8
README.md
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@ -105,11 +105,15 @@ Most of this is now handled natively and needs no configuration:
The tmux status bar needs help, because its colours are set explicitly. They live
in `tmux-light.conf` and `tmux-dark.conf` — the same layout, with each colour
taken from the matching tangere palette index — and `tmux` sources one of them
from three hooks:
from four hooks:
- `client-light-theme` / `client-dark-theme` react to a change,
- `client-attached` picks the right one for a client that attaches mid-way, since
the two above only fire on a change.
the two above only fire on a change,
- `client-focus-in` re-asks the terminal for its theme (DSR 996). Ghostty's
push is lost when Auto switches while the lid is closed, so the bar would
otherwise wake up in yesterday's colours. The reply is handled exactly like
a pushed change, so the first two hooks do the rest.
Because this keys off the terminal's reported theme rather than a schedule, it
behaves identically whether the change came from Auto at sunrise/sunset or from

7
tmux
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@ -55,6 +55,13 @@ set-hook -g client-dark-theme 'source-file ~/.tmux-dark.conf'
# client attaches. Sourcing is idempotent, so the overlap is harmless.
set-hook -g client-attached 'if -F "#{==:#{client_theme},light}" "source-file ~/.tmux-light.conf" "source-file ~/.tmux-dark.conf"'
# The push from ghostty is lost when the appearance switches while the lid is
# closed, so the bar wakes up in yesterday's colours. Re-ask the terminal
# (DSR 996) whenever the window regains focus; ghostty answers with the
# current theme and tmux treats the reply exactly like a pushed change, so
# the two hooks above do the rest.
set-hook -g client-focus-in 'run-shell -b "printf \"\\033[?996n\" > #{client_tty}"'
# Default before any client has attached and reported a theme. This also
# runs on manual reload (`r` below), so check the invoking client's theme
# rather than always falling back to dark and clobbering a light session.