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Follow light/dark appearance in the tmux status bar

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The status bar was five hardcoded tangere-dark colours, so in light mode the
pale #fdfdd9 text landed on a white background and became unreadable. That was
the real reason Auto appearance "never worked with the terminal setup" — ghostty
was switching correctly all along.

Split the colours into tmux-light.conf and tmux-dark.conf. The dark file is
extracted byte-exact from the previous config; the light file is the same layout
with each colour swapped for the tangere-light palette entry at the same index,
so roles are preserved (text on an accent uses the theme background, which
inverts from #1a2938 to #fdfdfa).

tmux 3.6+ learns the terminal's theme over OSC 2031, so this keys off the
appearance change itself rather than a schedule, and behaves identically whether
that came from Auto at sunrise/sunset or a manual toggle. Three hooks: the two
theme hooks react to a change, and client-attached covers a client attaching
mid-way, since those two only fire on a change. Sourcing is idempotent so the
overlap is harmless.

This replaces the dark-mode-notify launchd agent removed in 59d5622, which could
not have worked: it re-sourced .zshrc inside each shell, but the status bar
belongs to the tmux server.

Verified by round trip: flipping to Light switched #{client_theme} and applied
the light palette, and returning to Dark restored it. A running nvim does not
follow a live change (docs: the TUI sets 'background' on startup); noted in the
README.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Jonny Barnes 2026-08-09 12:38:16 +01:00
commit 6b3ab420ad
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5 changed files with 73 additions and 17 deletions
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bootstrap.sh
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@ -8,6 +8,8 @@ echo "Sym-linking the various config files"
test -L $HOME/.gitignore || ln -f -s $BASEDIR/gitignore $HOME/.gitignore
test -L $HOME/.hushlogin || ln -f -s $BASEDIR/hushlogin $HOME/.hushlogin
test -L $HOME/.tmux.conf || ln -f -s $BASEDIR/tmux $HOME/.tmux.conf
test -L $HOME/.tmux-light.conf || ln -f -s $BASEDIR/tmux-light.conf $HOME/.tmux-light.conf
test -L $HOME/.tmux-dark.conf || ln -f -s $BASEDIR/tmux-dark.conf $HOME/.tmux-dark.conf
test -d $HOME/.config/sheldon || mkdir $HOME/.config/sheldon
test -L $HOME/.config/sheldon/plugins.toml || ln -f -s $BASEDIR/sheldon.toml $HOME/.config/sheldon/plugins.toml
test -L $HOME/.zsh || ln -f -s $BASEDIR/zsh $HOME/.zsh