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across a Space switch (a full screen window) tmux sees the new client
focused about 0.3 s before Ghostty's front window changes, so learn paired
the client with the terminal that had focus. live, raising a full screen
window and back crossed the two pairings, and from then on every jump
raised the wrong window (old binary: 0 of 10 jumps right).
learn now waits a second before asking Ghostty, then still requires the
client to be focused. it also drops pairings of clients no longer attached,
which piled up with every closed window.
e2e step 20: Ghostty lagging behind tmux's focus, crossed pairings healing,
pruning; the old learn fails all five. live, two Ghostty windows, one full
screen: 16 of 16 jumps right, starting from crossed pairings.
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a jump (any click, a shortcut, search) activated the terminal app, which
raised whichever window was used last. now:
- the client: the named one (a status-line click), else one already on a
session holding the agent's window (several terminal windows can show
one session; it shows the agent without switching, and keeps its own
session in a session group), else any; the focused one first, then the
one used last (its last input or focus).
- Ghostty (1.3+, scriptable by terminal id, not by tty): dingger learns
which terminal holds each client when it gains focus. tmux's
client-focus-in hook runs `dingger terminal focused`, which asks Ghostty
for its focused terminal and records it in @dingger_terminal_<tty>, but
only if the client is still focused once Ghostty answered (a fast switch
must not pair the wrong terminal); a terminal holds one client, so an
older pairing with it is dropped. `focus` raises the exact terminal
(window, tab, split) through `tmux run-shell`: Apple Events from the tmux
server count as Ghostty's own, so no permission prompt. a terminal that
is gone is forgotten and the app activated, as without a pairing.
- in a hook, #{client_name} can be another client (the previous event's);
the snippet's hook uses #{hook_client}.
e2e step 20: two nested clients on one session, focused by typing focus
reports into their outer panes, a fake osascript as Ghostty, a fake open
(tests never activate a real app); it loads the snippet's own hook line.
each rule has a negative control that fails.
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