Close Session was bound to Ctrl+W by default. Ctrl+W is delete-word in
every shell, readline prompt and agent CLI, so muscle memory killed the
session (its tmux pane and CLI, with no confirm) mid-sentence, and with
the split pane open it was not even the pane being typed in.
Close Session now has no default key: the capture-phase handler lets
Ctrl+W through and xterm sends ^W to whichever pane is focused. The
action stays in the registry and can be bound in App Settings ->
Shortcuts; the shortcut overlay shows it as not bound. The Help modal,
CLAUDE.md, the split and tile-grid specs and three wiki pages stop
advertising Ctrl+W as kill. Owner decision (tile-grid decision 5).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
CLAUDE.md, architecture-invariants#split-pane-sessions and the split-pane
spec described Pane B as having no reconnect, seq-less input and xterm's
own Ctrl+V. Updated for TerminalTile (terminal-tile.js, load order 7.4):
reconnect and stop codes, the input-socket map and which input is kept
out of the persisted queue, image paste, the geometry rules, and
_focusedPane() with its Ctrl+W exception. The tile-grid spec now records
PR 1 as built (no key handler factory; scheduleLoad and scrollback move
to PR 2 with their first user).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
- buildSplitPickerSessions() now excludes any session with pid === null
(exited CLI, tripped PTY-exit breaker, a restore that never re-attached).
Pane B has no equivalent of selectSession()'s auto re-attach POST, so a
split opened onto one had nothing reading its tmux pane: no terminal
events ever arrived and Session.write() silently dropped every keystroke
with no ack either way, while the socket itself reported healthy.
- Fixed the hollow chord regression test: the synthetic keydowns carried no
keyCode, which is what xterm's evaluateKeyboardEvent switches on to
produce a data frame at all, so the assertion held regardless of whether
the gate fired. Adding real keyCodes surfaced a second, real bug in the
Alt+B case: the event bubbles to app.js's own document-level shortcut
dispatcher, which really toggles the sidebar and resets the layout
attribute the gate reads before Pane B's own (later, non-capture) handler
ever sees it — fixed by driving the app's real settings cache instead of
only the DOM attribute.
- Ported the two remaining primary-pane gates with real consequences:
Ctrl+Z (SIGTSTP) is swallowed for every non-shell session, matching
terminal-ui.js's reasoning (an Ink/TUI agent loop stops dead with no
visible output otherwise), and Shift/Ctrl+Enter now POSTs to
/api/sessions/:id/send-key for THIS pane's own session instead of
letting xterm send a bare \r, which used to submit an incomplete prompt
instead of inserting a newline. Smart-copy Ctrl+C is re-implemented
against Pane B's own terminal (copying app.copyTerminalSelection() would
have copied Pane A's selection instead).
- Updated docs/architecture-invariants.md and docs/split-pane-sessions-plan.md
to match, and added CLAUDE.md's missing .split-picker-menu z-index entry.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
CLAUDE.md previously only mentioned split-pane in the load-order list,
with nothing in the Architecture/frontend prose the way every other
feature gets, and its own module count was one stale (34, should have
been bumped to 35 when terminal-split.js was added). Add a short
pointer-style paragraph next to the other terminal features, fix the
count.
docs/wiki/The-Dashboard.md's header button table and
docs/wiki/Settings-Reference.md's header chips list are the two
user-facing surfaces that never mention Split at all; added both, plus
a note that the feature is desktop-only regardless of the setting.
docs/split-pane-sessions-plan.md: recorded the one design note that
isn't a code change — the global capture-phase shortcut handler always
resolves against Pane A, so Ctrl+L/Ctrl+W typed into Pane B affects the
other session. Not fixed for v1, same reasoning as the rest of the
"deliberately plainer" section.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Per Ark0N's review on PR #453: rename the design spec to
docs/split-pane-sessions-plan.md, matching every other feature's
*-plan.md convention, and drop the 957-line implementation task plan
(docs/superpowers/plans/2026-09-15-split-pane-sessions.md) — workflow
scaffolding for the subagent-driven-development run, not repo
documentation. Fixes the now-dangling link in architecture-invariants.md.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Codeman maintainer