Two majors:
- The divider drag was unthrottled: every mousemove did a full xterm
reflow on BOTH panes and sent Pane B a {t:'z'} resize frame with no
unchanged-dimensions skip, fanning out into a `tmux resize-window`
child plus a SIGWINCH per event — ~50 of each dragging across half a
wide viewport. SplitTerminalPane.fit() is now split into localFit()
(reflow only) and fit() (reflow + send); the drag coalesces moves
into one localFit() per animation frame via requestAnimationFrame,
and sends the real resize for both panes exactly once, at drag end,
matching the primary pane's own throttledResize convention.
- Pane B pulled the FULL scrollback unchunked for every session mode,
writing it in one terminal.write() call. Mirrors the primary pane's
own mode check (app.js's selectSession): shell sessions get a
bounded 1MiB ?tail= fetch instead of ?full=1, and the fetched buffer
is written through a minimal chunked writer (32KB slices, yielding a
frame between each) instead of one primary-pane chunkedTerminalWrite
this simpler, independently created/destroyed pane has no equivalent
of (no session-switch generation counters or live-output gate).
Smaller items from the same review:
- Pane B now follows live appearance changes (applyTerminalSkin,
applyTerminalFontFamily, applyTerminalFontWeights, setFontSize all
propagate to it, matching the teammateTerminals pattern) and reads
the real codeman-font-size/terminalFontFamily/weights/DEFAULT_SCROLLBACK
settings at construction instead of hardcoding fontSize 14 / scrollback 5000.
- The Pane-B-promotion path now skips selectSession() when
_closingSessions already owns this delete (the user closing Pane A's
own tab), matching _onSessionDeleted's own active-session-handoff guard.
- Detaching a session AFTER a split is already open now yields the PTY
size in _sendResize() too (not just at picker-open time), mirroring
sendResize's own detachedElsewhere guard.
- .btn-split joins the body.solo-mode hide list, next to .btn-multimonitor.
- The split row was 6px wider than its container (two flex-shrink:0
50% panes plus a 6px divider): both panes are now flex-shrink 1.
- Pane B's header and the split-picker rows are marked so i18n.js's
exact-string lookup skips them, matching .session-name elsewhere —
a session literally named e.g. "Sessions" was translatable on zh-CN.
- The Split button now reflects open/closed state via a `.split-open`
accent style, aria-pressed, and a title/aria-label that says which
behaviour the next click gets.
- _splitPane.connect() is no longer an unawaited call with no .catch().
- terminal-split.js's fileoverview pointed at a doc path that was
renamed away in the previous push; @dependency now credits
constants.js for CodemanTerminalFont, not terminal-ui.js.
- index.html's Split settings chip no longer reuses data-preview-order
"12" (already the Ultracode Agents chip's slot in the same "header"
preview group).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
- Exclude popped-out (detached) sessions from the split picker:
SplitTerminalPane._sendResize() has no yield-to-detached-window check
the way the primary pane's sendResize() does, so splitting against a
detached session put its own window and Pane B in a fight over the
same PTY's dimensions. Simplest fix per the review: keep them out of
buildSplitPickerSessions() entirely.
- Show a visible dead state when Pane B's WebSocket drops. onData
already silently discards keystrokes while the socket isn't OPEN
(there is no reconnect for v1), so a dropped socket left the pane
looking normal while it quietly ate everything typed into it.
- openSplitPane() returns early with no active session, so a split
triggered from the home screen no longer creates and connects Pane B
behind the opaque welcome overlay with nothing to show for it.
- onMove() during a divider drag now bails when the split has
auto-collapsed mid-drag (the other pane's session ending) instead of
throwing on `divider.parentElement` being null.
- Promote Pane B via `selectSession(id, { auto: true })` when Pane A's
session ends — this is an app-driven selection, not the user clicking
a tab, so it must not spend the promoted session's idle alert.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
test/split-pane-auto-collapse.browser.test.ts covers "Pane B's session ends"
in a real Chromium, but that suite is excluded from the npm test CI gate.
The "Pane A's session ends, Pane B gets promoted" branch had no coverage
anywhere, and it is the one branch whose correctness depends on exact
ordering: _splitSessionId must be captured BEFORE closeSplitPane() runs
(which nulls it) or the promoted session id is lost. Loads terminal-split.js
via `vm` against a minimal fake CodemanApp (same technique as
test/session-close-fallback.test.ts), and pins all three branches (Pane A
ends, Pane B ends, unrelated session ends) plus that the original
_onSessionDeleted always still fires.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
