Address Ark0N's review on #506:
- The history pull's own `\x1bc` reset erased the "Pane B disconnected"
marker onclose wrote, painting a fresh, current-looking history while
onData kept silently dropping every keystroke on the dead socket — a
Codeman restart drops the socket while the tmux session (and so the HTTP
pull) survives, making this easy to hit. onclose now tracks the closure
via `_wsClosed` in addition to writing the marker (extracted into
`_writeDisconnectedMarker()`), and a replay re-stamps it in the pull's
`finally` block, after the live-frame flush, whichever order the close
and the pull land in.
- `_maybeLoadMoreHistory()` now stands aside for a detached session,
mirroring `_sendResize()`'s existing check and app.js's
`_maybeRefetchFullHistory()` — its own window already owns its PTY size
and scrollback.
- Wording: a non-shell CLI's history is out of scope for this pull, not
absent (codex and Claude's inline renderer do grow tmux history); the
alternate-screen skip only matters for a direct-PTY shell, since tmux
never surfaces the alt buffer to the browser xterm. CLAUDE.md points at
the invariants heading directly.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
tmux repaints a burst of output instead of scrolling it, so a shell
pane's xterm keeps about one screen of scrollback while tmux holds every
line. The primary pane goes back for it when the wheel reaches the top;
Pane B is a separate xterm that loaded history once at connect and never
again, so after a `cat` its earlier output was unreachable.
Pane B now does the same for a shell session: wheel-up at the top of the
normal screen pulls ?full=1&tail=TERMINAL_TAIL_SIZE and holds the
reader's place across the replay. The wheel listener is capture-phase
because xterm stopPropagation()s the events it consumes.
It follows the primary pane's rules from #494 and its 1.33.2 merge-time
fixes: a window holding no more rows than the pane (which covers a
downgrade), or a pane already at its `scrollback + rows` cap, is skipped
without a rewrite. That skip backs off to 60 s when the window was
truncated or the pane is full, since each ask costs the server a
whole-history capture-pane; an untruncated window keeps the 4 s cooldown.
There is no truncation banner in Pane B, so the 'tail' relabel does not
apply.
Live frames, a {t:'c'} clear included, are held with their arrival time
while the replay runs and applied in order only if they arrived after the
capture. The fetch has a 10 s deadline since it holds live output while
it runs. The tail of _loadBuffer() becomes _endBufferLoad() so the pull
shares its single-flight bookkeeping.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The maintainer's promised merge-time fixes from the final review of #453:
1. closeSplitPane() tears down a divider drag still in progress, so a split
that collapses mid-drag no longer leaves body.split-pane-resizing (the
page-wide col-resize cursor and user-select lock) set until a reload.
2. openSplitPane() re-applies the picker's own exclusions (detached session,
pid === null, no session record) for a row that went stale while the
menu sat open, refusing silently like its neighbouring gates.
3. architecture-invariants: the hard-hide of .btn-split is the
@media (max-width: 1179px) rule in styles.css, not mobile.css.
4. SplitTerminalPane.destroy() nulls onclose (and onerror) beside onopen
and onmessage.
5. Picker rows drop the data-session-id attribute nothing read.
6. The Pane-A-ends branch collapses with skipPrimaryResize, so the closing
resize is no longer aimed at the session the server just removed.
7. The {t:'r'} refresh path is single-flight across the fetch and the
chunked write, coalescing a mid-replay refresh into one trailing re-run.
Tests: split-pane-auto-collapse-unit gains the drag-teardown, exclusion and
skip-resize cases; the new split-pane-terminal-unit covers destroy() and the
refresh single-flight. All were run against the pre-fix module to confirm
they fail there.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
(cherry picked from commit dbd39aed015ae5ae5870aba398bf4b4ab5118e47)
