fix(split-pane): keep the disconnected marker visible, skip detached sessions

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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>

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This commit is contained in:

timkjr

2026-09-28 19:59:22 -05:00

co-authored by Claude Opus 5.5

parent 17232b01f6

commit 140ca35e2d

4 changed files with 106 additions and 8 deletions

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docs/architecture-invariants.md

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