Terminal scroll-up intermittently broke for Claude sessions (most visible on
iPhone). Claude Code periodically emits alt-screen switches (?1049h/?47h/?1047h),
scrollback-erase (3J), and mouse-tracking enables for full-screen UIs, which move
xterm.js to the scrollback-less alt buffer / wipe saved lines / hijack the wheel.
Codeman stripped these but only for codex mode.
Share the strip via isAltScreenStripMode(mode) = codex || claude, applied at both
sites that were codex-only: the live PTY stream (Session._handleTerminalOutput,
incl. the chunk-boundary carry) and the /terminal buffer replay. shell stays
excluded (vim/less/htop need the alt screen); opencode unchanged.
Tests: test/claude-scrollback-strip.test.ts (8 new); codex strip tests unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
