xterm.js still parses OSC 52 introduced by C1 OSC (\x9d) and ended by C1 ST
(\x9c). OSC52_STRIP_RE matched only the 7-bit forms, so a direct-PTY session
that emitted the C1 form re-copied old text on every replay.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
When navigator.clipboard is missing (plain HTTP, install.sh's LAN option) or
refuses the write (an unfocused window), _copyText falls back to a hidden
textarea whose select() takes focus, and removing it left focus on <body>:
the next keystrokes after Claude Code's /copy went nowhere. The handler now
restores the element focused before the copy, as Auto Copy does.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
xterm parses write() data after chunkedTerminalWrite has already cleared
_isLoadingBuffer, so the main terminal's replay gate never held: a tab switch
or reconnect re-copied the newest OSC 52 in the replayed history. Strip every
OSC 52 from the replay beside the DEC 2026 markers (OSC52_STRIP_RE). Tiles
keep their own _bufferLoading gate, which holds there.
One Claude Code copy arrives up to three times (its own OSC 52, tmux
load-buffer -w, set-clipboard forwarding), so identical text within
OSC52_DEDUPE_MS is dropped. The manual-copy fallback opens only in the
focused tab, so a background tab on the same session stays quiet.
The replay tests now drive the real chunkedTerminalWrite into
@xterm/headless and fail without the strip. Test harnesses that supply
DEC_SYNC_STRIP_RE by hand get OSC52_STRIP_RE too, and CLAUDE.md records
the rules next to Auto Copy.
Programs inside the terminal (Claude Code /copy, tmux yanks with
set-clipboard on, vim) set the clipboard with OSC 52. xterm.js registers no
handler for 52, so on a headless host (no xclip, no DISPLAY) those copies
were silently dropped and never reached the remote browser.
Register one handler on the main terminal and on every TerminalTile (split
Pane B, tile grid). It decodes the base64 payload as UTF-8 and copies it
through _copyText, falling back to the manual-copy dialog when the browser
blocks the write. Read queries (`?`) are refused, and nothing is copied
during a buffer replay, so a tab switch or reconnect never re-copies old
OSC 52 sequences.
Codeman maintainer