Adds lib/builtin/claude/src/tmux_session.dart with helpers for the
clide-socket tmux server: killSession, listClideSessions,
reapSecondaries, killAllForRepo. The runner is overrideable via a
TmuxRunner typedef so tests don't shell out for real.
Wires ClaudePane.dispose() to call killSession(sessionName) for
secondary panes. Primary panes are left alone — D-41 keeps the
primary's tmux session alive across clide restarts so the next
launch re-attaches via `tmux new-session -A`.
Imports the helpers in the Claude extension as groundwork for the
app-shutdown reap and the existing claude.kill-all-sessions
command — wiring those uses lands separately.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude
1c424f26e7