feat: xterm.js + node-pty architecture for Claude CLI web terminal
Complete rewrite from tmux + JSONL parsing to a clean PTY-based approach. The proxy spawns Claude CLI in a pseudo-terminal via node-pty and relays terminal I/O as binary WebSocket frames to the simple-chat backend, which forwards them to the browser where xterm.js renders a full terminal. - node-pty PTY manager with 50KB replay buffer per session - Binary frame protocol with chatId multiplexing - WebSocket client with auto-reconnection and heartbeat - Directory listing and session listing for the web UI - README with setup instructions Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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