An exquisite pi browser interface

Key features

• Streaming agent chat over WebSocket — the pi SDK runs in-process
• First-party subagents — spawn independent background conversations for parallel exploration / implementation / review (subagent_spawn, with optional model override or a template's model)
• Three attachment modesinline (≤12 KB), reference (path only), lines (selected ranges) — over-limit ones degrade automatically.
• Built-in terminal (xterm.js + node-pty) with per-client PTY management
• events are pushed as snapshots (60 ms throttled) and the browser renders them.