v0.1.0

First release of pi-agent-rb — a Ruby client for the pi coding agent, driving pi --mode rpc over its JSONL protocol.

Verified against pi 0.75.3.

Added

• Initial project scaffold.
• popen3 transport with JSONL framing and request correlation.
• Pluggable transport.
• Session API with typed event stream.
• Session#run single-shot helper (pi print-mode equivalent).
• Session commands: cycle_model, available_models, messages, last_assistant_text, compact, new_session, switch_session.
• Session#session_stats.
• Session forking and error mapping.
• Image attachments; follow_up uses a dedicated command.
• Extension UI protocol.

Fixed

• Session#set_model now sends provider/modelId (pi rejected the previous single model field).
• Session#set_thinking now sends the set_thinking_level command.

Install

```
gem install pi-agent-rb
```