v2.3.0b3

New Features

• Entry-point-based plugin system — third-party packages can register custom strategies, data providers, and tools via entry_points (#175)
• Global result store with content-hashed caching and a query_results tool for the chat agent (#163)
• custom_signal() — new public API for arbitrary DataFrame-based entry/exit signals (#166)
• Multi-series charting support in the create_chart tool (#161)
• Chainlit UI improvements — conversation starters, settings panel, action buttons, rich elements (#160)
• Plotly chart persistence across session resume (#156)
• Risk metrics module — Sharpe, Sortino, VaR, CVaR, and more (#113)
• IV rank signals and volatility surface tools (#129)
• Compare results tool for side-by-side strategy comparison (#115)
• Data quality check tool with strategy-aware mode (#140)

Bug Fixes

• Fix Interval column serialization error in ResultStore Parquet writes
• Fix orphaned tool_result blocks causing API errors on session resume (#148)
• Fix spurious yfinance re-fetches from interior gap detection (#147)
• Fix NaN propagation in liquidity slippage model when volume is null
• Prevent agent from duplicating results or proactively creating charts
• CSV download is now on-demand via action button
• Fix Interval column rendering and DataFrame resume errors