Version 1.2.0

Lumen AI 1.2 deepens the tool-calling architecture introduced in 1.1, adds new LLM providers and data sources, and delivers a large batch of agent reliability and UX improvements.

New Providers & Models

• OpenRouter LLM provider integration (#1863)
• MLX (Apple Silicon) model support (#1861)
• OpenAI Responses API support (#1807)

Data Sources & Ingestion

• XArraySQLSource for natural language queries on N-dimensional scientific data (#1741, #1791)
• Kaggle dataset support in DownloadSourceControls (#1848)
• Auto catalog source discovery (#1826)
• Read tables and text directly from URLs (#1839)
• Image upload support (#1802)

Agents & Planning

• New SourceAgent for data source management (#1810)
• SQLAgent discovery mode replaced with tool calling (#1803)
• Improved Planner validation flow with clarification LLM tool (#1833)
• Simplified Planner reasoning and clarification (#1836)
• Planned context added to ChatAgent's prompt (#1847)
• ValidationAgent improvements: better context, logic, and TableListAgent interop (#1820, #1827, #1845)
• Custom clarification support (#1856)

Reports & Exports

• HTML export option for Reports (#1798)
• Cancel support for running reports (#1819)
• Explain query icon in SQL editor (#1785)
• Task previews in the UI (#1792)

UX & Interface

• Updated to use panel-material-ui (#1876)
• All new controls interface (#1805)
• Show table names in exploration tool (#1854)
• Show popout only when more than one exploration exists (#1869)
• Unified LLM message logging (#1841)
• Various minor UI polish fixes (#1837)
• Improved DocumentEditor document rendering (#1817)
• Downloaded source propagated into global context (#1858)

Tools & Vector Stores

• LLM tools can now be provided per Actor (#1808)
• Custom embedding functions in ChromaDBVectorStore (#1814)
• DuckDBVectorStore metadata property implemented (#1838)
• Document search tools added (#1813)

Bug Fixes

• Fix XArraySQLSource crashes on NetCDF files with bounds variables (#1886)
• Fix SQLAgent crash on columns absent from the source catalog (#1881)
• Fix SQLAgent crash on sources with the legacy 'any' dialect (#1879)
• Fix message format and tool handling for Google LLMs (#1877)
• Fix correctly logging tool call results (#1884)
• Ensure OpenAI LLM doesn't error when no tools provided (#1883)
• Fix report export (#1870)
• Fix max_retries leaking to bare SDK client in _run_tool_loop (#1850)
• Fix issues handling tool calls in OpenAI responses API (#1811)
• Ensure stream responses handled correctly with tool calls (#1832)
• Fix ingestion of source not showing in controls (#1853)
• Fix blocking calls (#1818)
• Fix prefilter and add tests (#1797)
• Fix provenance bug (#1796)
• Prevent error on reconnection (#1795)
• Fix TableListAgent to list one or more data sources available (#1872)
• Fix format floats (#1851)
• Fix copy icon (#1868)
• Prevent duplicate system prompts (#1860)
• Handle missing user messages in plan task history rendering (#1864)

Documentation

• Panel extensions docs (#1787)

Contributors

Many thanks to @philippjfr, @ahuang11, @hoxbro, @maximlt, @ghostiee-11, and @caioaao for their contributions to this release.