Teach document_artifact to create embedded spreadsheet charts through a native create_chart operation, including generic line/bar/column/pie/area/scatter support and stock-style OHLC charts.
Parse CSV, TSV, and Markdown table content into real XLSX cells during spreadsheet creation so chart ranges bind to typed data instead of row text blobs.
Update the Office artifact skill and tool prompt to prefer native chart creation over Python fallback, and cover the workflow with regression tests.
Add read/edit support for Office document artifacts, including direct DOCX, XLSX, and PPTX updates with version history preservation. Inject compact active canvas metadata so agents can discover opened files without loading file contents. Move detailed usage guidance into the office-artifacts skill and keep the always-on tool prompt lean to avoid context bloat.
