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0.4.0 (2026-02-28)

read_data enhanced: merge_info=true fills merged cells with values + returns merged_ranges
read_data enhanced: header_row parameter to specify which row is the header (1-based)
read_data enhanced: sheet="*" batch-reads all sheets in one call
New tool: get_formulas -- batch query all formulas in a range with optional calculated values
New tool: get_cell_styles -- batch query cell formatting (bold, colors, number format, etc.)
New tool: get_objects -- list charts, images, and shapes on a sheet
Tool count: 8 → 11

read_data() without cell_range returns sheet summary instead of full data dump
Merged cell detection in header area (first 20 rows) with range, value, and span info
Distinct table region detection via CurrentRegion probing
get_active_workbook and manage_workbooks(action="list") include per-sheet metadata (used range, rows, columns)
README updated with setup guides for 6 MCP clients (Claude Desktop, Claude Code, Roo Code, Cursor, Windsurf, Continue)

Breaking: Consolidated 17 tools into 8 for faster Claude Desktop response
workbook parameter now optional across all tools (defaults to active workbook)
get_active_workbook includes selection data (merged read_selection)
manage_workbooks: list, open, save, close, recalculate
read_data: merged read_range + read_cell_info (use detail=True)
write_data: merged write_range + set_formula (use data or formula)
manage_sheets: expanded with activate, insert/delete rows/columns
Fix FastMCP compatibility with mcp>=1.26.0 (description → instructions)
Added PyPI trusted publishing workflow