Changelog

[0.1.0] - 2026-08-19

Features

• Add public spreadsheet API with data-source ingestion, semantic types, references, validation, styles, formulas, streaming, and direct XLSX output (#2)
• Add declarative spreadsheet blocks: title, spacer, image, chart and the stack flow container. A sheet now places its blocks sequentially without manual start_row arithmetic, explicit anchor stays available as a layout escape hatch, overlapping placed blocks are rejected during validation, and the XlsxWriter backend lowers titles, images and the supported chart kinds. (#3)
• Add grouped reports and pivot matrices with flexible aggregates, typed keys, and single-pass buffering. Enforce XLSX bounds and avoid dense sparse materialization. (#4)
• Add a format-independent template specification and a dedicated XLSX template route with named-range table targets, styled block repetition, OpenPyXL hooks, and pivot package post-processing. (#5)

Documentation

• Added a MkDocs documentation site with a Material theme and a mkdocstrings API reference, a docs dependency group, docs and docs-serve tox environments, and a GitHub Pages deployment workflow that builds with --strict. (#6)

Release notes are generated from Towncrier fragments in changelog.d/. Unreleased changes live there until a version is cut.