Embeddable spreadsheet engine — parse, evaluate & mutate Excel workbooks in the browser. 320+ functions, Arrow-powered.
Spreadsheet-editing skill for agentic coding hosts (Claude Code, Codex, Pi). openpyxl + formualizer + a unified CLI; works as a portable skill bundle or as a pi extension.
Embeddable spreadsheet engine — parse, evaluate & mutate Excel workbooks at native speed
Embeddable spreadsheet engine — parse, evaluate & mutate Excel workbooks from Rust
Core value, reference, and error types shared across the Formualizer parser and engine
Proc macros for authoring Formualizer built-ins (caps, schemas, and validation)
Ergonomic workbook API over the Formualizer engine (sheets, loaders, staging, undo/redo)
High-performance Arrow-backed Excel formula engine with dependency graph and incremental recalculation
High-performance Excel/OpenFormula tokenizer + parser with a stable AST surface
SheetPort runtime: bind manifests to workbooks, validate IO, and run sessions deterministically
Formula parser adapter for the xlstream streaming Excel evaluator
Stateful MCP server for spreadsheet analysis and editing — token-efficient tools for LLM agents to read, profile, edit, and recalculate .xlsx workbooks
Streaming Excel formula evaluation engine — evaluate .xlsx formulas in bounded memory
Stateless spreadsheet CLI for AI agents — read, profile, edit, and diff .xlsx workbooks from the command line
SheetPort spec schema + validation tooling