spreadsheet-kit

spreadsheet-kit is the tool interaction service for agent-based spreadsheet usage.

It gives agents a safe, inspectable, token-efficient way to read, analyze, mutate, verify, and operationalize Excel workbooks without falling back to brittle UI automation.

If you want an agent to work with spreadsheets like a real system instead of a screenshot puppet, this is the stack.

What this project is

spreadsheet-kit ships a unified spreadsheet interaction layer across four surfaces:

Supported workbook modes:

• .xlsx / .xlsm — read + write
• .xls / .xlsb — discovery/read-oriented workflows only

Why agents use spreadsheet-kit

Built for tool use, not just humans

• deterministic JSON contracts
• schema and example discovery from the CLI itself
• explicit pagination and compact output modes
• machine-readable warnings and error envelopes

Safe mutation, not blind mutation

• dry-run first workflows
• stateless output modes and overwrite safety
• event-sourced session editing
• verification surfaces for proving downstream outcomes
• structural impact analysis before risky workbook changes

Spreadsheet-aware, not generic file editing

• region detection
• table and footer-aware append helpers
• template row / row band cloning
• formula-specific replace and diagnostics
• named range CRUD
• recalculation + diff + proof flows

Good agent ergonomics

• nested command groups with legacy alias compatibility
• token-efficient reads
• exact-cell inspection and layout inspection
• workflow helpers for the repetitive parts agents usually get wrong

What is new / what makes this stack different

The current surface is much stronger than a plain “read some cells” tool. Major capabilities now include:

• asp as the primary CLI with agent-spreadsheet preserved as a compatibility alias
• grouped verification via asp verify proof and asp verify diff
• preview-first workflow helpers for:
  • write append
  • write clone-template-row
  • write clone-row-band
• formula-safe batch workflows with parse-policy diagnostics
• cell/layout/export/import inspection surfaces
• named range management (write name define|update|delete)
• formula-only replacement (write formulas replace)
• event-sourced session editing with log, branch, undo/redo, fork, apply, and materialize
• SheetPort manifest lifecycle + execution for contract-driven spreadsheet automation

Install

npm (recommended for CLI)

npm i -g agent-spreadsheet
asp --help

Installs both:

• asp — primary command
• agent-spreadsheet — compatibility alias

Downloads a prebuilt native binary for your platform. No Rust toolchain required.

Cargo

# CLI
cargo install spreadsheet-kit --features recalc 

... [View full README on GitHub](https://github.com/PSU3D0/spreadsheet-mcp#readme)