Workbook JSON schema

The workbook JSON schema v1 — the cross-surface contract shared by Rust, WASM, MCP, and the hosted API.

Stub — this page will publish the workbook JSON Schema v1 (canonical serialization per RFC 8785/JCS, required engine and version fields, authored-vs-spilled cell markers) once truecalc-workbook ships.

Dialects (Sheets vs Excel)

Behavior differences between the Google Sheets and Excel engine flavors, and why you must always pick one.

Functions

Reference pages for every TrueCalc function, generated from the engine's functions.json registry.