Guides

Use this section when you already know the basics and need concrete integration patterns.

In this section

• Workbook Edits and Batching: grouped writes, undo boundaries, and evaluation patterns.
• Custom Functions (Rust, Python, JS): callback registration semantics and runtime parity.
• WASM Plugins: Inspect, Attach, Bind: Rust plugin lifecycle with feature/runtime gating.
• LET/LAMBDA and Callables: currently implemented callable semantics and edge cases.
• Deterministic Testing: reproducible test checklist and command matrix.

Suggested reading order

1. Start with Workbook Edits and Batching.
2. Add Custom Functions (Rust, Python, JS).
3. If needed, add WASM Plugins: Inspect, Attach, Bind.
4. Lock semantics with LET/LAMBDA and Callables and Deterministic Testing.

Related

• SheetPort: treat spreadsheets as typed, deterministic functions.
• Core Concepts
• Reference