version: "1.0.2" name: "sheetnext-dev" description: "Develop SheetNext spreadsheet apps and integrations. Use when building or debugging SheetNext workbook, sheet, cell, formula, event, import/export, JSON workbook data, template, AI relay, drawing, table, pivot, or slicer features."

SheetNext Development

Generated from SheetNext API docs on 2026-07-10.

Use the bundled references as the source of truth. Do not invent undocumented APIs.

Tool-specific setup notes live in adapters/; they are optional and do not change the API contract.

Read Order

1. For normal spreadsheet development, read references/core-api.md.
2. For events and hooks, read references/events.md.
3. For constants and enum values, read references/enums.md.
4. For JSON import/export data shape, read references/json-format.md.
5. For built-in AI relay integration, read references/ai-relay.md.
6. For common implementation patterns, read references/recipes.md.

API Rules

• Public API is whatever appears in references/core-api.md.
• Deprecated APIs are excluded from the generated references; do not use undocumented old names.
• Internal SheetNext source members start with _ or #; avoid them unless the user is editing SheetNext internals.
• Coordinates are zero-based when using numeric objects. A1 strings such as "A1" are one-based Excel-style references.
• Prefer existing SheetNext core APIs over direct DOM access or ad hoc state mutation.
• For templates, prefer sheet.insertTemplate(...).
• For import/export, use SN.IO.
• For events, use SN.Event.

Workflow

1. Identify the target object: SN, Sheet, Cell, IO, Event, etc.
2. Search the reference docs for the exact method name and signature before coding.
3. Generate the smallest working implementation first.
4. State verification steps and any assumptions about the documented API.

Search Tips

• Method headings in core-api.md start with #### followed by the signature.
• Class headings use ## ClassName.
• Event names are grouped in events.md under ## Emitted events.
• Enum names are under ## Enum Types in enums.md.