#@teakit/sheet

Use this skill when writing code for @teakit/sheet.

A TypeScript toolkit for keyed business sheets (Record<string, readonly T[]>) — fixed period sheets, aggregation, rollup/rolldown, and transform/combine helpers. Not a linear-algebra library.

#Core Rules

1. Import with the canonical named import.
2. Do not use default imports unless this package explicitly supports them.
3. Use the canonical creation or entry API.
4. Do not generate unsupported aliases, constructors, or compatibility APIs.
5. Prefer exact inputs and explicit options when relevant.
6. Read the relevant reference file before generating code.

#Workflow

1. Identify the operation or concept.
2. Load only the relevant reference file from references/.
3. Read examples, API Reference, Agent Contract, and Agent Notes.
4. Generate code using only documented public APIs.
5. For repository changes, run relevant verification commands.

#Quick Example

import { Sheet } from "@teakit/sheet";

const forecast = Sheet.range("2024-Q2", "2025-Q1", { by: "quarter" }).fill(0);
const yearly = Sheet.rollup(forecast, { to: "year" }); // skips "-"; default sum

#Reference Selection

Read the smallest reference that answers the current task.