Show HN: SheetMog – OSS Excel alternative and headless SDK

Mog is a spreadsheet engine, app runtime, and SDK stack for building workbook-aware agents, automations, and embedded spreadsheet experiences.

Try it live at mog.shortcut.ai.

pnpm typecheck

Use Mog as a librarypnpm add @mog-sdk/node

Develop Mogpnpm check:publish-readiness:fast

Use @mog-sdk/node

for headless workbook automation in Node.js and agent workflows.

pnpm add @mog-sdk/node
js
import { createWorkbook } from '@mog-sdk/node';

const wb = await createWorkbook();
const ws = wb.activeSheet;

await ws.setCell('A1', 42);
await ws.setCell('A2', '=A1*2');

console.log(await ws.getCell('A2'));
await wb.dispose();

Use @mog-sdk/embed

for browser, React, and Web Component embeds. See:

This is a large monorepo. Start with the package or surface you are changing, then run the smallest relevant verification gate.

Use dev-v0.7.2

as the exclusive development branch for this repo unless a task explicitly names another branch. Do not base new local work on dev

.

pnpm install --frozen-lockfile
pnpm typecheck
pnpm test
cargo check -p compute-core --lib --locked
cargo test -p compute-core --locked

Common package checks:

pnpm --filter @mog-sdk/node test
pnpm --filter @mog-sdk/embed test
pnpm --filter @mog-sdk/sheet-view test
pnpm check:publish-readiness:fast
pnpm check:external-fixtures

CI and non-eval publish readiness gates are documented in CI Gates.

If you are a coding agent, read AGENTS.md before editing code.

MIT. See LICENSE.