Supapower is a sync engine that keeps a local PGlite database in sync with Supabase, so an application can read and write locally and stay usable while offline. It is inspired by PowerSync.
Status: 0.1.0. Both directions of the sync work; the public API may still change before 1.0.
Documentation
Everything below, except the examples section, is for working with the monorepo. For documentation on the Supapower library see the supapower package's readme.
Packages
| Package | Description |
|---|---|
supapower |
The main package for Supapower - a PGlite extension that integrates with Supabase and syncs data between them |
Examples
| Example | Description |
|---|---|
chat |
A terminal chat app, showing a two-way sync between Supabase and PGlite |
Requirements
- Bun 1.4 or later, used as package manager, test runner and script runner
- Node.js 22 or later or a modern browser for consumers of the published packages
Getting started
bun install bun run check
bun run check runs the same four steps as continuous integration: lint, format check, typecheck and
tests.
Scripts
| Script | What it does |
|---|---|
bun run build |
Compiles every package to dist with the TypeScript compiler |
bun run typecheck |
Typechecks every package, tests included |
bun test |
Runs the test suite with the Bun test runner |
bun run test:coverage |
Runs the test suite and reports coverage |
bun run lint |
Lints with Oxlint |
bun run lint:fix |
Lints and applies the fixes Oxlint can make safely |
bun run format |
Formats the repository with Oxfmt |
bun run format:check |
Fails when a file is not formatted |
bun run changeset |
Describes a change so it can be released |
bun run clean |
Removes build output |
Toolchain
Everything is ESM and TypeScript. There is no CommonJS output and no bundler in the build.
- Bun for dependency installation, workspaces, scripts and tests
- TypeScript 7 for typechecking and for emitting JavaScript and declarations
- Oxlint and Oxfmt for linting and formatting
- Husky and lint-staged to lint and format staged files on every commit
- Changesets for versioning and publishing
License
Apache-2.0, Copyright 2026 Aboviq AB.