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Spoko.Studio

Spoko Upstream

Every tool you use.We quietly repaired it.

Real bugs in the packages your stack depends on — found, reproduced, fixed, merged upstream. No mocks. No workarounds. The fix lives in the code you'll `npm install` tomorrow.

143

merged pull requests

901.4K

⭐ GitHub stars

102

repositories

17.4B

↓ npm / month

Stats as of Jul 9, 2026

The runtime beneath the runtime

Node.js, HTTP, URL, encoding

We ship fixes to the plumbing that every request travels through — the URL parser Node uses, undici's HTTP/1.1 client, the cookie and range parsers that back Express, iconv-lite, structured-clone. When the plumbing leaks, thousands of downstream libraries leak with it. We patched the leaks.

  • N

    nodemailer

  • P

    path-to-regexp

  • Node.js

    undici

  • P

    pako

  • Fastify

    fast-json-stringify

  • I

    iconv-lite

  • A

    ada

  • C

    cookie

Where the data actually lives

MongoDB, Redis, TanStack DB

Data layer bugs hide in falsy-zero guards, silent overflow, and encoding edges. We fixed MongoDB's BSON encoder, Redis's COPY-with-DB-0 dropout, ioredis's PSETEX millisecond corruption, and TanStack DB's gcTime pass-through — the kind of one-line fixes that unbreak entire deployments.

  • Redis

    node-redis

  • Redis

    ioredis

  • TanStack

    db

  • MongoDB

    js-bson

  • S

    sql-escaper

The tools you spend your day in

Mantine, MUI, ESLint, Vitest, Puppeteer, Raycast

Design systems, linters, browser automation, dev-time launchpads. If it's on your dock, in your IDE, or in your CI, we've probably repaired something inside. The kind of small paper-cut fixes that make a good day at the keyboard less annoying.

  • Puppeteer

    puppeteer

  • T

    tiptap

  • Mantine

    mantine

  • C

    commander.js

  • ESLint

    eslint

  • R

    react-spectrum

  • browserslist

  • Base UI

    base-ui

Where the standards get interpreted

markdown-it, formatjs, faker, entities, sax, WPT

Parsers, encoders, formatters — the libraries that promise to implement the spec correctly. We test that promise against the spec's own oracle, submit reproducers to Web Platform Tests, then push the fix upstream so the whole ecosystem inherits the correctness.

  • Firefox Browser

    pdf.js

  • nanoid

  • C

    core-js

  • H

    highlight.js

  • Markdown

    markdown-it

  • Faker

    faker

  • formatjs

  • protobuf.js

The frameworks your product is built on

React Router, GraphQL, Solid, XState, Effect, next-intl

The routing, state, schema, and effect systems your app leans on. When these libraries have edge-case bugs, your feature ships with the bug baked in. We find them, prove them with a failing test, then send the smallest possible diff that turns the test green.

  • React Router

    react-router

  • Swiper

    swiper

  • Solid

    solid

  • XState

    xstate

  • GraphQL

    graphql-js

  • Effect

    effect

  • E

    es-toolkit

  • O

    openai-node

Brand logos are trademarks of their respective owners. Their inclusion here reflects public open-source contributions merged upstream — not endorsement.

Have a product that needs the same eye?

If your team ships software and wants engineers who treat your codebase the way we treat upstream, let's talk.