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Software we make, and the tools we make it with.

A component library, a visual review tool and feature switches you can use today, a flaky test spotter on the way, and ThriftLoop, a home for South Africa's second-hand shops.

01 / Component library

Hack Cove UI

Available now

Our opinionated React component library, fully integrated with its themes. This site is built with it.

  • Components and themes are made together: switch the theme and the whole site changes, with no component edits.
  • No component takes a class or a style, so you compose the parts and the look stays right.
  • Three themes, Catppuccin Mocha, Catppuccin Latte and Thrifty Paper, each checked for WCAG AA contrast.
  • Whole pages for errors, not found and offline, and a loading skeleton in every component's real shape.
  • MIT licensed, on npm as @hackcove/ui-react.
The same Hack Cove UI components twice, side by side: in the light Catppuccin Latte theme and the dark Catppuccin Mocha theme.
02 / Visual review

PixelSlash

Available now

See what your change did to the page.

  • Shoots Main and Branch with Playwright, or takes PNGs you already have, and writes a report of what changed.
  • A perceptual diff tells anti-aliasing and sub-pixel noise apart from a real change.
  • Runs on your machine, for free. A shot leaves it only when you ask.
  • A review server you run holds each build for a person to accept or reject, and reports a GitHub check.
A PixelSlash review server build of Hack Cove UI: 178 changed shots to review, a progress bar with Review next and Accept all, and the first changed shots cropped to what moved, each with its theme, size and the AI judge's verdict.
03 / Feature switches

ToggleSlash

Available now

It keeps track of feature switches, so you know what turning one on will do.

  • Run it yourself: a server keeps your switches, a toggleslash command manages them, and a TypeScript SDK reads them in your app.
  • Every change to a switch goes into an audit trail.
  • Daily counts show how often each variation is served, never who received it.
  • A dashboard to switch, target and read the history of each one.
Real output, from slashslash.build
$ toggleslash flags create new-checkout --project shop
created flag new-checkout in shop
$ toggleslash flags on new-checkout --project shop --env production
flag new-checkout is on in production (version 2)
$ toggleslash flags history new-checkout --project shop
2026-11-05T14:40:10Z  toggled  flag_config new-checkout/production
2026-11-05T14:39:55Z  created  flag new-checkout
How they fit

One question each, about every change.

Software teams check the code they change. Nobody checks what customers will see. Each slash tool answers one question about a change, before it goes live.

  • Does the page look different?

    PixelSlash

    It takes a picture of every changed page before and after, and marks what moved.

  • What switches on, and for whom?

    ToggleSlash

    Every switch, who turned it on and when, and how often each variation is served.

  • Can we trust the test results?

    FlakeSlash

    It will find checks that fail and pass on the same code, so a red light means something again.

On the way

What we are building next.

  • ThriftLoop

    Coming soon

    A home for South Africa's thrift, charity and second-hand shops.