Kosuke vs Claude Code vs Background Agents

Hand off the boring tickets. Keep the hard engineering.

Kosuke runs your codebase in a live sandbox so PMs, designers, and marketing ship small tickets themselves. No blind diffs from background agents, just tested work you can actually merge.

Watch Video

Everyengineerknowsthefeeling.Youopenyoursprintboardandmostofitisn'tengineering.Abuttoncolor.Atooltiprewrite.Onemorefieldonthesignupform.Theticketsthateatyourdaybeforeyougettoanythingthatmatters.Kosuketakesthemoffyourplate,inalivesandboxofyourtechstack.Youreview.Youapprove.Youmerge.Backtorealengineering.

of tickets you shouldn't be touching

Not another background agent.

Hand off the bullshit tickets

Copy tweaks, feature flags, new form fields, marketing changes. The small stuff that breaks your flow every time but blocks everyone else until it ships. Let your team take it from ticket to PR. You review the diff when it lands.

A preview, not a promise

Every change spins up a live preview wired to your code, your DB, your env. Your PM sees it, tests it, iterates until it's right, then opens the PR. You review work that's already been QA'd, not a blind diff from a headless agent.

Your architecture, respected

Kosuke picks up your patterns from the repo itself. Your structure, your components, and the house rules you've documented for your team. Every change feels like your team wrote it. You're reviewing changes, not reformatting them.

Configure once. Ship forever.

Connect your repo, spin up the sandbox, set your conventions once. Every ticket after that runs inside those boundaries. Your team shipping, you reviewing only what matters.

Configure× 1

01Import repo

02Define sandbox

03Set conventions

Done

Ship∞

Update pricing copymaria/pm

Add FAQ entrysam/marketing

Fix nav hoveralex/design

Update pricing copymaria/pm

Add FAQ entrysam/marketing

Fix nav hoveralex/design

Describe

Preview

Iterate

Pull request

Merge

Engineering effort over time

CONFIG

SHIP ∞

Why not just use Claude Code?

Because your PM shouldn't need to configure a local development environment to fix a typo.

~/acme-app · zsh

$ git clone git@github.com:acme/app.git

Permission denied (publickey).

$ brew install docker postgres node@20

Installing dependencies… (4 min)

$ docker compose up

Error: port 5432 already in use

$ cp .env.example .env.local

Missing: STRIPE_KEY, GHOST_KEY, SENTRY_DSN…

$ bun run db:migrate

Schema drift detected.

$ claude code

Ready.

previews-1248.kosuke.ai

What Kosuke requires

A browser.

That's it.

No terminal. No git. No Docker. No env files. Describe what you want, preview it live, ship.

Why not just use Linear Agents or Cursor Agents?

Because a PR without a preview is useless for non-technical people.

Background agents

Stuck on review

PROJ-247Todo

Redesign pricing page with Teams tier

featureP1web

@agent

2h ago

agent.cliWorking

>Redesign pricing page with Teams tier

Read(pricing/page.tsx)

Grep("plans = [")

Edit(pricing/page.tsx)

Write(seat-slider.tsx)

Bash(bun run lint)

PR #1248Open

app/pricing/page.tsx

+ import { SeatSlider }

+ import { Matrix }

- const plans = [...pro]

+ const plans = {

+ pro, teams, ent

+ }

12 files · +247 −84

A diff isn't a preview. The PM can't tell if it's right, and the engineer becomes the bottleneck.

Kosuke

Shipped in minutes

promptBy PM

Redesign the pricing page: add a Teams tier between Pro and Enterprise, a seat-based calculator with a slider, and a comparison matrix with 12 feature rows.

preview-1248Live

Simple pricing, scale as you grow

Three plans. Cancel anytime.

Pro

$19/mo

✓ 1 project

✓ 10k requests

✓ Email support

Teams

$49/seat

✓ Unlimited

✓ SSO + roles

✓ Priority

Ent

Custom

✓ SLA + DPA

✓ Dedicated CSM

✓ On-prem

PR #1248Ready

Previewed by the PM

Tested on mobile

Approved by design

+247 −84ready to merge

Engineers review code that's already been tested. Just a clean PR, ready to merge.

Works with your favorite stack.

Frontend

10 stacks

Next.js

React

Vue

Nuxt

Svelte

SvelteKit

Angular

Astro

Remix

SolidJS

Backend

14 stacks

Node.js

Python

Express

Hono

Nest.js

Django

Flask

FastAPI

Ruby on Rails

Laravel

Spring Boot

.NET

Rust

Mobile

4 stacks

React Native

Flutter

Swift / iOS

Kotlin / Android

Data

6 stacks

PostgreSQL

Supabase

Redis

MySQL

MongoDB

SQLite

Not seeing your stack? Contact us.

Ship demos, not meetings.

When every branch is a live environment, your whole team moves faster.

Demo without engineers

Every sandbox is a shareable link. Product shows customers, Sales demos to prospects, CS walks clients through workflows. No engineer required.

Non-technical teammates ship

Hand off copy changes and config tweaks to PMs. You focus on architecture.

QA without sync

Every PR is a live preview. No more "deploy to staging" requests.

Coming Soon

The Dev Mode

The first Cloud IDE ready for the Agents Era. Run up to 5 Agents in parallel, each in its own live cloud sandbox. Share the preview link with QA, review the code, and merge when ready.

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