Source: https://spec-kitty.ai/legacy-modernization

# Legacy modernization with AI agents

> Modernize legacy code with AI agents, one reviewable step at a time. Your experts decide what the agents know; Spec Kitty makes sure the agents build with it.

_Use case · legacy modernization_

## Modernize legacy code with AI agents, one reviewable step at a time.

The free Spec Kitty CLI turns a legacy rewrite into small, specced, reviewed steps your team can schedule. It is the free part of Spec Kitty; Brain Kitty and Team Kitty add your team's standards over MCP.

[Book a 30-minute fit call](https://spec-kitty.ai/contact?topic=fit-call) · [Try the free CLI](https://spec-kitty.ai/getting-started.md)

## What changes for legacy work

### Keep what customers rely on

Before anything changes, the CLI asks what the system does today and what must stay intact, and turns the answers into acceptance criteria.

### Technical debt you can schedule

A large modernization goal becomes ordered work packages, each small enough to review, that your team can prioritize like any other work.

### Leadership sees why it changed

When someone asks why a behavior changed, the spec, decisions and reviews are written down.

## Start with one module.

Bring the system to a 30-minute call; we'll say plainly whether Spec Kitty fits.

[Book a 30-minute fit call](https://spec-kitty.ai/contact?topic=fit-call)