Every premium and members-only resource for $9.99/month, as a no-commitment subscription. See the plans

PalateKit

Sign in
Menu

Request a resource

Describe the resource you are missing in one sentence. We will email you when it is published.

0 / 280

A page, a video or an image online.

Unlock PalateKit

Unlock everything

Plan

Paying means accepting our terms of sale.

Secure payment by Stripe. Receipts and invoices sent by email.

Welcome back

Sign in to install, download or save this resource. A free account is enough for free resources.

Incremental modernisation of a legacy system v1.0.0

Use this resource to plan the incremental migration of an existing system without interrupting the business

New

  • 550 downloads
  • 112 likes
  • 134 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install legacy-migration-strangler-plan

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent inventories dependencies and risks, proposes a roadmap with a rollback plan per phase, then writes a facade and characterisation tests. You get a roadmap and code templates.

Mostly picked by

Updated November 2, 2026

Card for the “Incremental modernisation of a legacy system” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

Similar resources

View all

What you get

  • SKILL.md: five-step method, from assessment to migration
  • references/strangler-fig-pattern.md: facade and gradual migration
  • references/system-assessment.md: code assessment grid

Good fit for

  • A monolith to split without service downtime
  • An outdated framework to replace in stages

Not for

    Tags

    • legacy
    • migration
    • strangler fig
    • technical debt

    About

    You say

    “Propose a plan to move the billing module out of our PHP monolith in three phases, with rollback.”

    Card for the “Incremental modernisation of a legacy system” skill

    Skill published by jeffallan under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to plan the incremental migration of an existing system without interrupting the business
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/legacy-testing.md11.6 KB
    • references/migration-strategies.md11.9 KB
    • references/refactoring-patterns.md12.3 KB
    • references/strangler-fig-pattern.md8.5 KB
    • references/system-assessment.md15.3 KB
    • SKILL.md6.3 KB

    Origin and licence

    Listed unmodified

    Author
    jeffallan
    Source
    github.com/jeffallan/claude-skills/tree/b7f220d32a0925c9bbfd24995e208e76bb74507c/skills/legacy-modernizer
    Licence
    MIT

    Notice

    « legacy-modernizer » (jeffallan, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

    User reviews

    –

    No ratings yet

    Loading reviews…

    Delete your review?

    Your rating and comment will be removed from the page.