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Modernize a legacy system in steps (strangler fig) v1.0.0

Use this resource to modernize an existing system by gradually replacing its components

New

  • 449 downloads
  • 101 likes
  • 104 saves

Free

Install with the CLI

In a terminal, from the folder you want:

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

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 analyzes the existing system, maps its dependencies and risks, then organizes a gradual replacement following the strangler fig pattern: infrastructure, modernized components in waves, progressive rollout and contract tests.

Mostly picked by

Updated November 2, 2026

Card for the “Modernize a legacy system in steps (strangler fig)” skill

Details

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

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What you get

  • sub-skills/1-comprehensive-legacy-system-analysis.md: analysis of the existing system
  • sub-skills/1-strangler-fig-infrastructure-setup.md: strangler fig infrastructure
  • sub-skills/2-contract-testing-implementation.md: contract tests

Good fit for

  • Your legacy application cannot be rewritten in one go
  • A critical module must be replaced without stopping the service

Not for

    Tags

    • legacy
    • modernization
    • strangler fig
    • migration

    About

    You say

    “Propose a plan to gradually replace the billing module of our legacy ERP without interruption.”

    Card for the “Modernize a legacy system in steps (strangler fig)” skill

    Skill published by dokhacgiakhoa 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 modernize an existing system by gradually replacing its components
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE2.4 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md3 KB
    • sub-skills/1-comprehensive-legacy-system-analysis.md0.6 KB
    • sub-skills/1-legacy-code-test-coverage-analysis.md0.5 KB
    • sub-skills/1-legacy-component-decommissioning.md0.6 KB
    • sub-skills/1-performance-testing-and-optimization.md0.7 KB
    • sub-skills/1-strangler-fig-infrastructure-setup.md0.6 KB
    • sub-skills/2-component-modernization-first-wave.md0.7 KB
    • sub-skills/2-contract-testing-implementation.md0.6 KB
    • sub-skills/2-dependency-and-integration-mapping.md0.6 KB
    • sub-skills/2-documentation-and-knowledge-transfer.md1.5 KB
    • sub-skills/2-progressive-rollout-and-monitoring.md0.7 KB
    • sub-skills/3-business-impact-and-risk-assessment.md0.7 KB
    • sub-skills/3-security-hardening.md0.6 KB
    • sub-skills/3-test-data-management-strategy.md0.6 KB

    Origin and licence

    Listed unmodified

    Author
    dokhacgiakhoa
    Source
    github.com/dokhacgiakhoa/agent-skills-4-vibe-coding-cli/tree/c4a059bbf7a8d6b2162071f0fbfe74053faa6d20/.agent/skills/framework-migration-legacy-modernize
    Licence
    MIT

    Notice

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

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