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Visitor pattern for discriminated unions v1.0.0

Use this resource to replace a discriminated union used in several switches with classes and a visitor

New

  • 355 downloads
  • 243 likes
  • 127 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install visitor-pattern-discriminated-unions

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 creates an abstract base class, frozen subclasses and a visitor interface, then updates the consuming sites. It notes when not to apply the pattern, for example for a union with two variants.

Mostly picked by

Updated November 2, 2026

Card for the “Visitor pattern for discriminated unions” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
Apache-2.0

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What you get

  • SKILL.md: four-part structure and consumption rules
  • SKILL.md: cases where not to use the pattern and repository examples

Good fit for

  • A union of commands is switched on in three places
  • You want adding a variant to fail compilation

Not for

    Tags

    • visitor
    • union
    • typescript
    • classes
    • compilation

    About

    You say

    “Turn the union of IR node types into classes with a visitor.”

    Card for the “Visitor pattern for discriminated unions” skill

    Skill published by prisma under the Apache-2.0 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 replace a discriminated union used in several switches with classes and a visitor
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE11.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md3.4 KB

    Origin and licence

    Listed unmodified

    Author
    prisma
    Source
    github.com/prisma/orm/tree/1143e9310013a10c8d7f8a100491e844545320c2/skills-contrib/ast-visitor-pattern
    Licence
    Apache-2.0

    Notice

    « ast-visitor-pattern » (prisma, Apache-2.0) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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