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java-flexible-constructors

Use when Java 25+ constructors need validation, computed arguments, or field initialization before explicit `super(...)`/`this(...)`.

Skill by isp-insoft-gmbh

IndexedMIT
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

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Use when Java 25+ constructors need validation, computed arguments, or field initialization before explicit `super(...)`/`this(...)`.

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What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

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  • codeload.github.com · found in install command

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  • ~/.claude/skills/java-flexible-constructors

What's inside

Skill name
java-flexible-constructors
Description
Use when Java 25+ constructors need validation, computed arguments, or field initialization before explicit `super(...)`/`this(...)`.
License
MIT
Compatibility
JDK 25+
Instructions
25 lines in SKILL.md · view on GitHub

Files (2)

  • SKILL.md
  • jep-513.md · examples/

SKILL.md (first lines)

# Flexible Constructor Bodies

Use for **Flexible Constructor Bodies** work from [JEP 513](https://openjdk.org/jeps/513) when targeting JDK 25+.

## When active

- Move argument validation before `super(...)`.
- Compute superclass constructor arguments in locals.
- Assign uninitialized fields declared in the same class before `super(...)` when superclass code may observe them.

## Pitfalls

- No implicit/explicit `this` use in the prologue except allowed same-class field assignments.
- No `super` field/method access before superclass construction.
- Fields with initializers cannot be assigned in the prologue.

## Examples

Read `examples/jep-513.md` for JEP-derived snippets.

## References

- https://openjdk.org/jeps/513

From isp-insoft-gmbh/isp-insoft-ai-skills, MIT.

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Last commit (this folder)
Sep 7, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
Repository
github.com/isp-insoft-gmbh/isp-insoft-ai-skills
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

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java-flexible-constructors skill. Agent Mart. https://agentmart.dev/skills/isp-insoft-gmbh-java-flexible-constructors (last updated 2026-10-24)