checkmate

Validate runtime conditions in Java applications using a fluent API.

2|Updated Feb 18, 2026
One-click install
npx skills add https://github.com/tomitribe/claude-plugins --skill checkmate
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: checkmate
Source: https://github.com/tomitribe/claude-plugins/tree/main/plugins/checkmate/skills/checkmate
Command: npx skills add https://github.com/tomitribe/claude-plugins --skill checkmate

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Validate runtime conditions in Java applications using a fluent, expressive API.

Core Features & Use Cases

  • Fluent object checks with a builder-style API to compose multiple validations
  • Safe short-circuiting and lazy evaluation to avoid unnecessary work
  • Mapping, fallbacks, and or-throw patterns to robustly handle invalid states
  • Pluggable logging through custom CheckLogger for unified diagnostics
  • Use cases include configuration validation, deployment assertions, and CLI diagnostics

Quick Start

Create a Checks instance and define object checks to validate configuration, printing results.

Frequently Asked Questions about checkmate

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I validate runtime conditions in Java using a fluent API?

Runtime validation in Java uses a fluent API to apply configuration checks, deployment diagnostics, and CLI diagnostics, providing structured output and short-circuiting on failures to avoid unnecessary work.

What is the best way to handle invalid configuration states in Java applications?

Handling invalid configuration states in Java is best done using mapping, fallbacks, and or-throw patterns within a fluent validation API to safely robustly manage errors and short-circuit execution.

Does Java runtime validation support lazy evaluation to avoid unnecessary checks?

Java runtime validation supports safe short-circuiting and lazy evaluation, ensuring that unnecessary validation work is avoided when composing multiple object checks in a fluent builder-style API.

Can I customize logging for runtime validation checks in my Java app?

You can customize logging for runtime validation checks in Java by implementing a pluggable CheckLogger, providing unified diagnostics for configuration validation, deployment assertions, and CLI diagnostics.

When do I need runtime validation for deployment diagnostics in Java?

Runtime validation for deployment diagnostics in Java is needed when you must assert deployment conditions and validate configurations at startup, using structured output and short-circuiting to halt on failures.