Explain typed logic programming concepts across Mercury, Ciao Prolog, and Logtalk.
npx skills add https://github.com/hafley66/claude-research --skill prolog-types
Please help me install this Agent Skill. Skill: prolog-types Source: https://github.com/hafley66/claude-research/tree/main/skills/prolog-types Command: npx skills add https://github.com/hafley66/claude-research --skill prolog-types
Prolog has no built-in type system; everything is a term. This Skill explains typed logic programming across Mercury, Ciao Prolog, and Logtalk, and demonstrates how type annotations, mode declarations, and determinism can improve reliability and maintainability.
Explain how to annotate a simple Prolog predicate with types and modes and show a minimal typed example.
High-intent search queries and answers about installing and using this skill.
You can add typed logic to Prolog by annotating predicates with algebraic data types, mode declarations, and determinism categories to catch errors at compile time. This approach improves reliability and maintainability across your codebase.
SWI-Prolog lacks a built-in type system, but you can apply type checking approaches using libraries like mavis, error/must_be, and plspec. Assertions and static analysis also help enforce types and improve reliability.
Mode declarations in typed Prolog define the directionality of predicate arguments, specifying whether they are input or output. Combined with algebraic data types and determinism categories, they enforce purity and catch errors at compile time.
Mercury is a purely typed logic language with native type annotations and determinism enforcement, while Logtalk provides typed logic capabilities as an extension to Prolog. Both improve safety and maintainability but differ in ecosystem integration and purity requirements.
Determinism categories specify whether a predicate will succeed exactly once, multiple times, or fail, helping catch runtime errors at compile time. Combined with typed logic and mode declarations, they ensure code purity and maintainability.
hafley66Explain Prolog text representations and conversions for SWI-Prolog.
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hafley66Compare non-Prolog logic programming languages for static analysis and constraint solving.
