alloy ☆

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Description:
Programming language for software modelling

Type: Cask | Latest Version: 6.2.0@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: modeling formal-methods specification analysis design

Install: brew install --cask alloy

About:
Alloy is a declarative modeling language and tool for software design. It allows users to define structures and constraints to automatically find counterexamples using a SAT solver. This helps in visualizing complex data models and detecting flaws in system designs before implementation.

Key Features:

Declarative modeling language for software design
Automatic counterexample finding via SAT solving
Integrated analyzer for visualizing models
Lightweight and focused on structural analysis

Use Cases:

Designing and validating complex data schemas
Modeling and verifying software system requirements
Finding edge cases in abstract system designs

Alternatives:

TLA+ – TLA+ focuses on temporal logic and concurrent systems, while Alloy is more focused on relational structural modeling.
Z Notation – Z is a formal specification language based on set theory, typically used with theorem provers, whereas Alloy provides automated analysis.

Version History

Detected	Version	Rev	Change	Commit
Aug 5, 2025 2:15pm	6.2.0	0	VERSION_BUMP	0e6bb8f2
Jul 9, 2024 11:34am	6.0.0	0	VERSION_BUMP	c43df330