quint-co/quint

Health v2 · maintenance only

Adoption not part of the score

1638 stars · 143 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Quint is an executable specification language based on the Temporal Logic of Actions (TLA+), designed for modeling and verifying the behavior of systems and protocols. It ships with a CLI, REPL, simulator, and integration with the Apalache model checker, letting teams run and verify specs to catch design bugs before implementation.

Use cases

• write executable specifications for distributed systems
• verify protocol invariants before implementation
• find subtle concurrency bugs with model checking
• generate model-based tests from a system spec
• simulate system designs in a REPL
• modern alternative to TLA+ for formal methods

When to choose

• designing consensus protocols or security-critical distributed systems
• you want runnable, verifiable specs instead of static design documents
• you prefer a modern, developer-friendly syntax over raw TLA+
• you need model-based testing derived from a specification

When to avoid

• you need a general-purpose programming language to build applications
• your team has no appetite for formal specification and verification
• you only need lightweight unit or integration testing of existing code

Facets

cli-tool · maturity active

programming-language interpreter cli testing simulation programming-languages microservices developer-tools cli cross-platform specification-language tla-plus formal-verification model-checking model-based-testing apalache temporal-logic repl verification formal-methods algorithms nodejs

Member repositories

For agents

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