Quint
Hacker ApprovedSpecification language in Developer tools
A free formal specification language based on TLA+, praised for simple syntax, good tooling, and as a checkable layer between specs and AI-written code.
A free formal specification language based on TLA+, praised for simple syntax, good tooling, and as a checkable layer between specs and AI-written code.
10 people gave an opinion
- recommend it
- 10
- criticize it
- 0
- approval share
- 100%
Recommended in 7 of 13 months
- November 2025: not recommended
- December 2025: recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: not recommended
- September 2026: recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Why it carries the badge
- 10 people recommend itNeeds 10 or more, met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 7 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Intermediate layer for AI coding
“the concept of 'executable spec' is definitely the direction to go in the age of AI vibe coding”
Comment from 24 Mar 2026 in “Executable Specs for Reliable Systems” “I really helps to have an intermediate layer between natural language specs and code.”
Comment from 18 Oct 2026 in “An executable specification language based on temporal logic of actions (TLA)” “I'll ask it to write a formal model of the state in Quint”
Comment from 24 Jul 2026 in “Why Software Factories Fail” - Comment from 7 Apr 2026 in “Model-Based Testing for Dungeons & Dragons”
Simple syntax, easy to learn
“It has an easier syntax closer to functional programming language and doesn't require a big investment learning the syntax”
Comment from 21 May 2026 in “Intro to TLA+ for the LLM Era: Prompt Your Way to Victory” “Easier syntax to learn so you are actually collaborating instead of relying on hope.”
Comment from 19 May 2026 in “Intro to TLA+ for the LLM Era: Prompt Your Way to Victory” “It comes with simple syntax and very good developer tooling.”
Comment from 30 Sep 2026 in “What TLA+ can and can't check” Good developer tooling
“with delightful tooling based on the temporal logic of actions (TLA)”
Comment from 30 Sep 2026 in “What TLA+ can and can't check” “It comes with simple syntax and very good developer tooling.”
Comment from 30 Sep 2026 in “What TLA+ can and can't check” Strong testing and verification layer
“Make sure the specifications can’t fail by verifying them for correctness.”
Comment from 28 May 2026 in “Creusot helps you prove your Rust code is correct” “It's a strong testing layer.”
Comment from 10 Apr 2026 in “Model-Based Testing for Dungeons & Dragons”
What people recommend instead
The same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| TLA+ | 74 | 19 | 80% | 12 | 7 mo5 owners | Approved |
| QuintThis page | 10 | 0 | 100% | 7 | — | Approved |
What people said
12 of the 13 comments that mention it, newest first. Each links to the original comment.
“I really helps to have an intermediate layer between natural language specs and code.”
“It comes with simple syntax and very good developer tooling.”
“with delightful tooling based on the temporal logic of actions (TLA)”
“A lot of transaction and atomic bugs were found and fixed just by having such simple instruction alone.”
“I'll ask it to write a formal model of the state in Quint”
“Make sure the specifications can’t fail by verifying them for correctness.”
“It has an easier syntax closer to functional programming language and doesn't require a big investment learning the syntax”
“Easier syntax to learn so you are actually collaborating instead of relying on hope.”
“It's a strong testing layer.”
“It worked and proved to also be a great LLM self-checker.”
“the concept of 'executable spec' is definitely the direction to go in the age of AI vibe coding”
“it worked out much better than we imagined”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.