Forall
An AI coding agent that generates machine-checkable proofs
Details
- External ID
- 48929654
- Source
- HN
- Company
- —
- Product
- Forall
- Website domain
- github.com
- Launched
- July 16, 2026
- Cohort
- —
- Upvotes
- 11
- Upvotes percentile
- 0.5764635603345281
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
We've been working on an open-source coding agent that generates code alongside machine-checkable proofs. We'd love feedback from the HN community, especially from people interested in formal verification, Lean, Dafny, or AI coding agents. Currently, only 3 langauges can be verified.
Enrichment
- Theme
- AI coding agents and developer tools
- Vertical
- Horizontal
- Function
- Agent / copilot
- Audience
- Developer
- AI stance
- AI-native
- Project type
- Commercial product
- Normalized one-liner
- ai agent for generating machine-checkable proofs
- Manually corrected
- False
Could you build this?
Partial The coding agent loop and CLI interface are straightforward, but reliably synthesizing formal specifications and machine-checkable proofs requires specialized expertise in formal verification and automated theorem proving.
What it would actually take: Requires an agentic search harness tightly integrated with interactive theorem prover language servers (Lean 4, Dafny, or Coq) and SMT solvers like Z3. The difficult piece is designing effective proof-state tree search, lemma decomposition, and automated tactic generation, which demands deep expertise in formal methods and dependent type theory.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one — 382 launches clear the similarity bar, closest 8 shown.
Attention rank: #157 of 383 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 255 days after the earliest competitor.
- frank · github · 2026-09-12 · 7 upvotes · similarity 0.50
- Checksum AI · ph · 2026-08-20 · 229 upvotes · similarity 0.48
- Stack Overflow for AI Coding Agents · hn · 2026-02-09 · 14 upvotes · similarity 0.47
- Lemmafit: Make agents prove that their code is correct · hn · 2026-03-08 · 7 upvotes · similarity 0.46
- Decipher AI: Agentic QA for the era of coding agents · yc · 2026-01-28 · 13 upvotes · similarity 0.46
- claude-mimic · github · 2026-09-13 · 9 upvotes · similarity 0.46
- Agent-to-code JIT compiler for Z3-theorem-proving agents · hn · 2025-11-13 · 6 upvotes · similarity 0.45
- OpenSpec: The Spec Framework for Coding Agents · yc · 2026-03-06 · 77 upvotes · similarity 0.44
Other launches for this product
Same idea, different domain
Nobody's really built a agent / copilot tool for Agriculture yet.