Jo
AI-native language to catch prompt injection at compile-time
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HN · launched Jun 5, 2026 · 10 upvotes (top 41%) · 0 views
Niche: programming languages and interpreters · 161 launches, 2 in the last 7 days ▼ -75% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- AI-native
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 161 launches in programming languages and interpreters →
Could you build this?
No Creating a novel programming language with static analysis and a type system capable of formally catching prompt injection at compile-time requires deep programming language theory and compiler research.
What it would actually take: This requires building a custom compiler frontend and type system (e.g., in Rust using LLVM or custom IR) implementing information flow control, taint analysis, and semantic constraints for non-deterministic LLM inputs. Proving safety guarantees against prompt injection at compile time is an open research problem at the intersection of static verification and AI security. It requires researchers with deep compilers, formal methods, and LLM adversarial attack experience.
Discussion
9 comments analyzed.
Competitors mentioned: API wrappers for AI agents, Database-level security (PostgreSQL RLS), Runtime sandboxes
Concerns raised: API wrappers kill flexibility and create maintenance bottlenecks, Database security disconnected from application business logic, Compile-time enforcement overstates capability - injection is runtime data, Title doesn't precisely explain what Jo is
Feature requests: Support for API-only agent design patterns
Competitors
Other products that read as similar to this one : 2513 launches clear the similarity bar, closest 8 shown.
Attention rank: #988 of 2514 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 218 days after the earliest competitor.
- ReasonGate- An explainable gate that blocks LLM prompt injection · hn · 2026-07-16 · 7 upvotes · similarity 0.63
- Promptloop · hn · 2026-05-29 · 13 upvotes · similarity 0.63
- InjectSetConsole · github · 2026-09-27 · 118 upvotes · similarity 0.59
- Crilio · hn · 2026-08-24 · 5 upvotes · similarity 0.55
- NeuralScript · hn · 2026-05-04 · 5 upvotes · similarity 0.55
- awesome-jev · github · 2026-09-18 · 75 upvotes · similarity 0.55
- prompt-poet · github · 2026-11-05 · 50 upvotes · similarity 0.54
- jev-cli · github · 2026-09-18 · 20 upvotes · similarity 0.54
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.