Under Validation

Compile Complex OpenAPI Schemas into 100% Compliant GBNF Grammars.

A standalone, rust-powered CLI compiler that flattens OpenAPI specifications and translates nested refs, cyclical dependencies, and format constraints into local GBNF grammars or regex engines.

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Concept validation only. No payment, no commitment, no recurring newsletter.

Decision brief Validating

Why do schema-converters fail with local LLMs?

Integrating local reasoning models (llama.cpp, Ollama, vLLM) into structured JSON workflows requires GBNF context grammars. However, standard converters frequently crash or emit syntax errors when faced with complex enterprise schemas involving nested $refs, anyOf polymorphism, or cyclic structures. GBNF Schema Compiler handles these complex transformations natively, optimizing the output for edge devices.

Best fit: Full-stack and AI developers building offline or private structured-data agentic tools using local LLMs.
Not for: Developers working exclusively with closed-cloud LLMs (like OpenAI/Anthropic) that handle structured schemas server-side.
Current status: Concept validation; no production build yet

Local-first directionPortable outputsBuilt around a specific workflowEarly access is free

Proposed workflow

Robust structured LLM execution.

We believe that structured outputs shouldn't require complex, fragile API retries or post-generation validation loops.

Cyclic & Ref Resolution

Natively resolves deep $refs, cyclic models, and JSON-schema formats, emitting valid, un-bugged context trees.

Optimized Regex Generation

Flattens arbitrary constraints, string lengths, and float values into lightweight, deterministic regex state machines.

Local Rust Compiler CLI

Written in Rust for instantaneous compilations on-device. Your schema structures and endpoint shapes stay completely private.

The honest status

This is a product decision, not a finished product.

The concept is being validated before development time is committed. Joining tells us the problem is relevant to you and gives you first access if the evidence supports a build.

You will not be charged.
Your email is only used for this experiment.
You can leave the list at any time.

Before you decide

Questions, answered clearly.

The current scope, privacy model, and next step without launch-day promises.

Does it support Ollama and vLLM?

Yes. GBNF Schema Compiler outputs standard GBNF grammars (for llama.cpp/Ollama) and outlines-compatible regex strings (for vLLM/Llama.cpp context structures).

Can it compile full OpenAPI definitions?

Yes. You can point the compiler to a full OpenAPI YAML/JSON document, specify the target path/endpoint, and it isolates and flattens only the relevant payload schemas.

Does this guarantee the intended outcome?

No. The concept should state its limits clearly and preserve human review wherever judgment is required.

What happens when I request access?

Your email is recorded for this experiment only. You receive one relevant update or beta invitation if the concept moves forward.

Early access

Ready to compile robust structured LLM workflows?

Request early beta access and lock in the €49 lifetime license (50% off standard launch price).