01 — Parser Generator
LL(k) parser generator for context-free grammars. Generates a parser and a full AST (Abstract Syntax Tree) for Java & C++ from a single grammar definition.
Model-driven application platform in Rust
Development tools based on MODELLING
A cross-platform, model-driven application platform in Rust — describe your application as a model and HiveVM runs it. The toolkit adds an LL(k) parser generator, server launchers for VSCode and NUC, a ready-to-use template for building software with coding agents.
$ git clone https://github.com/hivevm/cc
Calc.g
// LL(k) grammar — generates a parser + AST grammar Calc; expr : term (('+' | '-') term)* ; term : factor (('*' | '/') factor)* ; factor : NUMBER | '(' expr ')' ; NUMBER : [0-9]+ ('.' [0-9]+)? ; WS : [ \t\r\n]+ -> skip ;
terminal
$ hivevm-cc generate Calc.g --target java,cpp
Parsing grammar Calc.g…
✓ LL(k) analysis complete (k=2)
✓ Parser → java/CalcParser.java
✓ AST → cpp/CalcNode.hpp
→ 2 targets built in 0.4s
watching grammar for changes
Generates and builds across your stack
- Java
- C++
- Rust
- Dev Container
- VSCode
- CommonMark
Toolkit
Everything a modelling toolchain should handle
HiveVM owns the model-and-generate layer — grammars, documentation and build orchestration — so your repository stays focused on intent, not boilerplate.
02 — Manual Generator
Manual generator for collections of Markdown documents. Supports the CommonMark syntax to turn a folder of files into one coherent manual.
intro.mdrendered
config.mdrendered
draft.mdskipped
GitHub 03 — Agent Template (NUC)
A starting point for building software with coding agents inside a ready-to-use Dev Container. Work is driven by a written specification and ADRs, with AGENTS.md as the single source of truth for every agent.
Multiple targets, one model
The same grammar emits idiomatic Java and C++ — keep one source of truth and let HiveVM project it onto each language.
VSCode server launchers
Server launchers wire your generated tooling straight into VSCode, so language features light up as soon as the model changes.
Developer experience
Definitions that read like the thing they describe
Grammars, documents and specifications are plain declarative files. Describe the intent once and let HiveVM generate the parser, the manual — and let coding agents grow the project from it.
- One LL(k) grammar generates a parser and AST for both Java and C++
- Plain CommonMark files compile into a single navigable manual
- One AGENTS.md governs every coding agent, spec- and ADR-driven
grammar Calc; expr : term (('+' | '-') term)* ; term : factor (('*' | '/') factor)* ; factor : NUMBER | '(' expr ')' ; NUMBER : [0-9]+ ;
# Agent Guide Single source of truth for all coding agents. ## Start here 1. docs/SPECIFICATION.md — the specification 2. docs/adr/ — accepted ADRs are binding ## ADR rules - Create an ADR before any architecture-relevant change - Set status proposed, then stop and ask for review
# User Manual Built from a collection of **CommonMark** files. - [Getting started](./start.md) - [Configuration](./config.md) - [Grammar reference](./grammar.md)
Agentic development
A nucleus every project grows from
NUC is a starting point for building software with coding agents inside a
ready-to-use Dev Container. Work is driven by a written specification and
Architecture Decision Records — with AGENTS.md as the single
source of truth every agent reads.
Why “NUC”? In beekeeping, a nucleus colony — a NUC — is the small starter colony a full hive grows from. Same idea here: a compact, ready-made nucleus that a complete project grows out of.
agent :nuc:run
running
specread
docs/SPECIFICATION.md
decideADR
docs/adr/ · proposed → accepted
buildagent
Claude Code · Mistral Vibe · Copilot
reviewhuman
small, reviewable changes
INFO devcontainer.up image=ready
INFO agent.read AGENTS.md + SPECIFICATION.md
WARN adr.required architecture-relevant change
INFO adr.proposed 0007-... awaiting review
INFO commit.ok Implements ADR-0007
Open source
Built in the open, on GitHub
Every HiveVM tool lives in its own public repository. Read the source, file issues or build from it — the whole toolkit is open.
hivevm/cc
LL(k) parser generator for context-free grammars. Generates parser and AST for Java & C++.
Open repository
hivevm/doc
Manual generator for collections of Markdown documents. Supports the CommonMark syntax.
Open repository
hivevm/nuc
A starting point for building software with coding agents inside a ready-to-use Dev Container. Specification & ADR driven.
Open repositoryAbout the name
Why “HiveVM”
HiveVM is a cross-platform, model-driven application platform in Rust —
applications are described as models, and the platform runs them. The name captures both
halves of that idea.
Hive
A tribute to the hexagonal architecture at the platform's core. Hexagons are among the most stable, efficient structures in nature — the same property that makes the design resilient and composable. And like a hive, the system is built from many small parts working together toward one coherent whole.
VM
A virtual machine: the runtime that executes applications described as models. Just as a classic VM runs bytecode, HiveVM runs models — the model is what gets executed.
Model your next toolchain
Start from a grammar, a folder of Markdown or a project specification. HiveVM turns the model into a parser, a manual or a running application — for Java, C++ and Rust.
