A Systems Programming Language and Compiler Ecosystem
HOO is a high-performance, statically typed systems programming language and compiler ecosystem actively developed by COS Q Network.
It translates high-level object-oriented code into a pure 64-bit RISC execution model, bringing expressive language features together with hardware-fidelity execution and a clear path toward physical silicon.
HOO is built around the HVM specification: a normative 64-bit RISC execution model based on fundamental arithmetic, memory, and control-flow primitives.
The compiler performs aggressive lowering before execution, while the LLVM ORC v2 JIT acts as a high-fidelity dynamic binary translator. This keeps the runtime model explicit and minimizes abstraction overhead.
The ecosystem also includes hoort, an ARC-managed runtime library with core types such as strings, buffers, arrays, maps, tensors, exceptions, and system services.
HOO brings high-level programming features to a deliberately low-level execution model, including classes, access qualifiers, type inference, function overloading, nullable types, serializable classes, and asynchronous programming with async and await.
Its toolchain supports a REPL, local module imports, compressed .ha archives, direct source execution, and a growing set of runtime and JIT integrations.
Language design, compiler lowering, runtime behavior, and normative documentation are developed together through a specs-first workflow.
HOO is under active development across its compiler, runtime, JIT, language features, networking, and archive systems. Recent work includes tensors, buffers, async/await, networking, nullable types, and HVM 1.5 compatibility.
The project follows a comprehensive test-driven workflow, with the repository documenting a full preset verification run across more than two thousand tests.
The next major direction is a physical FPGA soft-core implementation based on the HVM specification.
License: HOO is released under the Apache License 2.0. The license permits use, reproduction, modification, distribution, and patent rights subject to its terms, including preserving required notices and providing a copy of the license. Read the full license on GitHub.
Follow the compiler, runtime, language specifications, tests, and hardware roadmap in the public HOO repository.