hcc is a compiler for the HolyC language, a derivative of TempleOS HolyC. It supports both ahead-of-time (AOT) compilation to x86_64 and AArch64 assembly and just-in-time (JIT) compilation for in-memory execution. The system includes a full front-end (lexer, parser, AST, SSA-based IR), optimization passes, register allocation, and backends for x86_64 and AArch64. Additionally, it provides a REPL, a Language Server Protocol (LSP) server, an inline assembler (TempleOS-style), a disassembler, and a control-flow graph visualizer. The standard library is written in HolyC and offers data structures (lists, vectors, hash maps, red-black trees), JSON/CSV parsers, SQLite bindings, networking, threading, coroutines, and system call wrappers. The project is a self-contained, well-structured compiler toolchain with extensive tests and active development.