# Changelog

All notable changes to cargoxx will be documented in this file.

## [Unreleased]

### Added
- M0 repo skeleton: hand-written `CMakeLists.txt`, bootstrap `flake.nix`,
  empty C++23 module units for every component listed in `TECH_SPEC.md` §1
  (`util`, `exec`, `manifest`, `lockfile`, `layout`, `linkdb`, `resolver`,
  `codegen`, `cli`), root module `cargoxx`, and a stub `main.cpp` that
  builds an empty `cargoxx` binary.
- `.clang-format` (LLVM, 100-column) and `.gitignore`.
- `SPEC.md`, `TECH_SPEC.md`.
- M1 foundation in `cargoxx.util`: `ErrorCode` (numbers per `TECH_SPEC.md` §4),
  `Error`, `Result<T> = std::expected<T, Error>`, and `format(Error)` rendering
  `error[Ennnn]: ...` with optional `--> path:line:col` and `hint:` lines.
  `format` lives in `src/util/error.cpp` as a module implementation unit.
- `Catch2 v3` wired through `flake.nix` (libc++-built override) and registered
  in CMake; `tests/util_error.cpp` covers six format cases via
  `catch_discover_tests`.