style: update code format

- Updated build and run commands to accept a --target option for specifying target platforms.
- Enhanced documentation to include cross-compilation usage and supported targets.
- Modified configuration to allow target-specific settings and toolchains.
- Introduced a new test command to run project tests with specified profiles and targets.
- Improved handling of target directories and output structure for different platforms.
- Added support for multiple targets in the configuration file.
- Implemented inheritance for workspace and dependencies based on target and profile.

AGENT.md

@@ -0,0 +1,126 @@
+# AGENT.md
+
+## Project Overview
+
+**DCR (Dexoron Cargo Realization)** — CLI-утилита для управления C/C++/ASM проектами в стиле Cargo.
+
+- **Язык реализации**: Rust (edition 2024)
+- **Лицензия**: MIT
+- **Репозиторий**: [github.com/dexoron/dcr](https://github.com/dexoron/dcr)
+
+## Architecture
+
+### Source Tree (`src/`)
+
+```
+src/
+├── main.rs          # Точка входа, маршрутизация CLI-команд
+├── config.rs        # Глобальные константы: профили сборки, шаблон main.c
+├── cli/             # Реализация CLI-команд
+│   ├── new.rs       # dcr new <name>
+│   ├── init.rs      # dcr init
+│   ├── build.rs     # dcr build [--debug|--release]
+│   ├── run.rs       # dcr run [--debug|--release]
+│   ├── clean.rs     # dcr clean [--all]
+│   ├── help.rs      # dcr --help
+│   └── flag_update.rs  # dcr --update (self-update через GitHub Releases)
+├── core/            # Бизнес-логика
+│   ├── config.rs    # Парсинг/валидация/форматирование dcr.toml (struct Config)
+│   ├── deps.rs      # Разрешение path-зависимостей, генерация dcr.lock
+│   ├── runner.rs    # Запуск скомпилированного бинарника
+│   ├── workspace.rs # Поддержка [workspace] и упорядочивание сборки
+│   └── builder/     # Бэкенды компиляторов/ассемблеров
+│       ├── mod.rs   # Общий интерфейс сборки
+│       ├── gcc.rs   # GCC backend
+│       ├── clang.rs # Clang backend
+│       ├── msvc.rs  # MSVC backend
+│       ├── nasm.rs  # NASM backend (ASM)
+│       └── gas.rs   # GAS backend (ASM)
+├── platform/        # Платформенно-зависимая логика
+│   ├── mod.rs       # Общий интерфейс платформ
+│   ├── linux.rs
+│   ├── macos.rs
+│   └── windows.rs
+└── utils/           # Вспомогательные утилиты
+    ├── fs.rs        # Работа с файловой системой
+    ├── log.rs       # Логирование (error, warn)
+    └── text.rs      # Форматирование текста / цвета
+```
+
+### Key Concepts
+
+- **`dcr.toml`** — конфигурационный файл проекта (аналог `Cargo.toml`). Секции: `[package]`, `[build]`, `[toolchain]`, `[dependencies]`, `[workspace]`.
+- **Профили сборки**: `debug` (по умолчанию) и `release`. Встроенные флаги зависят от компилятора. Пользовательские флаги через `build.cflags` / `build.ldflags`.
+- **Инкрементальная сборка**: объектные файлы кешируются по mtime. Отслеживание заголовков пока не реализовано (см. `TODO.md`).
+- **Workspace**: корневой `dcr.toml` с секцией `[workspace]` описывает member-проекты и их зависимости; сборка происходит в топологическом порядке.
+- **Path dependencies**: зависимости по путям автоматически добавляют include/lib-пути; генерируется `dcr.lock`.
+- **Build kinds**: `bin` (бинарник), `staticlib` (`.a`), `sharedlib` (`.so`/`.dylib`/`.dll`).
+
+## Supported Platforms
+
+| Platform | Target triple |
+|---|---|
+| Linux | `x86_64-unknown-linux-gnu` |
+| macOS Intel | `x86_64-apple-darwin` |
+| macOS ARM | `aarch64-apple-darwin` |
+| Windows | `x86_64-pc-windows-msvc` |
+
+## Dependencies (Cargo)
+
+| Crate | Purpose |
+|---|---|
+| `reqwest` | HTTP-запросы для `--update` (blocking, rustls-tls) |
+| `serde` | Сериализация/десериализация |
+| `toml` | Парсинг `dcr.toml` |
+| `sha2` | Хеширование при обновлении |
+| `self-replace` | Замена бинарника при `--update` |
+
+## Development
+
+### Build & Run
+
+```bash
+cargo build             # debug build
+cargo build --release   # release build
+cargo run -- new hello  # создать проект "hello"
+```
+
+### Code Quality
+
+```bash
+cargo fmt --all
+cargo clippy --all-targets --all-features -- -D warnings
+cargo check
+cargo test
+```
+
+### CI/CD
+
+- **CI**: `.github/workflows/ci.yml` — проверки при PR/push
+- **Release**: `.github/workflows/release.yml` — сборка бинарников при пуше тега `v*`
+
+### Tests
+
+- Интеграционные CLI-тесты: `tests/cli_basic.rs`
+
+## Code Conventions
+
+- Rust stable edition 2024
+- Форматирование: `cargo fmt`
+- Линтинг: `cargo clippy` без warnings
+- Функции — маленькие и сфокусированные
+- Имена — понятные и описательные
+- Пользовательские сообщения CLI — на английском языке
+- Вывод ошибок/предупреждений через `utils::log::{error, warn}`
+
+## TODO
+
+- В файле `TODO.md`
+
+## Useful Links
+
+- Документация проекта: `docs/`
+- Changelog: `CHANGELOG.md`
+- Contributing: `CONTRIBUTING.md`
+- FAQ: `FAQ.md`
+- Установка: `install.sh` (Linux/macOS), `install.ps1` (Windows)

CHANGELOG.md

@@ -1,11 +1,123 @@
 # Changelog
 
-## [0.2.3] - 2026-02-21
+## [0.5.0] - 2026-04-10
+
 Added:
+
+- Full inheritance system for all config sections: `build`, `toolchain`, `run`, `workspace`, `dependencies`
+  - Order: `section.target.profile` → `section.profile.target` → `section.target` → `section.profile` → `section`
+  - `inherit = false` to disable inheritance completely
+  - Target-specific overrides: `[build.linux]`, `[toolchain.windows]`, `[run.macos]`, etc.
+- Cross-compilation support with `--target <triple>`
+  - Full target triples and short names (`linux`, `macos`, `windows`)
+  - Target-specific config sections: `[build.<target>]`, `[toolchain.<target>]`, `[run.<target>]`
+- Workspace and dependencies support target/profile inheritance
+- Multiple targets build: `[build.targets]` to build for multiple targets simultaneously
+- Target directory structure: `target/<target>/<profile>/` (native or triple)
+- Updated documentation with cross-compilation guide and Arch Linux examples
+
+## [0.4.0] - 2026-04-10
+
+Added:
+
+- Test command: `dcr test` and `dcr tests`
+  - Automatic compilation and linking for tests without manual configuration
+  - `dcr test --init` creates test template and header
+  - Test framework with EXPECT/SKIP macros in `dcr_test.h`
+- Improved test integration: added test CLI module and basic test suite
+- Documentation updates for testing functionality
+
+## [0.3.0] - 2026-03-18
+
+Added:
+
+- `dcr gen` command for IDE integration and build tool support
+    - `dcr gen project-info`: Output project metadata as JSON
+    - `dcr gen compile-commands`: Generate `compile_commands.json` for clangd and clang-tidy
+    - `dcr gen vscode`: Generate VS Code `.vscode/` integration (launch.json, tasks.json, settings.json)
+    - `dcr gen clion`: Generate JetBrains CLion `.idea/` integration (run configurations, build targets)
+- Full workspace support for all `gen` subcommands
+
+## [0.2.10] - 2026-03-16
+
+Added:
+
+- `build.steps` for pre-build generators (e.g., `moc`/`uic`/`rcc`)
+- `build.pkg_config` for `pkg-config`-driven cflags/ldflags resolution
+- `[toolchain]` support for `uic`, `moc`, `rcc`
+- Step command variables (`{uic}`, `{moc}`, `{rcc}`, `{cflags}`, `{stem}`, `{in}`, `{out}`)
+- `{profile}` placeholder support for dependency paths
+
+## [0.2.9] - 2026-03-14
+
+Added:
+
+- Header dependency tracking for fine-grained incremental builds (rebuilds when `#include` files change)
+- Complete internal rewrite of the builder module: merged duplicate compilation backends
+
+Changed:
+
+- `cflags` and `default_flags` no longer incorrectly leak to the linker stage in GCC/Clang
+- Reduced builder codebase size by over 20% while increasing reliability
+- Greatly expanded test suite with 34 new tests covering configuration, CLI errors, and path operations
+
+## [0.2.8] - 2026-03-06
+
+Added:
+
+- Workspace support (`[workspace]` with deps ordering)
+- `clean --all` for workspace members
+  Changed:
+- Project root discovery for `build/run/clean` (searches parent dirs)
+- Workspace paths are excluded from root source scan
+- Build output now uses a Cargo-style `Compiling <name> v<version>` line
+- Build time now reports total time for the whole build stage (workspace included)
+- Cache hits are silent (no compile line when nothing is rebuilt)
+- Safer build cache: fingerprints include headers and resolved library files
+
+## [0.2.7] - 2026-03-03
+
+Added:
+
+- Toolchain overrides via `[toolchain]` and env (`DCR_*`)
+- ASM `.S` preprocessing via GCC/Clang (`-x assembler-with-cpp`)
+
+## [0.2.6] - 2026-03-01
+
+Added:
+
+- `sharedlib` build kind (shared library output)
+- ASM projects (`build.language = "asm"`)
+- NASM and GAS backends
+- `build.platform` architecture hint for `-march` / `/arch`
+- Basic CLI integration tests
+
+## [0.2.5] - 2026-02-26
+
+Added:
+
+- Incremental builds (object caching by mtime)
+- `build.kind` with `staticlib` support
+- Custom output directory via `build.target`
+
+## [0.2.4] - 2026-02-22
+
+Added:
+
+- Custom build flags: `build.cflags` and `build.ldflags`
+- Recursive source discovery inside `src/`
+- Path dependencies with auto include/lib resolution and `dcr.lock` generation (experimental)
+- Add docs/index.md and docs/dcr-toml.md
+
+## [0.2.3] - 2026-02-21
+
+Added:
+
 - Modular builders for `gcc`, `clang`, `msvc`
 - Platform-specific binary path generation (Linux/macOS/Windows)
 
 Changed:
+
 - Build configuration moved to `[build]` (`language`, `standard`, `compiler`)
 - `dcr.toml` formatting now includes the `[build]` section
 - Build uses built-in `debug/release` flags per compiler
@@ -13,20 +125,26 @@ Changed:
 - Updated `dcr.toml` examples in documentation
 
 ## [0.2.2] - 2026-02-20
+
 Changed:
+
 - Reworked `dcr.toml` handling: added read, validation, and edit through `core::config`
 - `new` and `init` use the new config creation logic
 - `build` and `run` now require `dcr.toml` and read `compiler` and `name` from it
 
 ## [0.2.1] - 2026-02-18
+
 Changed:
+
 - Translated user-facing CLI messages to English
 - Unified error and warning output via `utils::log::{error, warn}`
 - Updated `--help` output: translated headers and examples to English, used `printc`, and applied `BOLD_*` styles
 - Translated installer script messages in `install.sh` and `install.ps1` to English
 
 ## [0.2.0] - 2026-02-17
+
 Changed:
+
 - Project migrated from Python to Rust
 - CLI and commands (`new`, `init`, `build`, `run`, `clean`, `--help`, `--version`, `--update`) ported to Rust
 - Updated `--update` flag: added support for GNU/Linux, Windows, macOS
@@ -35,31 +153,40 @@ Changed:
 - Updated `install.sh` for GNU/Linux and macOS
 
 Added:
+
 - Added `install.ps1` for Windows
 - Support for GNU/Linux, Windows, macOS (x86_64/arm)
 
 Important:
+
 - Code was ported with neural networks; future versions will include bug fixes and logic changes
 
 ## [0.1.2] - 2026-02-12
+
 Added:
+
 - Update command
 - `install.sh` install script and README instructions
 - `--version` flag
 
 Changed:
+
 - Improved CLI output, added colors, and updated `--help`
 - Updated project run/build handling in `run.py`/`build.py`
 
 ## [0.1.1] - 2026-02-11
+
 Changed:
+
 - Updated `--help`
 - `main.py` now runs correctly when executed directly
 
 ## [0.1.0] - 2026-02-11
+
 First public release.
 
 Added:
+
 - Base commands `new`, `init`, `build`, `run`, `clean`
 - Build profiles `debug` and `release`
 - `dcr.toml` and `src/main.c` templates

CONTRIBUTING.md

@@ -1,13 +1,13 @@
-# Вклад в проект
+# Contributing
 
-Спасибо за интерес к проекту.
+Thanks for your interest in the project.
 
-## Требования
+## Requirements
 
-- Использовать Rust stable.
-- Перед PR код должен проходить форматирование, линт и сборку.
+- Use Rust stable.
+- Before opening a PR, the code must pass formatting, linting, and build.
 
-## Быстрый старт
+## Quick Start
 
 ```bash
 git clone https://github.com/dexoron/dcr.git
@@ -15,43 +15,65 @@ cd dcr
 cargo check
 ```
 
-## Стиль кода
+## Code Style
 
-- Форматируйте код через `cargo fmt`.
-- Проверяйте предупреждения через `cargo clippy`.
-- Держите функции небольшими и сфокусированными.
-- Предпочитайте понятные имена вместо "хитрых".
+- Format code with `cargo fmt`.
+- Check warnings with `cargo clippy`.
+- Keep functions small and focused.
+- Prefer clear names over clever ones.
 
-## Проверки
+## Target System
 
-Перед PR запускайте:
+DCR supports cross-compilation via `--target <triple>` or short names:
+
+- `dcr build --target linux --release` (maps to `x86_64-unknown-linux-gnu`)
+- `dcr build --target macos --release` (maps to `x86_64-apple-darwin`)
+- `dcr build --target windows --release` (maps to `x86_64-pc-windows-msvc`)
+- Full triples: `dcr build --target aarch64-linux-gnu --release`
+- Configure multiple targets in `dcr.toml`:
+  ```
+  [build.targets]
+  targets = ["linux", "macos"]
+
+  [build.linux]
+  compiler = "gcc"
+
+  [build.macos]
+  compiler = "clang"
+  ```
+- If no `--target`, builds for targets in `build.targets` or native if empty.
+
+## Checks
+
+Before PR, run:
 
 ```bash
 cargo fmt --all
 cargo clippy --all-targets --all-features -- -D warnings
 cargo check
+cargo test
 ```
 
-## CI/CD и релизы
+## CI/CD and Releases
 
 - CI: `.github/workflows/ci.yml`
 - Release: `.github/workflows/release.yml`
-- Релиз запускается по тегу `v*` и публикует бинарники для:
+- Releases are triggered by tags `v*` and publish binaries for:
 - `x86_64-unknown-linux-gnu`
 - `x86_64-apple-darwin`
 - `aarch64-apple-darwin`
 - `x86_64-pc-windows-msvc`
 
-## Коммиты и PR
+## Commits and PRs
 
-- Делайте коммиты понятными.
-- В PR указывайте краткое описание и мотивацию изменений.
-- Обновляйте документацию при изменении поведения.
+- Write clear commit messages.
+- In PRs, include a short description and rationale.
+- Update documentation when behavior changes.
 
-## Вопросы
+## Questions
 
-Если что-то непонятно, открой issue или задайте вопрос в PR.
+If anything is unclear, open an issue or ask in the PR.
 
-Также можно задать вопрос напрямую:
+You can also reach out directly:
 - TG: @dexoron
 - DS: dexoron

Cargo.lock

@@ -26,6 +26,15 @@ version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
 
+[[package]]
+name = "block-buffer"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.19.1"
@@ -61,15 +70,46 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
 [[package]]
-name = "dcr"
-version = "0.2.3"
+name = "cpufeatures"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59ed5838eebb26a2bb2e58f6d5b5316989ae9d08bab10e0e6d103e656d1b0280"
 dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "crypto-common"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78c8292055d1c1df0cce5d180393dc8cce0abec0a7102adb6c7b1eef6016d60a"
+dependencies = [
+ "generic-array",
+ "typenum",
+]
+
+[[package]]
+name = "dcr"
+version = "0.5.0"
+dependencies = [
+ "glob",
  "reqwest",
  "self-replace",
  "serde",
+ "sha2",
  "toml",
 ]
 
+[[package]]
+name = "digest"
+version = "0.10.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
+dependencies = [
+ "block-buffer",
+ "crypto-common",
+]
+
 [[package]]
 name = "displaydoc"
 version = "0.2.5"
@@ -173,6 +213,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -213,6 +263,12 @@ dependencies = [
  "wasip3",
 ]
 
+[[package]]
+name = "glob"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0cc23270f6e1808e30a928bdc84dea0b9b4136a8bc82338574f23baf47bbd280"
+
 [[package]]
 name = "hashbrown"
 version = "0.15.5"
@@ -900,6 +956,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -1162,6 +1229,12 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
+[[package]]
+name = "typenum"
+version = "1.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.24"
@@ -1198,6 +1271,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "want"
 version = "0.3.1"

Cargo.toml

@@ -1,11 +1,13 @@
 [package]
 name = "dcr"
-version = "0.2.3"
+version = "0.5.0"
 edition = "2024"
 build = "build.rs"
 
 [dependencies]
+glob = "0.3"
 reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "rustls-tls"] }
 serde = { version = "1", features = ["derive"] }
 self-replace = "1"
+sha2 = "0.10"
 toml = "1.0.3"

README.md

@@ -14,7 +14,13 @@ The current implementation is written in Rust.
 - Build a project with `debug` and `release` profiles
 - Run the compiled binary
 - Clean build artifacts
+- Generate IDE integration files (VS Code, CLion) and compilation databases
 - Generate a minimal C project template
+- Build static and shared libraries
+- ASM projects with NASM/GAS or via GCC/Clang
+- Mixed language projects (`language = ["c", "asm"]` and similar)
+- Cross-compilation with `--target` (short names: `linux`, `macos`, `windows`)
+- Target-specific configurations and inheritance
 - Update the binary via `dcr --update` (GitHub Releases, not for pacman/AUR installs)
 
 ## Supported Platforms
@@ -102,20 +108,72 @@ Creates a project in the current directory. The project name is taken from the d
 
 ### `dcr build [profile]`
 Builds the project. If no profile is specified, `--debug` is used.
+Use `--force` to rebuild without cache, `--clean` to clean before build.
 
 ### `dcr run [profile]`
 Builds the project and runs the binary. If no profile is specified, `--debug` is used.
+Use `--force` to rebuild without cache, `--clean` to clean before build.
 
 Run manually:
 `./target/<profile>/<name>`
 
 ### `dcr clean`
 Removes the `target` directory in the project root.
+Use `dcr clean --all` in a workspace root to clean all member projects.
+
+### `dcr gen`
+Generates IDE integration files and build tools.
+- `dcr gen vscode`: VS Code workspace config
+- `dcr gen clion`: CLion project files
+- `dcr gen compile-commands`: `compile_commands.json` for clang tools
+
+### `dcr test`
+Runs the test suite.
+Use `dcr test --init` to create test files.
 
 ## Build Profiles
 Two profiles are supported:
-- `--debug` (default) - flags: `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDEBUG`(Clang)
-- `--release` - flags: `-O3 -DNDEBUG -march=native`(Clang)
+- `--debug` (default) - built-in flags per compiler
+- `--release` - built-in flags per compiler
+
+Custom flags can be added in `dcr.toml` via `build.cflags` and `build.ldflags`.
+Profile-specific flags can be added via `[build.debug]` and `[build.release]`.
+You can also set `build.target` to override the output directory (profile-independent).
+You can set `build.platform` to pass `-march=<platform>` (GCC/Clang) or `/arch:*` (MSVC) where supported.
+Use `build.kind = "staticlib"` to build a static library instead of a binary.
+Use `build.kind = "sharedlib"` to build a shared library (`.so`/`.dylib`/`.dll`).
+`dcr run` is only for `build.kind = "bin"` and will fail for libraries.
+Use `build.exclude`/`build.include` to control source/header collection.
+Use `build.roots` and `build.src_disable` to replace the default `src/` root.
+Use `build.steps` and `build.post_steps` to run custom commands.
+Use `build.clean` for extra cleanup paths and `[run].cmd` to override run command.
+
+## Cross-compilation
+
+DCR supports cross-compilation via `--target <triple>` or short names:
+
+```sh
+dcr build --target linux --release    # x86_64-unknown-linux-gnu
+dcr build --target macos --release    # x86_64-apple-darwin
+dcr build --target windows --release  # x86_64-pc-windows-msvc
+dcr run --target aarch64-linux-gnu
+```
+
+Configure multiple targets and target-specific settings in `dcr.toml`:
+
+```toml
+[build.targets]
+targets = ["linux", "windows"]
+
+[build.linux]
+compiler = "gcc"
+cflags = ["-O2"]
+
+[build.windows]
+compiler = "x86_64-w64-mingw32-gcc"
+```
+
+See [Cross-compilation guide](docs/dependencies-and-build/cross-compilation.md) for details.
 
 ## Configuration
 The main project file is `dcr.toml`.
@@ -131,10 +189,43 @@ version = "0.1.0"
 language = "c"
 standard = "c11"
 compiler = "clang"
+# Optional platform hint
+# platform = "x86_64"
+# Optional custom flags
+cflags = ["-Wall", "-Wextra"]
+ldflags = ["-lm"]
+#
+# Optional include/exclude:
+# exclude = ["src/vendor", "src/legacy/**"]
+# include = ["src/boot/arch/**"]
+
+[toolchain]
+# Optional tool overrides:
+# cc = "clang"
+# cxx = "clang++"
+# as = "as"
+# ar = "ar"
+# ld = "ld"
+# uic = "uic"
+# moc = "moc"
+# rcc = "rcc"
 
 [dependencies]
 ```
 
+Workspace example:
+
+```toml
+[workspace]
+kernel = { path = "src/kernel", deps = ["core", "userspace"] }
+core = { path = "src/core", deps = ["userspace"] }
+userspace = { path = "src/userspace" }
+```
+
+Path dependencies are supported. DCR will resolve them on build and generate `dcr.lock`.
+
+Incremental build note: object files are rebuilt when source `.c/.cpp` files change. Header dependency tracking is not implemented yet.
+
 ## Requirements
 - Rust toolchain (`rustc`, `cargo`) - for building DCR from source
 - C compiler (`clang`, `gcc`, or 'cl'(msvc))

TODO.md

@@ -0,0 +1,9 @@
+# TODO
+
+- Add external package managers (Conan, vcpkg)
+- Linker script + direct linker control
+- Custom targets/steps
+- Cross-compilation and freestanding targets (-nostdinc, -nostdlib, custom target triple like i686-elf)
+- Mixed C + ASM in one project (compile .c and .s/.S sources together)
+- Per-member include directories in workspace (e.g. include paths for subprojects)
+- Build-time code generation (auto-generated headers, pre-build scripts)

docs/CONTRIBUTING_ru.md

@@ -1,57 +0,0 @@
-# Вклад в проект
-
-Спасибо за интерес к проекту.
-
-## Требования
-
-- Использовать Rust stable.
-- Перед PR код должен проходить форматирование, линт и сборку.
-
-## Быстрый старт
-
-```bash
-git clone https://github.com/dexoron/dcr.git
-cd dcr
-cargo check
-```
-
-## Стиль кода
-
-- Форматируйте код через `cargo fmt`.
-- Проверяйте предупреждения через `cargo clippy`.
-- Держите функции небольшими и сфокусированными.
-- Предпочитайте понятные имена вместо "хитрых".
-
-## Проверки
-
-Перед PR запускайте:
-
-```bash
-cargo fmt --all
-cargo clippy --all-targets --all-features -- -D warnings
-cargo check
-```
-
-## CI/CD и релизы
-
-- CI: `.github/workflows/ci.yml`
-- Release: `.github/workflows/release.yml`
-- Релиз запускается по тегу `v*` и публикует бинарники для:
-- `x86_64-unknown-linux-gnu`
-- `x86_64-apple-darwin`
-- `aarch64-apple-darwin`
-- `x86_64-pc-windows-msvc`
-
-## Коммиты и PR
-
-- Делайте коммиты понятными.
-- В PR указывайте краткое описание и мотивацию изменений.
-- Обновляйте документацию при изменении поведения.
-
-## Вопросы
-
-Если что-то непонятно, открой issue или задайте вопрос в PR.
-
-Также можно задать вопрос напрямую:
-- TG: @dexoron
-- DS: dexoron

docs/FAQ_ru.md

@@ -1,102 +0,0 @@
-# FAQ
-
-## В чем суть проекта?
-`dcr` - это инструмент для управления C/C++ проектами и их зависимостями.
-Он вдохновлен Cargo, но не является аналогом Makefile, CMake или других классических систем сборки.
-
-Цель проекта - дать более простую и удобную в настройке среду для разработки.
-
-## Как разрабатывается проект?
-Проект написан на Rust и в основном развивается одним разработчиком - Dexoron.
-
-В работе используются ИИ-инструменты, но они не пишут проект целиком: их роль - помощь с отдельными задачами (например, советы, проверка формулировок, переводы и т.д.).
-
-## Какие инструменты используются для разработки?
-Основной стек разработки:
-- `RustRover` 2025 - IDE для разработки.
-- `Codex` (`GPT-5.3-Codex (medium)`) - основной ИИ-инструмент, интегрированный через JetBrains AI Chat.
-- `Rust` - основной язык проекта.
-- `Cargo` - инструмент сборки, тестов и управления зависимостями Rust-проектов.
-
-## Проект открытый?
-Да, проект открыт (Open Source).
-Вы можете предлагать идеи, находить ошибки и вносить изменения в код.
-
-Проект распространяется по лицензии MIT (см. `LICENSE`).
-
-## Как внести вклад?
-Спасибо за желание помочь проекту.
-Вы можете:
-- помочь с кодом;
-- помочь с переводом;
-- помочь с документацией;
-- предложить идею или сообщить о баге.
-
-### Если вы хотите внести изменения (код, перевод, документация)
-1. Сделайте форк нужного репозитория: `dexoron/dcr` (основной проект) или `dexoron/dcr-site` (сайт проекта).
-2. Внесите изменения с учетом правил из `CONTRIBUTING.md`.
-3. Отправьте изменения в свой форк.
-4. Создайте Pull Request.
-5. Дождитесь ревью.
-
-### Если вы хотите сообщить о проблеме или предложить идею
-1. Откройте нужный репозиторий: `dexoron/dcr` или `dexoron/dcr-site`.
-2. Перейдите во вкладку `Issues`.
-3. Создайте Issue и укажите тип (баг, предложение, вопрос/помощь).
-4. Опишите проблему или идею кратко и понятно.
-5. Дождитесь обратной связи.
-
-## Как установить `dcr`?
-Актуальные способы установки зависят от текущей версии проекта.
-Рекомендуемый путь:
-- проверьте инструкции в `README.md`;
-- если готового пакета для вашей платформы нет, соберите проект из исходников через `cargo build --release`.
-
-## Как быстро начать работу?
-Минимальный сценарий:
-1. Установите `dcr`.
-2. Создайте проект (или перейдите в существующий C/C++ проект).
-3. Инициализируйте конфигурацию `dcr`.
-4. Добавьте зависимости проекта.
-5. Запустите сборку через `dcr`.
-
-Подробные команды и примеры смотрите в `README.md` и документации проекта.
-
-## На какой стадии проект?
-`dcr` активно развивается.
-Это означает, что интерфейсы и поведение некоторых функций могут меняться между версиями.
-
-Перед обновлением рекомендуется читать changelog и проверять заметки к релизу.
-
-## С какими системами работает `dcr`?
-`dcr` ориентирован на современные среды разработки C/C++.
-Фактическая совместимость зависит от версии `dcr`, операционной системы и используемого toolchain.
-
-Перед началом работы проверьте в документации:
-- поддерживаемые ОС;
-- поддерживаемые компиляторы и линкеры;
-- ограничения конкретной версии.
-
-## Чем `dcr` отличается от Make/CMake?
-`dcr` не пытается быть прямой заменой Make/CMake.
-Главный фокус `dcr` - упростить управление проектом и зависимостями в стиле, близком к опыту Cargo.
-
-Если вам нужен низкоуровневый полный контроль над процессом сборки, классические инструменты могут быть привычнее.
-Если нужна более простая и единообразная модель конфигурации - `dcr` может быть удобнее.
-
-## Где смотреть документацию и примеры?
-Основные источники:
-- `README.md` в репозитории;
-- документация проекта (смотреть сайт проекта);
-- `Issues` для известных проблем и обсуждений;
-
-## Как правильно сообщить о баге?
-Чтобы баг-репорт можно было быстро воспроизвести, укажите:
-1. Версию `dcr`.
-2. ОС и версию компилятора/toolchain.
-3. Шаги воспроизведения.
-4. Ожидаемое поведение.
-5. Фактическое поведение и текст ошибки.
-6. Минимальный пример проекта (по возможности).
-
-Баги и проблемы отправляйте через `Issues` в соответствующем репозитории.

docs/README.md

@@ -0,0 +1,46 @@
+# Introduction
+
+DCR (Dexoron Cargo Realization) is a Cargo-style CLI for C/C++ projects.
+
+Current DCR focuses on a simple, predictable workflow:
+
+- create or initialize a project (`dcr new`, `dcr init`)
+- build with `debug` or `release` profiles (`dcr build`)
+- run binaries (`dcr run`)
+- clean artifacts (`dcr clean`)
+- update the installed binary (`dcr --update`)
+
+## What is implemented in this version
+
+- Project configuration in `dcr.toml` with `[package]`, `[build]`, `[dependencies]`.
+- Recursive source discovery in `src/`:
+  - C: `*.c`
+  - C++: `*.cpp`, `*.cxx`, `*.cc`
+- Compiler selection from `dcr.toml` (`clang`, `gcc`, `cl`, `clang-cl`, etc.).
+- ASM support via `language = "asm"` (GCC/Clang, NASM, GAS).
+- Mixed language builds via `language = ["c", "asm"]` and similar combinations.
+- Three build kinds:
+  - `bin` (default)
+  - `staticlib`
+  - `sharedlib`
+- Optional custom output directory via `build.target`.
+- Optional `build.platform` to pass architecture hints (`-march` / `/arch`).
+- Optional `build.exclude`/`build.include` for source/header selection.
+- Optional `build.roots`/`build.src_disable` to replace the default `src/` root.
+- Optional build steps with `build.steps` and `build.post_steps`.
+- Optional `build.pkg_config` integration.
+- Optional `build.clean` and `build.expect`.
+- Optional `[run].cmd` to override run command.
+- Workspace builds via `[workspace]` with per-project `dcr.toml`.
+- Path dependencies with include/lib resolution and `dcr.lock` generation.
+
+## Important behavior notes
+
+- `dcr.toml` is required for `build`, `run`, and `clean`.
+- `run` works only with `build.kind = "bin"`.
+- Incremental rebuild tracks source file timestamps and header dependencies (rebuilds when either source or included headers change).
+- Object files are always created under `target/<profile>/obj/`.
+
+## Repository
+
+- <https://github.com/dexoron/dcr>

docs/README_ru.md

@@ -1,146 +0,0 @@
-# DCR (Dexoron Cargo Realization)
-
-DCR — это утилита для управления проектами на C/C++ в стиле Cargo.
-
-Текущая реализация написана на Rust.
-
-## Зачем DCR
-- Единая структура проекта без ручной настройки
-- Простые команды для типовых задач
-- Прозрачная компиляция и предсказуемые профили сборки
-
-## Возможности
-- Создание нового проекта или инициализация текущей директории
-- Сборка проекта в профилях `debug` и `release`
-- Запуск собранного бинарника
-- Очистка результатов сборки
-- Генерация минимального шаблона C-проекта
-- Обновление бинарника через `dcr --update` (GitHub Releases, не для pacman-установок)
-
-## Поддерживаемые платформы
-- Linux: `x86_64-unknown-linux-gnu`
-- macOS Intel: `x86_64-apple-darwin`
-- macOS Apple Silicon: `aarch64-apple-darwin`
-- Windows: `x86_64-pc-windows-msvc`
-
-## Установка
-
-### Пакетный менеджер
-
-**ArchLinux**
-```sh
-yay -S dcr # или paru и остальные менеджеры пакетов AUR 
-```
-
-### Из исходников
-
-```sh
-git clone https://github.com/dexoron/dcr.git
-cd dcr
-cargo build --release
-mkdir -p ~/.local/bin
-ln -sf "$PWD/target/release/dcr" ~/.local/bin/dcr
-```
-
-### Через install.sh (Linux/macOS)
-
-```sh
-curl -fsSL https://dcr.dexoron.su/install.sh | bash
-```
-
-### Через install.ps1 (Windows)
-
-```powershell
-irm https://dcr.dexoron.su/install.ps1 | iex
-```
-
-Оба скрипта при запуске спрашивают:
-- скачать готовый бинарник из GitHub Release
-- или собрать проект из `git`
-
-Релизные ассеты:
-- `dcr-x86_64-unknown-linux-gnu`
-- `dcr-x86_64-apple-darwin`
-- `dcr-aarch64-apple-darwin`
-- `dcr-x86_64-pc-windows-msvc.exe`
-
-## Обновление
-
-- Если DCR установлен из GitHub Releases, через `install.sh`, `install.ps1` или собран вручную:
-  - используйте `dcr --update`
-- Если DCR установлен через `pacman/AUR`:
-  - обновляйте через пакетный менеджер: `paru/yay -Syu dcr` или `sudo pacman -Syu dcr`
-  - `dcr --update` определяет пакетную установку и подсказывает обновляться через пакетный менеджер
-
-## Быстрый старт
-
-Создать новый проект:
-`dcr new hello`
-
-Или инициализировать текущую директорию (директория должна быть пустой):
-`dcr init`
-
-Структура проекта:
-
-```txt
-hello/
-- src/
-- - main.c
-- dcr.toml
-```
-
-Сборка и запуск проекта:
-`dcr run` или `dcr run --release`
-
-## Команды
-
-### `dcr new <name>`
-Создает проект в текущей директории с указанным именем.
-
-### `dcr init`
-Создает проект в текущей директории. Имя проекта будет равно имени директории. Директория должна быть пустой.
-
-### `dcr build [profile]`
-Собирает проект. Если профиль не указан, используется `--debug`.
-
-### `dcr run [profile]`
-Собирает проект и запускает бинарник. Если профиль не указан, используется `--debug`.
-
-Запуск вручную:
-`./target/<profile>/<name>`
-
-### `dcr clean`
-Удаляет папку `target` в корне проекта.
-
-## Профили сборки
-Поддерживаются два профиля:
-- `--debug` (по умолчанию) — флаги: `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDEBUG`(Clang)
-- `--release` — флаги: `-O3 -DNDEBUG -march=native`(Clang)
-
-## Конфигурация
-Основной файл проекта — `dcr.toml`.
-
-Пример `dcr.toml`:
-
-```toml
-[package]
-name = "hello"
-version = "0.1.0"
-
-[build]
-language = "c"
-standard = "c11"
-compiler = "clang"
-
-[dependencies]
-```
-
-## Требования
-- Rust toolchain (`rustc`, `cargo`) - Для ручной сборки DCR
-- C-компилятор (`clang`, `gcc` или 'cl'(msvc))
-
-## Релизы
-Релизы собираются автоматически через GitHub Actions (`.github/workflows/release.yml`) при пуше тега формата `v*`.
-
-## Лицензия
-См. файл `LICENSE`.

docs/SUMMARY.md

@@ -0,0 +1,47 @@
+# Table of contents
+
+* [Introduction](README.md)
+
+## Getting started
+
+* [Installation](getting-started/installation.md)
+* [Create your first project](getting-started/create-your-first-project.md)
+* [Project structure](getting-started/project-structure.md)
+* [Build and run](getting-started/build-and-run.md)
+
+## Configuration
+
+* [dcr.toml overview](configuration/dcr.toml-overview.md)
+* [Package section](configuration/package-section.md)
+* [Build section](configuration/build-section.md)
+* [Dependencies section](configuration/dependencies-section.md)
+* [Build profiles](configuration/build-profiles.md)
+
+## Commands
+
+* [Global options](commands/global-options.md)
+* [dcr init/new](commands/dcr-init-or-new.md)
+* [dcr build](commands/dcr-build.md)
+* [dcr run](commands/dcr-run.md)
+* [dcr clean](commands/dcr-clean.md)
+* [dcr gen](commands/dcr-gen.md)
+* [dcr test](commands/dcr-test.md)
+
+## Dependencies & Build
+
+* [Dependency format](dependencies-and-build/dependency-format.md)
+* [Local dependencies](dependencies-and-build/local-dependencies.md)
+* [Versioning & lock file](dependencies-and-build/versioning-and-lock-file.md)
+* [Target directory](dependencies-and-build/target-directory.md)
+* [Cross-compilation and targets](dependencies-and-build/cross-compilation.md)
+* [Compilers & linking](dependencies-and-build/compilers-and-linking.md)
+
+## Reference & Help
+
+* [CLI reference](reference-and-help/cli-reference.md)
+* [Config reference](reference-and-help/config-reference.md)
+* [Workspace guide](reference-and-help/workspace-guide.md)
+* [Flags & environment](reference-and-help/flags-and-environment.md)
+* [Troubleshooting map](reference-and-help/troubleshooting-map.md)
+* [FAQ](reference-and-help/faq.md)
+* [Contributing & Bug reports](reference-and-help/contributing-and-bug-reports.md)

docs/commands/dcr-build.md

@@ -0,0 +1,68 @@
+# dcr build
+
+Builds the project in `debug` or `release` profile.
+
+## Usage
+
+```sh
+dcr build
+dcr build --debug
+dcr build --release
+dcr build --target linux --release
+dcr build --release --force
+dcr build --debug --clean
+```
+
+## What `build` does
+
+1. Checks that `dcr.toml` exists and is valid.
+2. Reads build settings from `[build]`.
+3. Resolves path dependencies from `[dependencies]`.
+4. Creates required output directories.
+5. Recursively compiles sources from `src/`.
+6. Links final artifact (binary or library).
+
+## Config values used
+
+- `package.name`
+- `build.compiler`
+- `build.language`
+- `build.standard`
+- `build.kind`
+- `build.target`
+- `build.platform`
+- `build.cflags`
+- `build.ldflags`
+- `build.debug` / `build.release`
+- `build.exclude`
+- `build.include`
+- `build.pkg_config`
+- `build.steps`
+- `build.post_steps`
+- `build.generated`
+- `build.expect`
+- `build.clean`
+
+## Source selection
+
+- `language = "c"` -> `*.c`
+- `language = "c++" | "cpp" | "cxx"` -> `*.cpp`, `*.cxx`, `*.cc`
+- `language = "asm"` -> `*.s`, `*.S`, `*.asm`
+- Mixed languages are supported with arrays, for example `language = ["c", "asm"]`.
+- By default sources are searched in `src/`; use `build.roots` and `build.src_disable` to override.
+
+## Notes
+
+- Profile flag (`--debug` / `--release`) can appear in any argument position (duplicates are rejected).
+- Unknown profile flags return an error.
+- `--target <triple>` builds for specified target (short names: `linux`, `macos`, `windows`).
+- If no `--target`, builds for `build.targets` or native.
+- Incremental rebuild checks source/object mtime and tracked header dependencies.
+- `--force` skips build cache checks and recompiles.
+- `--clean` removes `target/<profile>` and `build.clean` paths before building.
+- Default GCC/Clang profile flags: `debug` -> `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDCR_DEBUG`, `release` -> `-O3 -DNDEBUG`.
+- For `language = "asm"` with `compiler = "as"`/`"gas"`, use `.s` files (no preprocessing). For `.S`, use `gcc` or `clang`.
+- In workspace root, `dcr build` builds all members in dependency order.
+- `build.exclude` removes paths from source/header collection; `build.include` re-allows matching paths and has priority over `exclude`.
+- `build.steps` run before compilation; `build.post_steps` run after linking.
+- `build.generated` is cleaned when `build.steps` need to rerun; `build.expect` is verified after post-steps.

docs/commands/dcr-clean.md

@@ -0,0 +1,27 @@
+# dcr clean
+
+Removes build artifacts in `target/`.
+
+## Usage
+
+```sh
+dcr clean
+dcr clean --debug
+dcr clean --release
+dcr clean --all
+dcr clean --release --all
+```
+
+## Behavior
+
+- Without arguments: removes entire `target/`.
+- With profile: removes only `target/<profile>/`.
+- With `--all`: also cleans all workspace members.
+- Additionally removes paths from `build.clean` if configured.
+- `build.clean` supports `{profile}` and version placeholders.
+
+## Validation
+
+- `dcr.toml` must exist.
+- Unknown flags are treated as error.
+- If `target` or selected profile directory does not exist, command prints a warning.

docs/commands/dcr-gen.md

@@ -0,0 +1,170 @@
+# dcr gen
+
+Generates IDE and build tool integration files for C/C++ development environments.
+
+## Usage
+
+```sh
+dcr gen project-info
+dcr gen project-info --release
+dcr gen compile-commands
+dcr gen compile-commands --debug
+dcr gen vscode
+dcr gen vscode --release
+dcr gen clion
+dcr gen clion --debug
+```
+
+## Subcommands
+
+### `dcr gen project-info`
+
+Outputs project metadata as JSON array.
+
+```sh
+dcr gen project-info [--debug | --release]
+```
+
+Outputs structured information about the project (root project + all workspace members if present):
+
+```json
+[
+  {
+    "name": "my-project",
+    "version": "1.0.0",
+    "root": "/path/to/root",
+    "profile": "debug",
+    "language": "c++",
+    "standard": "c++17",
+    "compiler": "g++",
+    "kind": "bin",
+    "sources": ["/path/to/root/src/main.cpp", ...],
+    "include_dirs": ["/path/to/dep/include", ...],
+    "lib_dirs": ["/path/to/dep/lib", ...],
+    "libs": ["somelib", ...],
+    "cflags": ["-Wall", ...],
+    "ldflags": ["-lm", ...]
+  }
+]
+```
+
+This is useful for integrating DCR projects with custom build tools or scripts.
+
+### `dcr gen compile-commands`
+
+Generates `compile_commands.json` for use by `clangd`, `clang-tidy`, and other tools.
+
+```sh
+dcr gen compile-commands [--debug | --release]
+```
+
+Writes `./compile_commands.json` containing compilation database entries for all source files. This file is recognized by:
+- LSP servers (`clangd`, `clang-tools-extra`)
+- Linters (`clang-tidy`)
+- Format tools (`clang-format`)
+
+The entries include:
+- Full compiler command with flags
+- Source file path
+- Object file output path
+- Project root as working directory
+
+### `dcr gen vscode`
+
+Generates Visual Studio Code integration files.
+
+```sh
+dcr gen vscode [--debug | --release]
+```
+
+Creates `.vscode/` directory with:
+
+- **`launch.json`**: Debug configurations (one per binary target, debug + release variants)
+- **`tasks.json`**: Build/run/clean tasks using `dcr` commands
+- **`settings.json`**: Clangd configuration pointing to `compile_commands.json`
+- **`extensions.json`**: Recommends `clangd`, disables `cpptools`
+- **`compile_commands.json`**: Compilation database (same as `dcr gen compile-commands`)
+
+Usage in VSCode:
+- Open the Command Palette (`Ctrl+Shift+P`) and select **"Debug: Start Debugging"** to run debugger
+- Press `Ctrl+Shift+B` to run the build task
+- Clangd will provide IntelliSense and diagnostics based on `compile_commands.json`
+- Generated `launch.json` uses CodeLLDB (`type: "lldb"`), so install `vadimcn.vscode-lldb`
+
+### `dcr gen clion`
+
+Generates JetBrains CLion integration files.
+
+```sh
+dcr gen clion [--debug | --release]
+```
+
+Creates `.idea/` directory with:
+
+- **`externalTools.xml`**: Registers DCR build/clean/gen commands as external tools
+- **`customTargets.xml`**: Defines build targets for debug and release
+- **`misc.xml`**: Points CLion to `compile_commands.json` for compilation database
+- **`.idea/.gitignore`**: Ignores auto-generated files
+- **`runConfigurations/*.xml`**: Debug run configs (one per binary target)
+- **`compile_commands.json`**: Compilation database (same as `dcr gen compile-commands`)
+
+Usage in CLion:
+- Build/clean via **Tools → DCR → Build Debug/Release/Clean**
+- Run/debug via **Run → Run Configurations** (dropdown) → select generated config
+- Code completion and diagnostics come from the compilation database
+
+## Config values used
+
+- `package.name`
+- `build.compiler`
+- `build.language`
+- `build.standard`
+- `build.kind`
+- `build.target`
+- `build.platform`
+- `build.cflags`
+- `build.ldflags`
+- `build.debug` / `build.release`
+- `build.exclude`
+- `build.include`
+- `build.pkg_config`
+- `build.roots`
+- `build.src_disable`
+- Workspace members (if `[workspace]` is present)
+
+## Workspace support
+
+When running `dcr gen` in a workspace root, all commands process both the root project and all workspace members:
+
+- `project-info` returns an array with entries for each member + root
+- `compile-commands` includes entries from all members
+- `vscode` and `clion` generate unified configurations that work across all members
+
+## Troubleshooting
+
+### Clangd not picking up includes
+
+- Ensure `compile_commands.json` exists in the workspace root
+- In VSCode settings, verify `clangd.arguments` includes `--compile-commands-dir=<workspace-root>`
+- Rebuild via `dcr gen compile-commands` if sources or dependencies changed
+
+### Debug configuration not working
+
+- Verify binary paths in `launch.json` match actual build output (`target/<profile>/binary-name`)
+- For workspace projects, each member's debug config uses its own `target/` directory
+- Ensure GDB/LLDB is installed: `gdb --version` or `lldb --version`
+- If VSCode reports unsupported debugger type, install the extension that matches `launch.json` type (`vadimcn.vscode-lldb` for `lldb`)
+
+### CLion not recognizing includes
+
+- Regenerate via `dcr gen clion --debug`
+- File → Invalidate Caches → Invalidate and Restart
+- Verify `.idea/misc.xml` points to correct `compile_commands.json` path
+
+## Notes
+
+- Profiles default to `debug` if not specified
+- Generation does not require the project to be built first
+- Generated files are safe to commit; they are generated from `dcr.toml` and thus repeatable
+- IDE configurations may be customized after generation, but changes will be overwritten on next `dcr gen` run
+- For multi-binary projects, `vscode` and `clion` generate debug configs for all binaries (both debug + release variants)

docs/commands/dcr-init-or-new.md

@@ -0,0 +1,43 @@
+# dcr init/new
+
+## `dcr new <name>`
+
+Creates a new project directory and initializes it.
+
+```sh
+dcr new hello
+```
+
+Behavior:
+
+1. Validates arguments (`<name>` is required, only one name is allowed).
+2. Creates `<name>/`.
+3. Creates `<name>/dcr.toml`.
+4. Sets `package.name = "<name>"`.
+5. Creates `<name>/src/main.c` with a Hello World template.
+
+Errors:
+
+- Missing project name.
+- Extra arguments.
+- Target directory already exists.
+
+## `dcr init`
+
+Initializes DCR in the current directory.
+
+```sh
+dcr init
+```
+
+Behavior:
+
+1. Requires current directory to be empty.
+2. Creates `dcr.toml`.
+3. Sets `package.name` from the current directory name.
+4. Creates `src/main.c`.
+
+Errors:
+
+- Any arguments are treated as invalid.
+- Non-empty directory is rejected.

docs/commands/dcr-run.md

@@ -0,0 +1,40 @@
+# dcr run
+
+Builds the project and runs the resulting binary.
+
+## Usage
+
+```sh
+dcr run
+dcr run --debug
+dcr run --release
+dcr run --target linux --release
+dcr run --release --force
+dcr run --debug --clean
+```
+
+## Behavior
+
+1. Validates `dcr.toml`.
+2. Reads `package.name`, `build.kind`, and optional `build.target`.
+3. Runs the same build flow as `dcr build`.
+4. Executes the built artifact path for the selected profile.
+5. If `[run].cmd` is set, runs that command instead of the built binary.
+
+## Restrictions
+
+- If `build.kind = "staticlib"` or `build.kind = "sharedlib"`, `run` exits with error.
+- The profile is selected from the first argument.
+- `--target <triple>` runs the binary for specified target (short names: `linux`, `macos`, `windows`).
+- `--force` skips build cache checks and recompiles.
+- `--clean` removes `target/<profile>` and `build.clean` paths before building.
+
+## `run.cmd` variables
+
+`run.cmd` supports the same variables as build steps: `{profile}`, `{version}`, `{version_major}`,
+`{version_minor}`, `{version_patch}`, `{version_suffix}`, `{version_suffix_dash}`.
+The command runs via `sh -c` on Unix and `cmd /C` on Windows.
+
+## On build failure
+
+`dcr run` attempts to launch an existing binary from the same profile if present; otherwise it reports that code errors must be fixed.

docs/commands/dcr-test.md

@@ -0,0 +1,44 @@
+# dcr test
+
+Runs the project's test suite.
+
+## Usage
+
+```sh
+dcr test
+dcr test --release
+dcr test --target linux
+dcr test --init
+```
+
+## What `test` does
+
+1. Builds the project with the specified profile/target.
+2. Compiles test files in `tests/` (e.g., `tests/test.c`) into a test binary.
+3. Runs the test binary and parses output for PASS/SKIP/FAIL results.
+4. Reports summary with colored output.
+
+## Test Structure
+
+DCR uses a simple test framework:
+
+- Header: `tests/dcr_test.h` (generated by `dcr test --init`)
+- Test file: `tests/test.c` (template generated by `dcr test --init`)
+- Macros: `TEST(name)`, `TEST_CASE(name)`, `EXPECT(condition)`, `SKIP(reason)`
+- Output: `[PASS] test_name`, `[FAIL] test_name`, or `[SKIP] test_name`
+
+## Config values used
+
+- `package.name`
+- `build.compiler`, `build.language`, `build.standard`
+- `build.cflags`, `build.ldflags`
+- `build.debug` / `build.release`
+- `build.targets` (if specified)
+
+## Notes
+
+- Test binary is linked with the main project (for lib projects) or standalone.
+- `--init` creates `tests/dcr_test.h` and `tests/test.c` if missing.
+- Tests run in release mode by default for performance.
+- Custom test logic can be added by editing `tests/test.c`.
+- Fails if no `tests/test.c` exists (run `dcr test --init` first).

docs/commands/global-options.md

@@ -0,0 +1,44 @@
+# Global options
+
+## `dcr --help`
+
+```sh
+dcr --help
+```
+
+Prints top-level CLI usage, commands, flags, and examples.
+
+## `dcr --version`
+
+```sh
+dcr --version
+```
+
+Prints:
+
+```text
+dcr <version> (<target>)
+```
+
+## `dcr --update`
+
+```sh
+dcr --update
+```
+
+Update flow:
+
+1. Requests latest release from GitHub API.
+2. Finds asset matching current `DCR_TARGET`.
+3. Downloads replacement binary.
+4. Replaces current executable via `self-replace`.
+
+Limitations and behavior:
+
+- No extra arguments are accepted.
+- Requires network access to GitHub API/assets.
+- On Linux, if binary is owned by pacman, DCR prints package-manager update instructions instead of self-updating.
+
+## Running without command
+
+Running plain `dcr` (without arguments) shows help output.

docs/configuration/build-profiles.md

@@ -0,0 +1,74 @@
+# Build profiles
+
+DCR supports two profiles:
+
+- `debug` (default)
+- `release`
+
+## How to select
+
+```sh
+dcr build --debug
+dcr build --release
+dcr run --release
+dcr clean --debug
+```
+
+You can also add `--force` or `--clean` to `build`/`run`.
+
+## Default profile flags
+
+### GCC/Clang-like toolchains
+
+- `debug`: `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDCR_DEBUG`
+- `release`: `-O3 -DNDEBUG`
+
+### MSVC toolchain
+
+- `debug`: `/Od /Zi /W4 /DDCR_DEBUG /Oy-`
+- `release`: `/O2 /DNDEBUG`
+
+## Artifacts
+
+By default:
+
+- `target/debug/<name>` (or `.exe` on Windows)
+- `target/release/<name>` (or `.exe` on Windows)
+
+Default compiler flags:
+
+GCC/Clang:
+
+- `debug`: `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDCR_DEBUG`
+- `release`: `-O3 -DNDEBUG`
+
+MSVC:
+
+- `debug`: `/Od /Zi /W4 /DDCR_DEBUG /Oy-`
+- `release`: `/O2 /DNDEBUG`
+
+Static library mode (`kind = "staticlib"`):
+
+- Linux/macOS: `lib<name>.a`
+- Windows: `<name>.lib`
+
+Shared library mode (`kind = "sharedlib"`):
+
+- Linux: `lib<name>.so`
+- macOS: `lib<name>.dylib`
+- Windows: `<name>.dll`
+
+## Profile overrides
+
+Use `[build.debug]` and `[build.release]` to override build settings per profile.
+All values inherit from `[build]`. If a field is present in the profile table, it replaces the base value.
+For arrays (like `cflags`/`ldflags`), the profile value is appended to the base array.
+
+```toml
+[build.debug]
+cflags = ["-g3"]
+
+[build.release]
+cflags = ["-O3"]
+ldflags = ["-s"]
+```

docs/configuration/build-section.md

@@ -0,0 +1,148 @@
+# Build section
+
+## Schema
+
+```toml
+[build]
+language = "c"
+standard = "c11"
+compiler = "clang"
+kind = "bin"
+# optional:
+# inherit = true  # Inherit from base (default true)
+# targets = ["linux", "macos"]  # Multiple targets to build
+# target = "./dist"
+# platform = "x86_64"
+# cflags = ["-Wall"]
+# ldflags = ["-lm"]
+# exclude = ["src/vendor", "src/legacy/**"]
+# include = ["src/legacy/boot/**"]
+# roots = ["kernel", "drivers"]
+# src_disable = true
+# pkg_config = ["Qt6Core", "Qt6Widgets"]
+# generated = ["src/ui/*.h"]
+# expect = ["./target/{profile}/boot/*.bin"]
+# clean = ["./target/{profile}/boot", "/tmp/image/*.img"]
+```
+
+## Fields
+
+- `language` (string or array, required): `c`, `c++`, `cpp`, `cxx`, or `asm`.
+  Mixed languages can be specified as an array, for example `["c", "c++", "asm"]`.
+- `standard` (string, required): language standard passed to compiler.
+- `compiler` (string, required): compiler command (for example `clang`, `gcc`, `cl`).
+- `kind` (string, required): `bin`, `staticlib`, or `sharedlib`.
+- `inherit` (bool, optional): inherit settings from base `[build]` (default `true`). If `false`, only use target/profile specific settings.
+- `targets` (string array, optional): list of targets to build simultaneously. Supports short names (`linux`, `macos`, `windows`).
+- `target` (string, optional): custom output directory for final artifact.
+- `platform` (string, optional): architecture hint for compiler (used for `-march` or `/arch`).
+- `cflags` (string array, optional): extra compile flags.
+- `ldflags` (string array, optional): extra link flags.
+- `exclude` (string array, optional): paths or glob patterns to skip during source/header collection.
+- `include` (string array, optional): allowlist paths or globs that override `exclude`.
+- `include` directory entries (non-glob) are also passed to the compiler as `-I` include paths.
+- `roots` (string array, optional): additional source roots to scan instead of `src/`.
+- `src_disable` (bool, optional): disables default `src/` root when true.
+- `pkg_config` (string array, optional): packages used to append `pkg-config --cflags/--libs`.
+- `generated` (string array, optional): generated files to delete when build steps rerun.
+- `expect` (string array, optional): artifacts that must exist after build/post-steps.
+- `clean` (string array, optional): additional paths removed by `dcr clean` and `--clean`.
+
+Notes for `exclude`/`include`:
+- Supports `*` and `**` glob patterns.
+- If `include` is set, it has priority over `exclude`.
+- Use `include` to re-allow nested paths, for example exclude `src/boot` but allow `src/boot/arch/**`.
+When using glob patterns in `exclude`, DCR converts them internally, so `exclude` globs still work as expected.
+
+### Build steps
+
+Build steps run shell commands before compilation. Post steps run after linking.
+
+```toml
+[[build.steps]]
+name = "uic"
+in = "src/ui/*.ui"
+out = "src/ui/{stem}.h"
+cmd = "{uic} {in} -o {out}"
+
+[[build.post_steps]]
+name = "image"
+in = "target/{profile}/boot/*.bin"
+out = "/tmp/image/os-{version}.img"
+cmd = "dd if=/dev/zero of={out} bs=1M count=8"
+```
+
+Step notes:
+- `in` supports glob patterns.
+- If `in` expands to multiple files, `out` must include `{stem}`.
+- Steps run only when inputs are newer than outputs.
+- Variables: `{in}`, `{out}`, `{stem}`, `{cflags}`, `{uic}`, `{moc}`, `{rcc}`, `{profile}`,
+  `{version}`, `{version_major}`, `{version_minor}`, `{version_patch}`, `{version_suffix}`, `{version_suffix_dash}`.
+
+`build.clean` supports `{profile}` and version placeholders (`{version}`, `{version_major}`, ...).
+
+### Profile overrides
+
+Profile tables inherit all values from `[build]`. Any field present in the profile table replaces the base value.
+Array fields (like `cflags`/`ldflags`) are appended to the base array.
+
+Target tables override profile and base settings for specific targets. Full inheritance order:
+1. `[build.<target>.<profile>]`
+2. `[build.<profile>.<target>]`
+3. `[build.<target>]`
+4. `[build.<profile>]`
+5. `[build]`
+
+If custom `cflags` are set (non-empty), default compiler flags are disabled.
+
+```toml
+[build.debug]
+cflags = ["-g3"]
+
+[build.release]
+cflags = ["-O3"]
+ldflags = ["-s"]
+
+# Target-specific overrides (applied after profile)
+[build.linux]
+compiler = "gcc"
+cflags = ["-march=x86_64"]
+
+[build.macos]
+compiler = "clang"
+cflags = ["-arch", "x86_64"]
+
+# Full inheritance example
+[build.linux.release]
+cflags = ["-O3", "-march=native"]  # Overrides profile and base
+
+[build.release.linux]
+ldflags = ["-static"]  # Alternative order
+
+[build.windows.debug]
+compiler = "x86_64-w64-mingw32-gcc"
+cflags = []  # Empty to disable defaults
+
+[build.release]
+inherit = false  # No inheritance, only explicit settings
+```
+
+## Toolchain section
+
+```toml
+[toolchain]
+cc = "clang"
+cxx = "clang++"
+as = "as"
+ar = "ar"
+ld = "ld"
+uic = "uic"
+moc = "moc"
+rcc = "rcc"
+```
+
+## Behavior notes
+
+- Compiler backend is selected by compiler string (`gcc`, `clang`, `cl`, `clang-cl`).
+- Empty or unknown compiler value falls back to clang-like build path.
+- `run` is not allowed for library kinds (`staticlib`, `sharedlib`).

docs/configuration/dcr.toml-overview.md

@@ -0,0 +1,71 @@
+# dcr.toml overview
+
+`dcr.toml` is the main project file used by DCR.
+
+## Minimal generated template
+
+```toml
+[package]
+name = "hello"
+version = "0.1.0"
+
+[build]
+language = "c"
+standard = "c11"
+compiler = "clang"
+kind = "bin"
+
+[dependencies]
+```
+
+`dcr new` and `dcr init` generate this structure automatically.
+
+## Required sections
+
+- `[package]`
+- `[build]`
+- `[dependencies]`
+
+Workspace-only root:
+- `[workspace]` can be added to a normal root config to define members and dependency order.
+- Root config still requires `[package]`, `[build]`, and `[dependencies]`.
+
+## Required keys
+
+- `package.name`
+- `package.version`
+- `build.language`
+- `build.standard`
+- `build.compiler`
+- `build.kind`
+
+`build.kind` must be either `bin`, `staticlib`, or `sharedlib`.
+
+## Optional keys
+
+- `build.inherit`
+- `build.targets`
+- `build.target`
+- `build.platform`
+- `build.cflags`
+- `build.ldflags`
+- `build.exclude`
+- `build.include`
+- `build.roots`
+- `build.src_disable`
+- `build.pkg_config`
+- `build.steps`
+- `build.post_steps`
+- `build.generated`
+- `build.expect`
+- `build.clean`
+- `build.debug`
+- `build.release`
+- `build.<target>` (target-specific overrides)
+- dependency fields (`include`, `lib`, `libs`, `system`)
+- `[toolchain]` overrides (`cc`, `cxx`, `as`, `ar`, `ld`, `uic`, `moc`, `rcc`)
+- `[toolchain.<target>]` (target-specific toolchain)
+- `[workspace]` members
+- `[workspace.<target>]` (target-specific workspace)
+- `[run]` overrides (`cmd`)
+- `[run.<target>]` (target-specific run)

docs/configuration/dependencies-section.md

@@ -0,0 +1,30 @@
+# Dependencies section
+
+DCR currently supports path dependencies.
+
+## Example
+
+```toml
+[dependencies]
+frecli = { path = "./lib/frecli", include = ["."], lib = ["."], libs = ["frecli"] }
+```
+
+## Supported fields per dependency
+
+- `path` (string, required): absolute path or path relative to project root.
+- `include` (string array, optional): include directories inside dependency.
+- `lib` (string array, optional): library directories inside dependency.
+- `libs` (string array, optional): library names for linker.
+- `system` (bool, optional): currently `system = true` is rejected.
+
+## Defaults
+
+- If `include` is omitted, DCR tries `<dep>/include`.
+- If `lib` is omitted, DCR tries `<dep>/lib`, then `<dep>/lib64`.
+- If `libs` is omitted, dependency key name is used.
+
+## Validation
+
+- Dependency value must be a TOML table.
+- `path` is mandatory.
+- `include`/`lib`/`libs` must be arrays of strings if provided.

docs/configuration/package-section.md

@@ -0,0 +1,20 @@
+# Package section
+
+## Schema
+
+```toml
+[package]
+name = "my-app"
+version = "0.1.0"
+```
+
+## Fields
+
+- `name` (string, required): used as output artifact base name.
+- `version` (string, required): used in `dcr.lock` project entry.
+
+## Notes
+
+- Empty `name` or `version` makes config invalid.
+- `dcr new` sets `name` from the passed project name.
+- `dcr init` sets `name` from current directory name.

docs/dependencies-and-build/compilers-and-linking.md

@@ -0,0 +1,78 @@
+# Compilers & linking
+
+## Compiler backend selection
+
+DCR picks a backend from `build.compiler`:
+
+- contains `clang-cl` -> MSVC backend
+- equals `as` or contains `gas` -> GAS backend (standalone assembler)
+- contains `gcc` or `g++` -> GCC backend
+- contains `clang` or `clang++` -> Clang backend
+- equals `cl` or contains `msvc` -> MSVC backend
+- contains `nasm` -> NASM backend
+- otherwise -> Clang backend fallback
+
+## Compilation model
+
+- Source files are found recursively in `src/` based on `build.language`.
+- `build.roots` and `build.src_disable` can replace the default `src/` root.
+- Mixed language builds use arrays, for example `build.language = ["c", "asm"]`.
+- Each source is compiled to `target/<target>/<profile>/obj/<relative-path>.o` (`.obj` on MSVC, where `<target>` is `native` or target triple).
+- Recompile happens when source mtime is newer than object mtime.
+- `build.exclude` removes paths from source/header collection; `build.include` re-allows matching paths and has priority over `exclude`.
+
+## Default build flags
+
+These flags are applied automatically based on profile and compiler backend.
+
+GCC/Clang:
+
+- `debug`: `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDCR_DEBUG`
+- `release`: `-O3 -DNDEBUG`
+
+MSVC:
+
+- `debug`: `/Od /Zi /W4 /DDCR_DEBUG /Oy-`
+- `release`: `/O2 /DNDEBUG`
+
+Note: If custom `cflags` are set in `dcr.toml`, default profile flags are disabled to allow full control.
+
+## Platform hint
+
+If `build.platform` is set, DCR passes it as an architecture hint:
+
+- GCC/Clang: `-march=<platform>`
+- MSVC: maps to `/arch:*` for known values (`x86`, `i386`, `i486`, `i586`, `i686`, `sse2`, `avx`, `avx2`)
+
+## Toolchain overrides
+
+If `[toolchain]` is set, DCR uses its values to override compiler/linker tools:
+
+- `cc`, `cxx`, `as` override compilers for C/C++/ASM
+- `ar` overrides the archiver (used for `staticlib`)
+- `ld` overrides the linker (used by GCC/Clang/NASM/GAS backends)
+- `uic`, `moc`, `rcc` override Qt tools used in `build.steps`
+
+Environment overrides (highest priority):
+- `DCR_COMPILER` (all languages)
+- `DCR_CC`, `DCR_CXX`, `DCR_AS`, `DCR_AR`, `DCR_LD`
+- `DCR_DEBUG` enables verbose build logging
+
+## Linking
+
+For `kind = "bin"`:
+
+- Object files are linked into executable artifact.
+- Dependency lib dirs and library names are passed to linker.
+- `build.ldflags` are appended to link command.
+
+For `kind = "staticlib"`:
+
+- Linux/macOS (GCC/Clang): `ar rcs` creates `.a` archive.
+- Windows (MSVC): `lib` creates `.lib` archive.
+
+For `kind = "sharedlib"`:
+
+- Linux (GCC/Clang): `-shared` with output `.so`.
+- macOS (Clang): `-dynamiclib` with output `.dylib`.
+- Windows (MSVC): `/LD` with output `.dll`.

docs/dependencies-and-build/cross-compilation.md

@@ -0,0 +1,201 @@
+# Cross-compilation and Targets
+
+DCR supports cross-compilation to different platforms using the `--target` flag. This allows building your project for architectures and operating systems different from the host.
+
+## Basic Usage
+
+```bash
+# Build for a specific target
+dcr build --target x86_64-unknown-linux-gnu --release
+
+# Short names for common platforms
+dcr build --target linux --release    # x86_64-unknown-linux-gnu
+dcr build --target macos --release    # x86_64-apple-darwin
+dcr build --target windows --release  # x86_64-pc-windows-msvc
+
+# Run for a specific target
+dcr run --target linux --release
+```
+
+## Supported Targets
+
+### Short Names
+- `linux` → `x86_64-unknown-linux-gnu`
+- `macos` → `x86_64-apple-darwin`
+- `windows` → `x86_64-pc-windows-msvc`
+
+### Full Target Triples
+DCR supports any valid target triple in the format `<arch>-<vendor>-<os>-<abi>`. Common examples:
+- `x86_64-unknown-linux-gnu`
+- `aarch64-linux-gnu`
+- `x86_64-apple-darwin`
+- `aarch64-apple-darwin`
+- `x86_64-pc-windows-msvc`
+- `i686-pc-windows-gnu`
+
+## Configuration
+
+### Multiple Targets
+
+Configure multiple targets to build simultaneously:
+
+```toml
+[build.targets]
+targets = ["linux", "macos", "windows"]
+
+# Or per profile
+[build.release.targets]
+targets = ["linux", "macos"]
+```
+
+If no `--target` is specified, DCR builds for all targets in `build.targets` (or native if empty).
+
+### Target-Specific Settings
+
+Override settings for specific targets:
+
+```toml
+[build.linux]
+compiler = "gcc"
+cflags = ["-Wall", "-O2"]
+
+[build.macos]
+compiler = "clang"
+cflags = ["-Wall", "-O2", "-arch", "x86_64"]
+
+[build.windows]
+compiler = "x86_64-w64-mingw32-gcc"
+ldflags = ["-static"]
+```
+
+### Target-Specific Toolchain
+
+Configure toolchain per target:
+
+```toml
+[toolchain.linux]
+cc = "gcc"
+ld = "ld"
+
+[toolchain.macos]
+cc = "clang"
+ld = "ld"
+
+[toolchain.windows]
+cc = "x86_64-w64-mingw32-gcc"
+ld = "x86_64-w64-mingw32-ld"
+```
+
+### Target-Specific Run Commands
+
+Use custom run commands per target:
+
+```toml
+[run.linux]
+cmd = "./target/linux/release/myapp"
+
+[run.macos]
+cmd = "open ./target/macos/release/myapp.app"
+
+[run.windows]
+cmd = "wine ./target/windows/release/myapp.exe"
+```
+
+## Workspace and Dependencies Inheritance
+
+Workspace and dependencies sections also support target/profile inheritance:
+
+```toml
+[workspace.linux]
+members = [
+  { name = "lib1", path = "libs/lib1" },
+]
+
+[dependencies.linux]
+sdl2 = { system = true, include = ["/usr/include/SDL2"] }
+
+[dependencies.windows]
+sdl2 = { system = true, include = ["C:/SDL2/include"] }
+```
+
+Order: `workspace.target.profile` → `workspace.profile.target` → `workspace.target` → `workspace.profile` → `workspace`.
+
+Add `inherit = false` to disable inheritance in any section.
+
+Settings are applied in order:
+1. `[build.<target>]`
+2. `[build.<profile>]`
+3. `[build]`
+
+### Toolchain Configuration
+
+For cross-compilation, configure toolchains:
+
+```toml
+[toolchain]
+cc = "aarch64-linux-gnu-gcc"
+cxx = "aarch64-linux-gnu-g++"
+ar = "aarch64-linux-gnu-ar"
+ld = "aarch64-linux-gnu-ld"
+```
+
+## Output Structure
+
+Build outputs are organized by target:
+
+```
+target/
+├── native/
+│   ├── debug/
+│   └── release/
+├── x86_64-unknown-linux-gnu/
+│   ├── debug/
+│   └── release/
+└── aarch64-linux-gnu/
+    ├── debug/
+    └── release/
+```
+
+## Requirements
+
+- Cross-compilation requires appropriate toolchains installed (e.g., `aarch64-linux-gnu-gcc` on Arch Linux).
+- For Windows targets on Linux, install MinGW: `pacman -S mingw-w64-gcc`.
+- For macOS targets on Linux, use `osxcross` or similar.
+
+## Examples
+
+### ARM Linux Build
+
+```bash
+# Install toolchain (Arch Linux)
+pacman -S aarch64-linux-gnu-gcc
+
+# Configure
+echo '[build.aarch64-linux-gnu]
+compiler = "aarch64-linux-gnu-gcc"' >> dcr.toml
+
+# Build
+dcr build --target aarch64-linux-gnu --release
+```
+
+### Windows Build on Linux
+
+```bash
+# Install toolchain (Arch Linux)
+pacman -S mingw-w64-gcc
+
+# Configure
+echo '[build.windows]
+compiler = "x86_64-w64-mingw32-gcc"' >> dcr.toml
+
+# Build
+dcr build --target windows --release
+```
+
+## Troubleshooting
+
+- **Toolchain not found**: Ensure the compiler is installed and in PATH, or configure `[toolchain]` in `dcr.toml`. For Arch Linux: `pacman -S aarch64-linux-gnu-gcc` for ARM, `pacman -S mingw-w64-gcc` for Windows cross-compilation.
+- **Linking errors**: Check `ldflags` and library paths for cross-compilation.
+- **Header issues**: Include paths may differ; use target-specific `cflags`.
+
+For more help, see [Troubleshooting map](troubleshooting-map.md).

docs/dependencies-and-build/dependency-format.md

@@ -0,0 +1,26 @@
+# Dependency format
+
+Dependencies are defined in `dcr.toml` under `[dependencies]`.
+
+## Full example
+
+```toml
+[dependencies]
+fmt = { path = "./third_party/fmt", include = ["include"], lib = ["lib"], libs = ["fmt"] }
+```
+
+## Field reference
+
+- `path`: required dependency root path.
+- `include`: optional include subpaths (absolute or relative to dep root).
+- `lib`: optional library subpaths (absolute or relative to dep root).
+- `libs`: optional linker library names.
+
+## Common valid compact form
+
+```toml
+[dependencies]
+mylib = { path = "./libs/mylib" }
+```
+
+In this form DCR will try defaults for include/lib dirs and use `mylib` as the linker library name.

docs/dependencies-and-build/local-dependencies.md

@@ -0,0 +1,24 @@
+# Local dependencies
+
+## Resolution flow during build
+
+For each dependency in `[dependencies]`, DCR:
+
+1. Resolves `path` (absolute or project-relative).
+2. Resolves include dirs (`include` or default `include`).
+3. Resolves lib dirs (`lib` or defaults `lib`, `lib64`).
+4. Resolves link libs (`libs` or dependency name).
+5. Synchronizes dependency files to `target/<profile>/deps/<dep-name>/`.
+6. Adds include/lib/link options to compile/link commands.
+
+### Profile placeholders
+
+`path`, `include`, and `lib` entries may use `{profile}` which expands to the active profile
+(`debug` or `release`).
+
+## Failure cases
+
+- Dependency path is missing or not a directory.
+- No valid include/lib directories were found.
+- Any configured include/lib path does not exist.
+- Invalid field types in dependency config.

docs/dependencies-and-build/target-directory.md

@@ -0,0 +1,23 @@
+# Target directory
+
+By default, DCR writes final artifacts to `target/<target>/<profile>/` (where `<target>` is `native` or target triple).
+
+You can override this with `build.target`:
+
+```toml
+[build]
+target = "./dist"
+```
+
+## Behavior
+
+- Binary mode:
+  - Linux/macOS: `<target>/<name>`
+  - Windows: `<target>/<name>.exe`
+- Static library mode:
+  - Linux/macOS: `<target>/lib<name>.a`
+  - Windows: `<target>/<name>.lib`
+
+## Important detail
+
+`build.target` changes only the final artifact location. Object cache and dependency sync directories still use `target/<target>/<profile>/...`.

docs/dependencies-and-build/versioning-and-lock-file.md

@@ -0,0 +1,32 @@
+# Versioning & lock file
+
+DCR generates `dcr.lock` when dependency resolution succeeds and at least one dependency exists.
+
+## What is stored
+
+- Project entry (`name`, `version`, dependency names).
+- One entry per resolved dependency:
+  - `name`
+  - `version` (from dependency `dcr.toml`, fallback `0.0.0`)
+  - `source` (`path+...`)
+  - `checksum` (SHA-256 over dependency files, excluding nested `target/`).
+
+## Example shape
+
+```toml
+[[package]]
+name = "my-app"
+version = "0.1.0"
+dependencies = ["fmt"]
+
+[[package]]
+name = "fmt"
+version = "1.2.3"
+source = "path+./third_party/fmt"
+checksum = "..."
+```
+
+## Notes
+
+- `dcr.lock` is rewritten on successful dependency resolution.
+- If `[dependencies]` is empty, lock generation is skipped.

docs/getting-started/build-and-run.md

@@ -0,0 +1,57 @@
+# Build and run
+
+## Build
+
+Debug (default):
+
+```sh
+dcr build
+# or
+dcr build --debug
+dcr build --target linux --debug
+dcr build --debug --clean
+```
+
+Release:
+
+```sh
+dcr build --release
+dcr build --target windows --release
+```
+
+## Run
+
+```sh
+dcr run
+# or
+dcr run --target macos
+dcr run --release
+dcr run --target linux --release
+dcr run --release --force
+```
+
+`dcr run` first builds, then launches the produced binary.
+
+## Clean artifacts
+
+```sh
+dcr clean
+```
+
+Profile-only cleanup:
+
+```sh
+dcr clean --debug
+dcr clean --release
+dcr clean --all
+dcr clean --release --all
+```
+
+## Notes
+
+- `run` is unavailable for `build.kind = "staticlib"` and `build.kind = "sharedlib"`.
+- Build profile flag (`--debug` / `--release`) can be passed in any argument position.
+- Unknown profile flags produce an error.
+- In workspace root, `clean --all` cleans all member projects.
+- `--target` builds/runs for specified target (short names: `linux`, `macos`, `windows`).
+- `--clean` for `build`/`run` removes `target/<target>/<profile>` and paths from `build.clean`.

docs/getting-started/create-your-first-project.md

@@ -0,0 +1,41 @@
+# Create your first project
+
+## Create in a new folder
+
+```sh
+dcr new hello
+cd hello
+```
+
+This creates:
+
+```text
+hello/
+- dcr.toml
+- src/
+- - main.c
+```
+
+## Or initialize current folder
+
+```sh
+mkdir hello
+cd hello
+dcr init
+```
+
+`dcr init` requires the current directory to be empty.
+
+## Next steps
+
+Build and run:
+
+```sh
+dcr run
+```
+
+Release build/run:
+
+```sh
+dcr run --release
+```

docs/getting-started/installation.md

@@ -0,0 +1,56 @@
+# Installation
+
+## Option 1: Install via script
+
+### Linux/macOS
+
+```sh
+curl -fsSL https://dcr.dexoron.su/install.sh | bash
+```
+
+Alternative with `wget`:
+
+```sh
+wget -qO- https://dcr.dexoron.su/install.sh | bash
+```
+
+### Windows (PowerShell)
+
+```powershell
+powershell -ExecutionPolicy ByPass -c "irm https://dcr.dexoron.su/install.ps1 | iex"
+```
+
+## Option 2: Build from source
+
+```sh
+git clone https://github.com/dexoron/dcr.git
+cd dcr
+cargo build --release
+mkdir -p ~/.local/bin
+ln -sf "$PWD/target/release/dcr" ~/.local/bin/dcr
+```
+
+## Option 3: Arch Linux (AUR)
+
+```sh
+yay -S dcr
+```
+
+(You can also use `paru` or other AUR helpers.)
+
+## Verify installation
+
+```sh
+dcr --version
+```
+
+Expected format:
+
+```text
+dcr <version> (<target>)
+```
+
+## Update policy
+
+- If DCR was installed from GitHub releases, scripts, or manual build: use `dcr --update`.
+- If DCR is managed by `pacman/AUR`: update via package manager. On Linux, `dcr --update` detects pacman-owned binaries and prints a package-manager hint.

docs/getting-started/project-structure.md

@@ -0,0 +1,40 @@
+# Project structure
+
+## Minimal project
+
+```text
+project/
+- dcr.toml
+- src/
+- - main.c
+```
+
+## Typical generated/optional files
+
+```text
+project/
+- dcr.toml
+- dcr.lock
+- src/
+- - ... source files ...
+- target/
+- - debug/
+- - - obj/
+- - - deps/
+- - release/
+- - - obj/
+- - - deps/
+```
+
+## Meaning
+
+- `dcr.toml`: main project configuration.
+- `dcr.lock`: generated lock file for resolved path dependencies.
+- `src/`: recursively scanned source directory.
+- `target/<target>/<profile>/obj/`: cached object files for incremental rebuild (where `<target>` is `native` or target triple).
+- `target/<target>/<profile>/deps/`: synchronized copies of path dependencies.
+- `target/<target>/<profile>/<name>` (or `.exe` on Windows): output for `kind = "bin"`.
+- `target/<target>/<profile>/lib<name>.a` (or `<name>.lib` on Windows): output for `kind = "staticlib"`.
+- `target/<target>/<profile>/lib<name>.so` (or `.dylib` on macOS, `<name>.dll` on Windows): output for `kind = "sharedlib"`.
+
+If `build.target` is set, the final artifact is written to that custom directory, while object cache still stays in `target/<target>/<profile>/obj`.

docs/reference-and-help/cli-reference.md

@@ -0,0 +1,28 @@
+# CLI reference
+
+## Command list
+
+```text
+dcr new <name>
+dcr init
+dcr build [--debug|--release]
+dcr run [--debug|--release]
+dcr clean [--debug|--release] [--all]
+dcr gen <subcommand>
+dcr --help
+dcr --version
+dcr --update
+```
+
+## Notes on argument parsing
+
+- `build`/`run` parse flags in any order (`--debug|--release`, `--force`, `--clean`) and reject duplicates.
+- `new` requires exactly one argument.
+- `init` and `--update` do not accept extra arguments.
+- `clean` accepts `--debug|--release` and optional `--all`.
+- `gen` supports `project-info`, `compile-commands`, `vscode`, `clion`.
+
+## Exit behavior overview
+
+- Successful command execution returns `0`.
+- Validation/build/runtime failures return non-zero status.

docs/reference-and-help/config-reference.md

@@ -0,0 +1,103 @@
+# Config reference
+
+## Full schema
+
+```toml
+[package]
+name = "string"      # required
+version = "string"   # required
+
+[build]
+language = "c|c++|cpp|cxx|asm"     # required (string or array)
+standard = "string"            # required
+compiler = "string"            # required
+kind = "bin|staticlib|sharedlib"         # required
+target = "string"              # optional
+platform = "string"            # optional
+cflags = ["string", "..."]     # optional
+ldflags = ["string", "..."]    # optional
+exclude = ["string", "..."]    # optional
+include = ["string", "..."]    # optional
+roots = ["string", "..."]      # optional
+src_disable = false            # optional
+pkg_config = ["string", "..."] # optional
+generated = ["string", "..."]  # optional
+expect = ["string", "..."]     # optional
+clean = ["string", "..."]      # optional
+
+[[build.steps]]
+name = "string"
+in = "glob"
+out = "path or glob"
+cmd = "string"
+
+[[build.post_steps]]
+name = "string"
+in = "glob"
+out = "path or glob"
+cmd = "string"
+
+# Inline array form (equivalent to [[build.steps]] / [[build.post_steps]])
+steps = [
+  { name = "string", in = "glob", out = "path or glob", cmd = "string" },
+]
+post_steps = [
+    { name = "string", in = "glob", out = "path or glob", cmd = "string" },
+]
+
+[build.debug]
+cflags = ["string", "..."]     # optional
+ldflags = ["string", "..."]    # optional
+
+[build.release]
+cflags = ["string", "..."]     # optional
+ldflags = ["string", "..."]    # optional
+
+[toolchain]
+cc = "string"   # optional
+cxx = "string"  # optional
+as = "string"   # optional
+ar = "string"   # optional
+ld = "string"   # optional
+uic = "string"  # optional
+moc = "string"  # optional
+rcc = "string"  # optional
+
+[run]
+cmd = "string"  # optional
+
+[workspace]
+name = { path = "string", deps = ["string", "..."] }
+
+[dependencies]
+name = {
+  path = "string",              # required for each dependency
+  include = ["string", "..."],  # optional
+  lib = ["string", "..."],      # optional
+  libs = ["string", "..."],     # optional
+}
+```
+
+## Validation rules
+
+- `[package]`, `[build]`, `[dependencies]` must exist.
+- Required string fields must be non-empty.
+- `build.kind` must be `bin`, `staticlib`, or `sharedlib`.
+- Dependency fields `include/lib/libs` must be string arrays when provided.
+- `build.exclude`/`build.include` must be string arrays when provided.
+- `build.roots` must be a string array when provided.
+- `build.src_disable` must be boolean when provided.
+- `build.clean`/`build.generated`/`build.pkg_config`/`build.expect` must be string arrays when provided.
+- `build.debug`/`build.release` must be tables; their `cflags`/`ldflags` must be string arrays.
+- `build.steps`/`build.post_steps` entries must include `name`, `in`, `out`, `cmd`.
+- `build.language` may be a string or array (for example `["c", "c++", "asm"]`).
+- `[build.<profile>]` tables inherit all base values and override any fields they specify.
+  Array fields (like `cflags`/`ldflags`) are appended to the base array.
+
+## Generated defaults (`dcr new` / `dcr init`)
+
+- `package.version = "0.1.0"`
+- `build.language = "c"`
+- `build.standard = "c11"`
+- `build.compiler = "clang"`
+- `build.kind = "bin"`

docs/reference-and-help/contributing-and-bug-reports.md

@@ -0,0 +1,34 @@
+# Contributing & Bug reports
+
+## Contribution workflow
+
+1. Fork `dexoron/dcr` (and `dexoron/dcr-site` if docs website changes are needed).
+2. Make focused changes.
+3. Run checks locally:
+
+```bash
+cargo fmt --all
+cargo clippy --all-targets --all-features -- -D warnings
+cargo check
+```
+
+4. Open a PR with short rationale and behavior impact.
+5. Update docs when CLI behavior changes.
+
+## Bug report checklist
+
+Include:
+
+1. DCR version (`dcr --version`).
+2. OS and compiler/toolchain version.
+3. Reproduction steps.
+4. Expected result.
+5. Actual result and full error output.
+6. Minimal reproducible project.
+
+## Where to report
+
+Use GitHub Issues in the relevant repository:
+
+- <https://github.com/dexoron/dcr>
+- <https://github.com/dexoron/dcr-site>

docs/reference-and-help/faq.md

@@ -0,0 +1,35 @@
+# FAQ
+
+## What commands are available?
+
+`new`, `init`, `build`, `run`, `clean`, `gen`, `--help`, `--version`, `--update`.
+
+## Is `dcr.toml` mandatory?
+
+Yes, for `build`, `run`, and `clean`.
+
+## What source files are compiled?
+
+DCR scans `src/` recursively:
+
+- for C: `*.c`
+- for C++: `*.cpp`, `*.cxx`, `*.cc`
+
+## Can I switch compiler?
+
+Yes. Set `build.compiler` in `dcr.toml` (for example `gcc`, `clang`, `cl`, `clang-cl`).
+
+## How does incremental rebuild work?
+
+It compares source file mtime with object file mtime.
+Header dependencies are tracked too: if an included header changes (or disappears), rebuild is triggered.
+
+## What does `dcr run` do if build fails?
+
+It tries to run an existing binary from the selected profile; if none exists, it reports an error.
+
+## How do I update DCR?
+
+Use `dcr --update` for non-package-managed installs.
+
+If installed through pacman/AUR, update via package manager.

docs/reference-and-help/flags-and-environment.md

@@ -0,0 +1,48 @@
+# Flags & environment
+
+This page summarizes runtime flags and environment variables that affect DCR behavior.
+
+## Build/run flags
+
+Used with `dcr build` and `dcr run`:
+
+- `--debug`: select debug profile.
+- `--release`: select release profile.
+- `--force`: ignore incremental cache checks and rebuild.
+- `--clean`: remove `target/<profile>` and `build.clean` paths before build.
+
+Notes:
+
+- Flags can be passed in any order.
+- Duplicate profile flags are rejected.
+
+## Clean flags
+
+Used with `dcr clean`:
+
+- `--debug` / `--release`: clean only selected profile directory.
+- `--all`: in workspace root, also clean all members.
+
+## Environment variables
+
+Tool selection overrides:
+
+- `DCR_COMPILER` (all languages)
+- `DCR_CC`, `DCR_CXX`, `DCR_AS`, `DCR_AR`, `DCR_LD`
+
+Diagnostics:
+
+- `DCR_DEBUG=1` enables verbose build logging.
+
+## Quick examples
+
+```sh
+# Force full release rebuild
+dcr build --release --force
+
+# Clean before debug run
+dcr run --clean --debug
+
+# Use custom compiler from env
+DCR_CC=clang-18 dcr build --debug
+```

docs/reference-and-help/troubleshooting-map.md

@@ -0,0 +1,75 @@
+# Troubleshooting map
+
+Fast mapping from symptom to likely cause and first action.
+
+## `dcr.toml file not found`
+
+Likely cause:
+- you are outside project root (or member root).
+
+First action:
+```sh
+pwd
+ls
+```
+Run DCR from directory that contains `dcr.toml`.
+
+## `Invalid config: missing [package]` / `missing [build]`
+
+Likely cause:
+- incomplete config in root project.
+
+First action:
+- ensure root `dcr.toml` includes `[package]`, `[build]`, and `[dependencies]`.
+- for workspace setups, keep these sections in root and add `[workspace]` additionally.
+
+## `Unknown build flag` or profile-flag errors
+
+Likely cause:
+- typo in flag or duplicate profile flag.
+
+First action:
+```sh
+dcr --help
+```
+Use only supported flags and at most one of `--debug` / `--release`.
+
+## Dependency include/lib path errors
+
+Likely cause:
+- path in `[dependencies]` does not exist.
+
+First action:
+- verify `path`, `include`, `lib` values.
+- if using profile placeholders, confirm expanded paths exist for selected profile.
+
+## `Cannot run library build`
+
+Likely cause:
+- `build.kind` is `staticlib` or `sharedlib`.
+
+First action:
+- switch `build.kind` to `bin`, or set `[run].cmd` if you intentionally need custom run command.
+
+## Build succeeds but output is stale
+
+Likely cause:
+- stale artifacts or generated files from previous runs.
+
+First action:
+```sh
+dcr clean --all
+dcr build --force
+```
+
+## `dcr --update` suggests package manager update
+
+Likely cause:
+- DCR binary is managed by pacman/AUR.
+
+First action:
+```sh
+yay -Syu dcr
+# or
+paru -Syu dcr
+```

docs/reference-and-help/workspace-guide.md

@@ -0,0 +1,53 @@
+# Workspace guide
+
+`[workspace]` lets you build related DCR projects in dependency order from one root.
+
+## Important rule
+
+Workspace root still needs a valid root project config:
+
+- `[package]`
+- `[build]`
+- `[dependencies]`
+
+`[workspace]` augments that root config; it does not replace required root sections.
+
+## Minimal example
+
+```toml
+[package]
+name = "root-app"
+version = "0.1.0"
+
+[build]
+language = "c"
+standard = "c11"
+compiler = "clang"
+kind = "bin"
+
+[dependencies]
+
+[workspace]
+core = { path = "./modules/core", deps = [] }
+net = { path = "./modules/net", deps = ["core"] }
+app = { path = "./modules/app", deps = ["core", "net"] }
+```
+
+Each member path must point to a directory containing its own `dcr.toml`.
+
+## Build behavior
+
+- Running `dcr build` in workspace root builds members in topological dependency order, then builds the root project.
+
+- Running `dcr clean --all` in workspace root cleans all members too.
+
+- `dcr gen` in workspace root includes root + members in generated outputs.
+
+## Common errors
+
+- `workspace.<name>.path does not contain dcr.toml`:
+  member path is wrong or config is missing.
+- `workspace dependency '<name>' not found`:
+  `deps` references unknown member.
+- `workspace dependency cycle at <name>`:
+  cyclic dependencies in member graph.

src/cli/clean.rs

@@ -1,63 +1,230 @@
 use crate::config::flags;
-use crate::utils::fs::check_dir;
+use crate::core::config::Config;
+use crate::core::workspace::parse_workspace;
+use crate::utils::fs::{check_dir, find_project_root};
 use crate::utils::log::{error, warn};
 use crate::utils::text::{BOLD_GREEN, colored};
+use glob::glob;
 use std::fs;
+use std::path::Path;
 
 pub fn clean(args: &[String]) -> i32 {
-    let project_name = std::env::current_dir()
-        .ok()
-        .and_then(|p| p.file_name().map(|v| v.to_string_lossy().to_string()))
-        .unwrap_or_else(|| "project".to_string());
-    let items = check_dir(None).unwrap_or_default();
-
-    if args.len() > 1 {
-        error("Unknown argument");
-        return 1;
-    }
-    if !items.contains(&"dcr.toml".to_string()) {
-        error("dcr.toml file not found");
-        return 1;
-    }
-
-    println!(
-        "    Cleaning project `{}`",
-        colored(&project_name, BOLD_GREEN)
-    );
-    if !items.contains(&"target".to_string()) {
-        warn("Directory target not found");
-        return 1;
-    }
-
-    if let Some(arg) = args.first() {
-        let mut profile = arg.clone();
-        if profile.starts_with("--") {
-            profile = profile.trim_start_matches("--").to_string();
-        }
-        if flags(&profile).is_none() {
-            error("Unknown profile");
+    let start_dir = match std::env::current_dir() {
+        Ok(dir) => dir,
+        Err(_) => {
+            error("Failed to determine current directory");
             return 1;
         }
-
-        let target_items = check_dir(Some("target")).unwrap_or_default();
-        if !target_items.contains(&profile) {
-            warn(&format!("Directory target/{profile} not found"));
+    };
+    let root = match find_project_root(&start_dir) {
+        Ok(Some(dir)) => dir,
+        Ok(None) => {
+            error("dcr.toml file not found");
             return 1;
         }
+        Err(_) => {
+            error("Failed to find project root");
+            return 1;
+        }
+    };
+    let flags = match parse_clean_flags(args) {
+        Ok(v) => v,
+        Err(msg) => {
+            error(&msg);
+            return 1;
+        }
+    };
 
-        println!("    Profile: {}", colored(&profile, BOLD_GREEN));
-        let _ = fs::remove_dir_all(format!("target/{profile}"));
-        println!(
-            "{} Removed directory target/{profile}",
-            colored("\n    ✔", BOLD_GREEN)
-        );
-        return 0;
+    match with_dir(&root, || clean_from_root(&root, &flags)) {
+        Ok(()) => 0,
+        Err(msg) => {
+            error(&msg);
+            1
+        }
+    }
+}
+
+struct CleanFlags {
+    profile: Option<String>,
+    all: bool,
+}
+
+fn parse_clean_flags(args: &[String]) -> Result<CleanFlags, String> {
+    let mut profile: Option<String> = None;
+    let mut all = false;
+    for arg in args {
+        if arg == "--all" {
+            all = true;
+            continue;
+        }
+        if arg.starts_with("--") {
+            let candidate = arg.trim_start_matches("--").to_string();
+            if flags(&candidate).is_some() {
+                if profile.is_some() {
+                    return Err("Duplicate profile flag".to_string());
+                }
+                profile = Some(candidate);
+                continue;
+            }
+        }
+        return Err("Unknown argument".to_string());
+    }
+    Ok(CleanFlags { profile, all })
+}
+
+fn clean_from_root(root: &Path, flags: &CleanFlags) -> Result<(), String> {
+    let config = Config::open("./dcr.toml").map_err(|err| err.to_string())?;
+    if flags.all
+        && let Some(workspace) = parse_workspace(
+            &config,
+            flags.profile.as_deref().unwrap_or("debug"),
+            None,
+            root,
+        )?
+    {
+        for member in &workspace.members {
+            clean_project_at(&member.path, flags.profile.as_deref())?;
+        }
+    }
+    clean_project_at(root, flags.profile.as_deref())
+}
+
+fn clean_project_at(project_root: &Path, profile: Option<&str>) -> Result<(), String> {
+    with_dir(project_root, || {
+        let config = Config::open("./dcr.toml").map_err(|err| err.to_string())?;
+        let project_name = std::env::current_dir()
+            .ok()
+            .and_then(|p| p.file_name().map(|v| v.to_string_lossy().to_string()))
+            .unwrap_or_else(|| "project".to_string());
+        let items = check_dir(None).map_err(|_| "Failed to read project directory".to_string())?;
+        if !items.contains(&"dcr.toml".to_string()) {
+            return Err("dcr.toml file not found".to_string());
+        }
+        println!(
+            "    Cleaning project `{}`",
+            colored(&project_name, BOLD_GREEN)
+        );
+        if let Some(profile) = profile {
+            let target_items = check_dir(Some("target")).unwrap_or_default();
+            if !target_items.contains(&profile.to_string()) {
+                warn(&format!("Directory target/{profile} not found"));
+            } else {
+                println!("    Profile: {}", colored(profile, BOLD_GREEN));
+                let _ = fs::remove_dir_all(format!("target/{profile}"));
+                println!(
+                    "{} Removed directory target/{profile}",
+                    colored("\n    ✔", BOLD_GREEN)
+                );
+            }
+            clean_custom_paths(&config, profile)?;
+            return Ok(());
+        }
+
+        if items.contains(&"target".to_string()) {
+            let _ = fs::remove_dir_all("target");
+            println!(
+                "{} Removed directory target",
+                colored("\n    ✔", BOLD_GREEN)
+            );
+        } else {
+            warn("Directory target not found");
+        }
+        clean_custom_paths(&config, "debug")?;
+        clean_custom_paths(&config, "release")?;
+        Ok(())
+    })
+}
+
+fn with_dir<F, T>(dir: &Path, f: F) -> Result<T, String>
+where
+    F: FnOnce() -> Result<T, String>,
+{
+    let prev = std::env::current_dir().map_err(|_| "Failed to get current dir".to_string())?;
+    std::env::set_current_dir(dir).map_err(|_| "Failed to change directory".to_string())?;
+    let result = f();
+    let _ = std::env::set_current_dir(prev);
+    result
+}
+
+fn clean_custom_paths(config: &Config, profile: &str) -> Result<(), String> {
+    let patterns = match config.get("build.clean") {
+        Some(v) => v
+            .as_array()
+            .ok_or_else(|| "build.clean must be an array of strings".to_string())?
+            .iter()
+            .filter_map(|item| item.as_str())
+            .map(|s| {
+                let value = s.replace("{profile}", profile);
+                substitute_version_vars(&value, config)
+            })
+            .collect::<Vec<String>>(),
+        None => Vec::new(),
+    };
+    if patterns.is_empty() {
+        return Ok(());
+    }
+    for pattern in patterns {
+        for entry in glob(&pattern).map_err(|err| format!("glob error: {err}"))? {
+            let path = entry.map_err(|err| format!("glob error: {err}"))?;
+            if path.is_dir() {
+                let _ = fs::remove_dir_all(&path);
+            } else if path.is_file() {
+                let _ = fs::remove_file(&path);
+            }
+        }
+    }
+    Ok(())
+}
+
+fn substitute_version_vars(value: &str, config: &Config) -> String {
+    let version = config
+        .get("package.version")
+        .and_then(|v| v.as_str())
+        .unwrap_or("");
+    let info = parse_version_info(version);
+    value
+        .replace("{version}", &info.full)
+        .replace("{version_major}", &info.major)
+        .replace("{version_minor}", &info.minor)
+        .replace("{version_patch}", &info.patch)
+        .replace("{version_suffix}", &info.suffix)
+        .replace("{version_suffix_dash}", &info.suffix_dash)
+}
+
+struct VersionInfo {
+    full: String,
+    major: String,
+    minor: String,
+    patch: String,
+    suffix: String,
+    suffix_dash: String,
+}
+
+fn parse_version_info(version: &str) -> VersionInfo {
+    let mut full = version.trim().to_string();
+    if full.is_empty() {
+        full = "0.0.0".to_string();
+    }
+    let full_clone = full.clone();
+    let (base, suffix) = match full_clone.split_once('-') {
+        Some((head, tail)) => (head, tail),
+        None => (full_clone.as_str(), ""),
+    };
+    let mut parts = base.split('.');
+    let major = parts.next().unwrap_or("0").to_string();
+    let minor = parts.next().unwrap_or("0").to_string();
+    let patch = parts.next().unwrap_or("0").to_string();
+    let suffix_dash = if suffix.is_empty() {
+        "".to_string()
+    } else {
+        format!("-{suffix}")
+    };
+    VersionInfo {
+        full,
+        major,
+        minor,
+        patch,
+        suffix: suffix.to_string(),
+        suffix_dash,
     }
-
-    let _ = fs::remove_dir_all("target");
-    println!(
-        "{} Removed directory target",
-        colored("\n    ✔", BOLD_GREEN)
-    );
-    0
 }

src/cli/flags.rs

@@ -0,0 +1,59 @@
+use crate::config::{PROFILE, flags};
+use crate::utils::log::warn;
+
+pub struct BuildRunFlags {
+    pub profile: String,
+    pub target: Option<String>,
+    pub force: bool,
+    pub clean: bool,
+}
+
+pub fn parse_build_run_flags(args: &[String]) -> Result<BuildRunFlags, i32> {
+    let mut profile = PROFILE.to_string();
+    let mut target = None;
+    let mut force = false;
+    let mut clean = false;
+    let mut iter = args.iter();
+
+    while let Some(arg) = iter.next() {
+        if !arg.starts_with("--") {
+            warn("Unknown argument");
+            return Err(1);
+        }
+        let candidate = arg.trim_start_matches("--");
+        if candidate == "force" {
+            force = true;
+            continue;
+        }
+        if candidate == "clean" {
+            clean = true;
+            continue;
+        }
+        if candidate == "target" {
+            if let Some(t) = iter.next() {
+                target = Some(t.clone());
+            } else {
+                warn("--target requires a value");
+                return Err(1);
+            }
+            continue;
+        }
+        if flags(candidate).is_some() {
+            if profile != PROFILE {
+                warn("Duplicate profile flag");
+                return Err(1);
+            }
+            profile = candidate.to_string();
+            continue;
+        }
+        warn("Unknown build flag");
+        return Err(1);
+    }
+
+    Ok(BuildRunFlags {
+        profile,
+        target,
+        force,
+        clean,
+    })
+}

src/cli/help.rs

@@ -12,15 +12,20 @@ pub fn help() -> i32 {
     println!("    init              Initialize the current directory as a project");
     println!("    build [--profile] Build the project (default: --debug)");
     println!("    run [--profile]   Build and run the project (default: --debug)");
+    println!("    test              Run project tests (alias: tests)");
     println!("    clean             Remove the target directory");
+    println!("    gen <subcommand>  Generate IDE integration files");
     printc("FLAGS:", BOLD_GREEN);
     println!("    --help            Show command help");
     println!("    --update          Update dcr to the latest version");
     println!("    --version         Show dcr version");
     println!();
     printc("OPTIONS:", BOLD_GREEN);
-    println!("    --debug           Build with debug profile");
-    println!("    --release         Build with release profile");
+    println!("    --debug           Use debug profile");
+    println!("    --release         Use release profile");
+    println!("    --force           Force rebuild (build/run)");
+    println!("    --clean           Clean before build (build/run)");
+    println!("    --all             Clean all workspace members (clean)");
     println!();
     printc("EXAMPLES:", BOLD_GREEN);
     printc("    dcr new hello", BOLD_CYAN);

src/cli/init.rs

@@ -65,7 +65,7 @@ pub fn init(args: &[String]) -> i32 {
         return 1;
     }
     println!(
-        "    {} Created file {}\n",
+        "    {} Created file {}",
         colored("✔", BOLD_GREEN),
         colored("src/main.c", BOLD_CYAN)
     );

src/cli/mod.rs

@@ -1,7 +1,10 @@
 pub mod build;
 pub mod clean;
 pub mod flag_update;
+pub mod flags;
+pub mod r#gen;
 pub mod help;
 pub mod init;
 pub mod new;
 pub mod run;
+pub mod test;

src/cli/new.rs

@@ -86,7 +86,7 @@ pub fn new(args: &[String]) -> i32 {
         return 1;
     }
     println!(
-        "    {} Created file {}\n",
+        "    {} Created file {}",
         colored("✔", BOLD_GREEN),
         colored("src/main.c", BOLD_CYAN)
     );

src/cli/run.rs

@@ -1,71 +1,203 @@
 use crate::cli::build::build;
-use crate::config::{PROFILE, flags};
+use crate::cli::flags::parse_build_run_flags;
 use crate::core::config::Config;
-use crate::utils::fs::check_dir;
-use crate::utils::log::{error, warn};
+use crate::core::runner::run_binary;
+use crate::utils::fs::find_project_root;
+use crate::utils::log::error;
 use crate::utils::text::{BOLD_GREEN, colored};
+use std::path::Path;
 use std::process::Command;
 
-pub fn run(args: &[String]) -> i32 {
-    let mut active_profile = PROFILE.to_string();
-
-    let items = check_dir(None).unwrap_or_default();
-    if !items.contains(&"dcr.toml".to_string()) {
-        error("dcr.toml file not found");
-        return 1;
+fn get_run_cmd(
+    config: &Config,
+    profile: &str,
+    target: Option<&str>,
+    version: &str,
+) -> Option<String> {
+    let base = config.get("run.cmd").and_then(|v| v.as_str());
+    let target_cmd = if let Some(t) = target {
+        let normalized_t = normalize_target_os(t);
+        config
+            .get(&format!("run.{}.cmd", normalized_t))
+            .or_else(|| config.get(&format!("run.{}.cmd", t)))
+            .and_then(|v| v.as_str())
+    } else {
+        None
+    };
+    let profile_cmd = config
+        .get(&format!("run.{}.cmd", profile))
+        .and_then(|v| v.as_str());
+    let cmd = target_cmd.or(profile_cmd).or(base)?;
+    let trimmed = cmd.trim();
+    if trimmed.is_empty() {
+        None
+    } else {
+        Some(substitute_run_vars(trimmed, profile, version))
     }
+}
 
-    let config = match Config::open("./dcr.toml") {
-        Ok(cfg) => cfg,
+fn normalize_target_os(s: &str) -> &str {
+    match s {
+        "linux" => "x86_64-unknown-linux-gnu",
+        "macos" => "x86_64-apple-darwin",
+        "windows" => "x86_64-pc-windows-msvc",
+        _ => s,
+    }
+}
+
+pub fn run(args: &[String]) -> i32 {
+    let start_dir = match std::env::current_dir() {
+        Ok(dir) => dir,
         Err(_) => {
+            error("Failed to determine current directory");
+            return 1;
+        }
+    };
+    let root = match find_project_root(&start_dir) {
+        Ok(Some(dir)) => dir,
+        Ok(None) => {
             error("dcr.toml file not found");
             return 1;
         }
+        Err(_) => {
+            error("Failed to find project root");
+            return 1;
+        }
+    };
+    let config = match with_dir(&root, || {
+        Config::open("./dcr.toml").map_err(|err| err.to_string())
+    }) {
+        Ok(cfg) => cfg,
+        Err(err) => {
+            error(&err);
+            return 1;
+        }
     };
     let project_name: &str = config
         .get("package.name")
         .and_then(|v| v.as_str())
         .unwrap_or("");
+    let build_kind = config
+        .get("build.kind")
+        .and_then(|v| v.as_str())
+        .unwrap_or("");
+    let target_dir = config
+        .get("build.target")
+        .and_then(|v| v.as_str())
+        .map(|s| s.trim())
+        .filter(|s| !s.is_empty());
 
-    if let Some(first_arg) = args.first() {
-        if first_arg.starts_with("--") {
-            let candidate = first_arg.trim_start_matches("--");
-            if flags(candidate).is_some() {
-                active_profile = candidate.to_string();
-            } else {
-                warn("Unknown build flag");
-                return 1;
-            }
-        } else {
-            warn("Unknown argument");
-            return 1;
-        }
+    let flags = match parse_build_run_flags(args) {
+        Ok(v) => v,
+        Err(_) => return 1,
+    };
+
+    let version = config
+        .get("package.version")
+        .and_then(|v| v.as_str())
+        .unwrap_or("");
+    let run_cmd = get_run_cmd(&config, &flags.profile, flags.target.as_deref(), version);
+
+    let kind = build_kind.trim();
+    if run_cmd.is_none() && (kind == "staticlib" || kind == "sharedlib") {
+        error("Cannot run library build");
+        return 1;
     }
-
     let build_status = build(args);
+    let bin_path = crate::platform::bin_path(&flags.profile, project_name, target_dir);
     if build_status == 0 {
-        println!(
-            "\n    {} target/{active_profile}/{project_name}",
-            colored("Running", BOLD_GREEN)
-        );
+        if let Some(cmd) = run_cmd {
+            println!("\n    {} {}", colored("Running", BOLD_GREEN), cmd);
+            println!("--------------------------------");
+            return run_shell(&cmd);
+        }
+        println!("\n    {} {}", colored("Running", BOLD_GREEN), bin_path);
         println!("--------------------------------");
-        return Command::new(format!("./target/{active_profile}/{project_name}"))
-            .status()
-            .map(|status| status.code().unwrap_or(1))
-            .unwrap_or(1);
+        return run_binary(project_name, &flags.profile, target_dir);
     }
 
-    if check_dir(Some(&format!("target/{active_profile}")))
-        .unwrap_or_default()
-        .contains(&active_profile)
-    {
-        warn("Launch of the latest release");
-        return Command::new(format!("./target/{active_profile}/{project_name}"))
-            .status()
-            .map(|status| status.code().unwrap_or(1))
-            .unwrap_or(1);
+    let fallback_code = if let Some(cmd) = run_cmd {
+        run_shell(&cmd)
+    } else {
+        run_binary(project_name, &flags.profile, target_dir)
+    };
+    if fallback_code != 1 {
+        return fallback_code;
     }
 
     error("Fix errors in the code to run the project");
-    0
+    1
+}
+
+fn with_dir<F, T>(dir: &Path, f: F) -> Result<T, String>
+where
+    F: FnOnce() -> Result<T, String>,
+{
+    let prev = std::env::current_dir().map_err(|_| "Failed to get current dir".to_string())?;
+    std::env::set_current_dir(dir).map_err(|_| "Failed to change directory".to_string())?;
+    let result = f();
+    let _ = std::env::set_current_dir(prev);
+    result
+}
+
+fn run_shell(cmd: &str) -> i32 {
+    let status = if cfg!(target_os = "windows") {
+        Command::new("cmd").arg("/C").arg(cmd).status()
+    } else {
+        Command::new("sh").arg("-c").arg(cmd).status()
+    };
+    match status {
+        Ok(s) if s.success() => 0,
+        Ok(s) => s.code().unwrap_or(1),
+        Err(_) => 1,
+    }
+}
+
+fn substitute_run_vars(cmd: &str, profile: &str, version: &str) -> String {
+    let info = parse_version_info(version);
+    cmd.replace("{profile}", profile)
+        .replace("{version}", &info.full)
+        .replace("{version_major}", &info.major)
+        .replace("{version_minor}", &info.minor)
+        .replace("{version_patch}", &info.patch)
+        .replace("{version_suffix}", &info.suffix)
+        .replace("{version_suffix_dash}", &info.suffix_dash)
+}
+
+struct VersionInfo {
+    full: String,
+    major: String,
+    minor: String,
+    patch: String,
+    suffix: String,
+    suffix_dash: String,
+}
+
+fn parse_version_info(version: &str) -> VersionInfo {
+    let mut full = version.trim().to_string();
+    if full.is_empty() {
+        full = "0.0.0".to_string();
+    }
+    let full_clone = full.clone();
+    let (base, suffix) = match full_clone.split_once('-') {
+        Some((head, tail)) => (head, tail),
+        None => (full_clone.as_str(), ""),
+    };
+    let mut parts = base.split('.');
+    let major = parts.next().unwrap_or("0").to_string();
+    let minor = parts.next().unwrap_or("0").to_string();
+    let patch = parts.next().unwrap_or("0").to_string();
+    let suffix_dash = if suffix.is_empty() {
+        "".to_string()
+    } else {
+        format!("-{suffix}")
+    };
+    VersionInfo {
+        full,
+        major,
+        minor,
+        patch,
+        suffix: suffix.to_string(),
+        suffix_dash,
+    }
 }

src/cli/test.rs

@@ -0,0 +1,269 @@
+use crate::cli::build;
+use crate::config::{FILE_DCR_TEST_H, FILE_TEST_C, flags};
+use crate::core::config::Config;
+use crate::utils::fs::find_project_root;
+use crate::utils::log::error;
+use crate::utils::text::{BOLD_GREEN, BOLD_RED, RESET, colored};
+use std::env;
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+
+const BOLD_BLUE: &str = "\x1b[1m\x1b[94m";
+
+pub fn test(args: &[String]) -> i32 {
+    let mut init_header = false;
+    for arg in args {
+        if arg == "--help" {
+            println!("USAGE:");
+            println!("    dcr test [--init]");
+            println!();
+            println!("ALIASES:");
+            println!("    dcr tests");
+            println!();
+            println!("DESCRIPTION:");
+            println!("    Runs project tests and prints a unified testsuite report.");
+            println!();
+            println!("OPTIONS:");
+            println!("    --init            Create tests/dcr_test.h in current project");
+            return 0;
+        }
+        if arg == "--init" {
+            init_header = true;
+            continue;
+        }
+        error("Unknown argument");
+        return 1;
+    }
+
+    let start_dir = match std::env::current_dir() {
+        Ok(dir) => dir,
+        Err(_) => {
+            error("Failed to determine current directory");
+            return 1;
+        }
+    };
+    let root = match find_project_root(&start_dir) {
+        Ok(Some(dir)) => dir,
+        Ok(None) => {
+            error("dcr.toml file not found");
+            return 1;
+        }
+        Err(_) => {
+            error("Failed to find project root");
+            return 1;
+        }
+    };
+
+    if init_header {
+        match with_dir(&root, ensure_test_header) {
+            Ok(()) => {}
+            Err(msg) => {
+                error(&msg);
+                return 1;
+            }
+        }
+    }
+
+    match with_dir(&root, run_testsuite) {
+        Ok(code) => code,
+        Err(msg) => {
+            error(&msg);
+            1
+        }
+    }
+}
+
+fn run_testsuite() -> Result<i32, String> {
+    if build::build(&[String::from("--release")]) != 0 {
+        return Ok(1);
+    }
+
+    let config = Config::open("./dcr.toml").map_err(|_| "Failed to read dcr.toml".to_string())?;
+    let name = config
+        .get("package.name")
+        .and_then(|v| v.as_str())
+        .ok_or("package.name not found in dcr.toml")?;
+    let kind = config
+        .get("package.kind")
+        .and_then(|v| v.as_str())
+        .unwrap_or("bin");
+
+    let compiler = env::var("DCR_CC").unwrap_or_else(|_| "cc".to_string());
+    let profile = "release";
+    let flags_vec = flags(profile).unwrap_or(&[]);
+    let flags_str = flags_vec.join(" ");
+
+    let test_c = "./tests/test.c";
+    if !Path::new(test_c).exists() {
+        return Err("tests/test.c not found; run 'dcr test --init' first".to_string());
+    }
+
+    // Compile test.c to object
+    let obj_path = "./tests/test.o";
+    let compile_cmd = format!("{} -c {} -o {} {}", compiler, test_c, obj_path, flags_str);
+    let compile_status = Command::new("sh")
+        .arg("-c")
+        .arg(&compile_cmd)
+        .status()
+        .map_err(|_| format!("Failed to compile {}", test_c))?;
+    if !compile_status.success() {
+        return Err(format!("Compilation of {} failed", test_c));
+    }
+
+    // Link
+    let bin_path = format!("./tests/test{}", std::env::consts::EXE_SUFFIX);
+    let link_cmd = if kind == "lib" {
+        format!(
+            "{} {} -o {} -Ltarget/release -l{}",
+            compiler, obj_path, bin_path, name
+        )
+    } else {
+        format!("{} {} -o {}", compiler, obj_path, bin_path)
+    };
+    let link_status = Command::new("sh")
+        .arg("-c")
+        .arg(&link_cmd)
+        .status()
+        .map_err(|_| format!("Failed to link {}", bin_path))?;
+    if !link_status.success() {
+        return Err(format!("Linking of {} failed", bin_path));
+    }
+
+    let out = Command::new(&bin_path)
+        .output()
+        .map_err(|_| format!("Failed to run `{bin_path}`"))?;
+
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    let stderr = String::from_utf8_lossy(&out.stderr);
+    if !stderr.trim().is_empty() {
+        eprint!("{}", stderr);
+    }
+
+    let declared = extract_test_names("./tests/test.c");
+    let mut pass = 0;
+    let mut skip = 0;
+    let mut fail = 0;
+    let mut parsed_any = false;
+
+    for line in stdout.lines() {
+        let line = line.trim();
+        if let Some(name) = line.strip_prefix("[PASS] ") {
+            println!("{} {}", colored("[PASS]", BOLD_GREEN), name);
+            pass += 1;
+            parsed_any = true;
+            continue;
+        }
+        if let Some(name) = line.strip_prefix("[SKIP] ") {
+            println!("{} {}", colored("[SKIP]", BOLD_BLUE), name);
+            skip += 1;
+            parsed_any = true;
+            continue;
+        }
+        if let Some(name) = line.strip_prefix("[FAIL] ") {
+            println!("{} {}", colored("[FAIL]", BOLD_RED), name);
+            fail += 1;
+            parsed_any = true;
+            continue;
+        }
+        if let Some((status, name)) = line.split_once('\t') {
+            match status {
+                "PASS" => {
+                    println!("{} {}", colored("[PASS]", BOLD_GREEN), name);
+                    pass += 1;
+                    parsed_any = true;
+                }
+                "SKIP" => {
+                    println!("{} {}", colored("[SKIP]", BOLD_BLUE), name);
+                    skip += 1;
+                    parsed_any = true;
+                }
+                "FAIL" => {
+                    println!("{} {}", colored("[FAIL]", BOLD_RED), name);
+                    fail += 1;
+                    parsed_any = true;
+                }
+                _ => {}
+            }
+        }
+    }
+
+    if !parsed_any {
+        if out.status.success() {
+            for name in &declared {
+                println!("{} {}", colored("[PASS]", BOLD_GREEN), name);
+            }
+            pass = declared.len() as i32;
+        } else {
+            println!("{} testsuite", colored("[FAIL]", BOLD_RED));
+            fail = 1;
+        }
+    }
+
+    let total = if parsed_any || declared.is_empty() {
+        pass + skip + fail
+    } else {
+        declared.len() as i32
+    };
+
+    println!();
+    println!("{}", colored("=====================", BOLD_GREEN));
+    println!("{}", colored("  Testsuite summary  ", BOLD_GREEN));
+    println!("{}", colored("=====================", BOLD_GREEN));
+    println!("TOTAL: {}", total);
+    print_field("PASS", pass, BOLD_GREEN);
+    print_field("SKIP", skip, BOLD_BLUE);
+    print_field("FAIL", fail, BOLD_RED);
+    println!("{}", colored("=====================", BOLD_GREEN));
+
+    if fail > 0 || !out.status.success() {
+        return Ok(1);
+    }
+    Ok(0)
+}
+
+fn ensure_test_header() -> Result<(), String> {
+    fs::create_dir_all("./tests").map_err(|_| "Failed to create tests/".to_string())?;
+    fs::write("./tests/dcr_test.h", FILE_DCR_TEST_H)
+        .map_err(|_| "Failed to write tests/dcr_test.h".to_string())?;
+    println!("Created tests/dcr_test.h");
+    fs::write("./tests/test.c", FILE_TEST_C)
+        .map_err(|_| "Failed to write tests/test.c".to_string())?;
+    println!("Created tests/test.c");
+    Ok(())
+}
+
+fn extract_test_names(path: &str) -> Vec<String> {
+    let Ok(content) = fs::read_to_string(path) else {
+        return Vec::new();
+    };
+    let mut names = Vec::new();
+    for line in content.lines() {
+        let trimmed = line.trim();
+        if let Some(rest) = trimmed.strip_prefix("TEST_CASE(")
+            && let Some(name) = rest.strip_suffix("),")
+        {
+            names.push(name.to_string());
+        }
+    }
+    names
+}
+
+fn print_field(label: &str, value: i32, color: &str) {
+    if value == 0 {
+        println!("{}:  {}", label, value);
+    } else {
+        println!("{}{}:  {}{}", color, label, value, RESET);
+    }
+}
+
+fn with_dir<F, T>(dir: &Path, f: F) -> Result<T, String>
+where
+    F: FnOnce() -> Result<T, String>,
+{
+    let prev = std::env::current_dir().map_err(|_| "Failed to get current dir".to_string())?;
+    std::env::set_current_dir(dir).map_err(|_| "Failed to change directory".to_string())?;
+    let result = f();
+    let _ = std::env::set_current_dir(prev);
+    result
+}

src/config.rs

@@ -7,16 +7,88 @@ int main(void) {
 }
 "#;
 
+pub const FILE_DCR_TEST_H: &str = r#"#pragma once
+#include <stdio.h>
+#include <string.h>
+
+#define DCR_TEST_PASS 0
+#define DCR_TEST_FAIL 1
+#define DCR_TEST_SKIP 2
+
+#define EXPECT(expr) \
+    do { \
+        if (!(expr)) { \
+            fprintf(stderr, "assert failed: %s (%s:%d)\n", #expr, __FILE__, __LINE__); \
+            return DCR_TEST_FAIL; \
+        } \
+    } while (0)
+
+#define SKIP(reason) \
+    do { \
+        (void)(reason); \
+        return DCR_TEST_SKIP; \
+    } while (0)
+
+#define TEST(name) static int name(void)
+#define TEST_CASE(name) {#name, name}
+
+typedef int (*test_fn_t)(void);
+
+typedef struct {
+    const char *name;
+    test_fn_t fn;
+} test_case_t;
+
+static inline int dcr_test_raw_mode(int argc, char **argv) {
+    return argc > 1 && strcmp(argv[1], "--dcr-raw") == 0;
+}
+
+static inline void dcr_test_print_result(const char *name, int rc, int raw_mode) {
+    const char *tag = (rc == DCR_TEST_PASS) ? "PASS" : (rc == DCR_TEST_SKIP) ? "SKIP" : "FAIL";
+    if (raw_mode) {
+        printf("%s\t%s\n", tag, name);
+    } else {
+        printf("[%s] %s\n", tag, name);
+    }
+}
+"#;
+
+pub const FILE_TEST_C: &str = r#"#include "dcr_test.h"
+
+TEST(test_example) {
+    EXPECT(1 + 1 == 2);
+    return DCR_TEST_PASS;
+}
+
+static test_case_t CASES[] = {
+    TEST_CASE(test_example),
+};
+
+int main(int argc, char **argv) {
+    int raw = dcr_test_raw_mode(argc, argv);
+    int rc = 0;
+    int count = (int)(sizeof(CASES) / sizeof(CASES[0]));
+    for (int i = 0; i < count; ++i) {
+        int status = CASES[i].fn();
+        dcr_test_print_result(CASES[i].name, status, raw);
+        if (status == DCR_TEST_FAIL) {
+            rc = 1;
+        }
+    }
+    return rc;
+}
+"#;
+
 pub fn flags(profile: &str) -> Option<&'static [&'static str]> {
     match profile {
-        "release" => Some(&["-O3", "-DNDEBUG", "-march=native"]),
+        "release" => Some(&["-O3", "-DNDEBUG"]),
         "debug" => Some(&[
             "-O0",
             "-g",
             "-Wall",
             "-Wextra",
             "-fno-omit-frame-pointer",
-            "-DDEBUG",
+            "-DDCR_DEBUG",
         ]),
         _ => None,
     }

src/core/builder/clang.rs

@@ -1,81 +0,0 @@
-use crate::core::builder::BuildContext;
-use crate::platform;
-use std::fs;
-use std::process::Command;
-use std::time::Instant;
-
-pub fn build(ctx: &BuildContext) -> Result<f64, String> {
-    let compiler = if ctx.compiler.is_empty() {
-        "cc"
-    } else {
-        ctx.compiler
-    };
-    let start_time = Instant::now();
-    let mut cmd = Command::new(compiler);
-    let sources = collect_sources(ctx.language)?;
-    for source in &sources {
-        cmd.arg(source);
-    }
-    if !ctx.standard.is_empty() {
-        cmd.arg(format!("-std={}", ctx.standard));
-    }
-    for flag in default_flags(ctx.profile) {
-        cmd.arg(flag);
-    }
-    cmd.arg("-o")
-        .arg(platform::bin_path(ctx.profile, ctx.project_name));
-
-    match cmd.status() {
-        Ok(status) if status.success() => {
-            let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
-            Ok(elapsed)
-        }
-        Ok(_) => Err("Build failed".to_string()),
-        Err(err) => Err(format!("Build failed: {err}")),
-    }
-}
-
-fn collect_sources(language: &str) -> Result<Vec<String>, String> {
-    let lang = language.to_lowercase();
-    let mut sources = Vec::new();
-    let entries = fs::read_dir("./src").map_err(|err| format!("src dir error: {err}"))?;
-    for entry in entries {
-        let entry = entry.map_err(|err| format!("src dir error: {err}"))?;
-        let path = entry.path();
-        if !path.is_file() {
-            continue;
-        }
-        let ext = path
-            .extension()
-            .and_then(|v| v.to_str())
-            .unwrap_or("")
-            .to_lowercase();
-        let file = path.to_string_lossy().to_string();
-        let allowed = (lang == "c" && ext == "c")
-            || ((lang == "c++" || lang == "cpp" || lang == "cxx")
-                && (ext == "cpp" || ext == "cxx" || ext == "cc"));
-        if allowed {
-            sources.push(file);
-        }
-    }
-    sources.sort();
-    if sources.is_empty() {
-        return Err("No source files found in ./src".to_string());
-    }
-    Ok(sources)
-}
-
-fn default_flags(profile: &str) -> &'static [&'static str] {
-    match profile {
-        "release" => &["-O3", "-DNDEBUG", "-march=native"],
-        "debug" => &[
-            "-O0",
-            "-g",
-            "-Wall",
-            "-Wextra",
-            "-fno-omit-frame-pointer",
-            "-DDEBUG",
-        ],
-        _ => &[],
-    }
-}

src/core/builder/common.rs

@@ -0,0 +1,623 @@
+use std::fs;
+use std::path::{Path, PathBuf};
+
+pub fn collect_sources(
+    roots: &[PathBuf],
+    extensions: &[&str],
+    exclude_dirs: &[PathBuf],
+    include_paths: &[String],
+) -> Result<Vec<String>, String> {
+    let mut sources = Vec::new();
+    for root in roots {
+        collect_sources_rec(root, extensions, &mut sources, exclude_dirs, include_paths)?;
+    }
+    sources.sort();
+    if sources.is_empty() {
+        return Err(format!("No source files found in {}", format_roots(roots)));
+    }
+    Ok(sources)
+}
+
+fn collect_sources_rec(
+    dir: &Path,
+    extensions: &[&str],
+    out: &mut Vec<String>,
+    exclude_dirs: &[PathBuf],
+    include_paths: &[String],
+) -> Result<(), String> {
+    let full_dir = if dir.is_absolute() {
+        dir.to_path_buf()
+    } else {
+        std::env::current_dir()
+            .map_err(|err| format!("src dir error: {err}"))?
+            .join(dir)
+    };
+    if is_excluded(&full_dir, exclude_dirs, include_paths) && include_paths.is_empty() {
+        return Ok(());
+    }
+    let entries = fs::read_dir(&full_dir).map_err(|err| format!("src dir error: {err}"))?;
+    for entry in entries {
+        let entry = entry.map_err(|err| format!("src dir error: {err}"))?;
+        let path = entry.path();
+        if path.is_dir() {
+            if is_excluded(&path, exclude_dirs, include_paths) && include_paths.is_empty() {
+                continue;
+            }
+            collect_sources_rec(&path, extensions, out, exclude_dirs, include_paths)?;
+            continue;
+        }
+        if !path.is_file() {
+            continue;
+        }
+        if is_excluded(&path, exclude_dirs, include_paths) {
+            continue;
+        }
+        let ext_raw = path.extension().and_then(|v| v.to_str()).unwrap_or("");
+        let ext_lower = ext_raw.to_lowercase();
+        let matched = extensions
+            .iter()
+            .any(|allowed| *allowed == ext_raw || *allowed == ext_lower);
+        if matched {
+            out.push(normalize_source_path(&path));
+        }
+    }
+    Ok(())
+}
+
+fn format_roots(roots: &[PathBuf]) -> String {
+    if roots.is_empty() {
+        return "<none>".to_string();
+    }
+    let mut out = Vec::new();
+    for root in roots {
+        out.push(root.to_string_lossy().to_string());
+    }
+    out.join(", ")
+}
+
+pub fn is_excluded(path: &Path, exclude_dirs: &[PathBuf], include_paths: &[String]) -> bool {
+    if matches_patterns(path, include_paths, true) {
+        return false;
+    }
+    if matches_patterns(path, include_paths, false) {
+        return true;
+    }
+    exclude_dirs.iter().any(|dir| path.starts_with(dir))
+}
+
+fn matches_patterns(path: &Path, patterns: &[String], positive: bool) -> bool {
+    if patterns.is_empty() {
+        return false;
+    }
+    let cwd = std::env::current_dir().ok();
+    let abs_path = if path.is_absolute() {
+        path.to_path_buf()
+    } else if let Some(base) = cwd.as_ref() {
+        base.join(path)
+    } else {
+        path.to_path_buf()
+    };
+    let abs = abs_path.to_string_lossy().replace('\\', "/");
+    let rel = cwd
+        .as_ref()
+        .and_then(|base| abs_path.strip_prefix(base).ok())
+        .map(|p| p.to_string_lossy().replace('\\', "/"))
+        .unwrap_or_default();
+    let rel_dot = if rel.is_empty() {
+        String::new()
+    } else {
+        format!("./{rel}")
+    };
+    for raw in patterns {
+        let trimmed = raw.trim();
+        if trimmed.is_empty() {
+            continue;
+        }
+        let is_neg = trimmed.starts_with('!');
+        if is_neg == positive {
+            continue;
+        }
+        let normalized = trimmed.trim_start_matches('!').replace('\\', "/");
+        if normalized.is_empty() {
+            continue;
+        }
+        if has_glob_magic(&normalized) {
+            let pat = match glob::Pattern::new(&normalized) {
+                Ok(p) => p,
+                Err(_) => continue,
+            };
+            if pat.matches(&abs)
+                || (!rel.is_empty() && (pat.matches(&rel) || pat.matches(&rel_dot)))
+            {
+                return true;
+            }
+            continue;
+        }
+        let norm = normalized.trim_end_matches('/');
+        let candidate = Path::new(norm);
+        let full = if candidate.is_absolute() {
+            candidate.to_path_buf()
+        } else if let Some(base) = cwd.as_ref() {
+            base.join(candidate)
+        } else {
+            candidate.to_path_buf()
+        };
+        if abs_path.starts_with(&full) {
+            return true;
+        }
+    }
+    false
+}
+
+pub fn has_glob_magic(value: &str) -> bool {
+    value.chars().any(|c| matches!(c, '*' | '?' | '['))
+}
+
+pub fn normalize_source_path(path: &Path) -> String {
+    if !path.is_absolute() {
+        return path.to_string_lossy().to_string();
+    }
+    if let Ok(base) = std::env::current_dir()
+        && let Ok(rel) = path.strip_prefix(&base)
+    {
+        return format!("./{}", rel.to_string_lossy());
+    }
+    path.to_string_lossy().to_string()
+}
+
+pub fn object_path(obj_dir: &Path, source: &str, obj_ext: &str) -> String {
+    let src_path = Path::new(source);
+    let rel = src_path
+        .strip_prefix("./src")
+        .or_else(|_| src_path.strip_prefix("src"))
+        .unwrap_or(src_path);
+    let mut out = obj_dir.join(rel);
+    out.set_extension(obj_ext.trim_start_matches('.'));
+    out.to_string_lossy().to_string()
+}
+
+pub fn needs_rebuild(source: &str, object: &str) -> bool {
+    let src_time = fs::metadata(source).and_then(|m| m.modified());
+    let obj_time = fs::metadata(object).and_then(|m| m.modified());
+    let o_time = match obj_time {
+        Ok(t) => t,
+        Err(_) => return true,
+    };
+    match src_time {
+        Ok(s) if s > o_time => return true,
+        Err(_) => return true,
+        _ => {}
+    }
+
+    let d_file = PathBuf::from(object).with_extension("d");
+    if let Ok(content) = fs::read_to_string(&d_file) {
+        let deps = parse_d_file(&content);
+        for dep in deps {
+            let dep_path = Path::new(&dep);
+            if dep_path == Path::new(object) || dep_path == Path::new(source) {
+                continue;
+            }
+            if let Ok(dep_meta) = fs::metadata(dep_path) {
+                if let Ok(dep_time) = dep_meta.modified()
+                    && dep_time > o_time
+                {
+                    return true;
+                }
+            } else {
+                return true; // Missing dependency triggers rebuild
+            }
+        }
+    }
+    false
+}
+
+fn parse_d_file(content: &str) -> Vec<String> {
+    let mut deps = Vec::new();
+    let text = content.replace("\\\n", " ").replace("\\\r\n", " ");
+    let mut target_end = 0;
+    let chars: Vec<char> = text.chars().collect();
+    for i in 0..chars.len() {
+        if chars[i] == ':' {
+            if i == 1
+                && chars[0].is_ascii_alphabetic()
+                && i + 1 < chars.len()
+                && (chars[i + 1] == '\\' || chars[i + 1] == '/')
+            {
+                continue; // Windows drive letter
+            }
+            target_end = i + 1;
+            break;
+        }
+    }
+
+    let deps_str = if target_end > 0 {
+        &text[target_end..]
+    } else {
+        &text
+    };
+
+    let mut current_path = String::new();
+    let mut in_escape = false;
+
+    for c in deps_str.chars() {
+        if in_escape {
+            if c != '\n' && c != '\r' {
+                current_path.push(c);
+            }
+            in_escape = false;
+        } else if c == '\\' {
+            in_escape = true;
+        } else if c.is_whitespace() {
+            if !current_path.is_empty() {
+                deps.push(current_path.clone());
+                current_path.clear();
+            }
+        } else {
+            current_path.push(c);
+        }
+    }
+    if !current_path.is_empty() {
+        deps.push(current_path);
+    }
+    deps
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::fs;
+    use std::path::PathBuf;
+    use std::sync::Mutex;
+    use std::sync::atomic::{AtomicUsize, Ordering};
+
+    static TEST_COUNTER: AtomicUsize = AtomicUsize::new(0);
+    static CWD_LOCK: Mutex<()> = Mutex::new(());
+
+    fn temp_dir(prefix: &str) -> PathBuf {
+        let n = TEST_COUNTER.fetch_add(1, Ordering::SeqCst);
+        let dir = std::env::temp_dir().join(format!("dcr_test_{prefix}_{n}"));
+        let _ = fs::remove_dir_all(&dir);
+        fs::create_dir_all(&dir).unwrap();
+        dir
+    }
+
+    fn default_roots() -> Vec<PathBuf> {
+        vec![PathBuf::from("src")]
+    }
+
+    #[test]
+    fn object_path_basic() {
+        let obj_dir = Path::new("target/debug/obj");
+        let result = object_path(obj_dir, "./src/main.c", "o");
+        assert_eq!(result, "target/debug/obj/main.o");
+    }
+
+    #[test]
+    fn object_path_nested() {
+        let obj_dir = Path::new("target/debug/obj");
+        let result = object_path(obj_dir, "./src/core/utils.c", "o");
+        assert_eq!(result, "target/debug/obj/core/utils.o");
+    }
+
+    #[test]
+    fn object_path_no_prefix() {
+        let obj_dir = Path::new("target/debug/obj");
+        let result = object_path(obj_dir, "src/main.c", "o");
+        assert_eq!(result, "target/debug/obj/main.o");
+    }
+
+    #[test]
+    fn object_path_msvc_ext() {
+        let obj_dir = Path::new("target/debug/obj");
+        let result = object_path(obj_dir, "./src/main.c", "obj");
+        assert_eq!(result, "target/debug/obj/main.obj");
+    }
+
+    #[test]
+    fn needs_rebuild_no_object() {
+        let dir = temp_dir("rebuild_no_obj");
+        let src = dir.join("test.c");
+        fs::write(&src, "int main() {}").unwrap();
+        let obj = dir.join("test.o");
+        assert!(needs_rebuild(
+            &src.to_string_lossy(),
+            &obj.to_string_lossy()
+        ));
+    }
+
+    #[test]
+    fn needs_rebuild_fresh() {
+        let dir = temp_dir("rebuild_fresh");
+        let src = dir.join("test.c");
+        let obj = dir.join("test.o");
+        fs::write(&src, "int main() {}").unwrap();
+        // Sleep briefly to ensure mtime difference
+        std::thread::sleep(std::time::Duration::from_millis(50));
+        fs::write(&obj, "").unwrap();
+        assert!(!needs_rebuild(
+            &src.to_string_lossy(),
+            &obj.to_string_lossy()
+        ));
+    }
+
+    #[test]
+    fn needs_rebuild_stale() {
+        let dir = temp_dir("rebuild_stale");
+        let src = dir.join("test.c");
+        let obj = dir.join("test.o");
+        fs::write(&obj, "").unwrap();
+        std::thread::sleep(std::time::Duration::from_millis(50));
+        fs::write(&src, "int main() { return 1; }").unwrap();
+        assert!(needs_rebuild(
+            &src.to_string_lossy(),
+            &obj.to_string_lossy()
+        ));
+    }
+
+    #[test]
+    fn is_excluded_match() {
+        let include: Vec<String> = Vec::new();
+        let excluded = vec![PathBuf::from("/project/src/vendor")];
+        assert!(is_excluded(
+            Path::new("/project/src/vendor"),
+            &excluded,
+            &include
+        ));
+        assert!(is_excluded(
+            Path::new("/project/src/vendor/lib.c"),
+            &excluded,
+            &include
+        ));
+    }
+
+    #[test]
+    fn is_excluded_no_match() {
+        let include: Vec<String> = Vec::new();
+        let excluded = vec![PathBuf::from("/project/src/vendor")];
+        assert!(!is_excluded(
+            Path::new("/project/src/main.c"),
+            &excluded,
+            &include
+        ));
+        assert!(!is_excluded(
+            Path::new("/other/vendor"),
+            &excluded,
+            &include
+        ));
+    }
+
+    #[test]
+    fn collect_sources_c_files() {
+        let dir = temp_dir("collect_c");
+        let src = dir.join("src");
+        fs::create_dir_all(&src).unwrap();
+        fs::write(src.join("main.c"), "").unwrap();
+        fs::write(src.join("utils.c"), "").unwrap();
+        fs::write(src.join("README.md"), "").unwrap(); // should be ignored
+
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let include: Vec<String> = Vec::new();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["c"], &[], &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 2);
+        assert!(sources.iter().any(|s| s.ends_with("main.c")));
+        assert!(sources.iter().any(|s| s.ends_with("utils.c")));
+    }
+
+    #[test]
+    fn collect_sources_cpp_files() {
+        let dir = temp_dir("collect_cpp");
+        let src = dir.join("src");
+        fs::create_dir_all(&src).unwrap();
+        fs::write(src.join("main.cpp"), "").unwrap();
+        fs::write(src.join("helper.cxx"), "").unwrap();
+        fs::write(src.join("other.cc"), "").unwrap();
+        fs::write(src.join("skip.c"), "").unwrap(); // should be ignored
+
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let include: Vec<String> = Vec::new();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["cpp", "cxx", "cc"], &[], &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 3);
+    }
+
+    #[test]
+    fn collect_sources_empty_dir() {
+        let dir = temp_dir("collect_empty");
+        let src = dir.join("src");
+        fs::create_dir_all(&src).unwrap();
+
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let include: Vec<String> = Vec::new();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["c"], &[], &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        assert!(result.is_err(), "empty src should return error");
+    }
+
+    #[test]
+    fn collect_sources_respects_excludes() {
+        let dir = temp_dir("collect_exclude");
+        let src = dir.join("src");
+        let vendor = src.join("vendor");
+        fs::create_dir_all(&vendor).unwrap();
+        fs::write(src.join("main.c"), "").unwrap();
+        fs::write(vendor.join("lib.c"), "").unwrap(); // should be excluded
+
+        let exclude = vec![vendor.clone()];
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let include: Vec<String> = Vec::new();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["c"], &exclude, &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 1);
+        assert!(sources[0].ends_with("main.c"));
+    }
+
+    #[test]
+    fn collect_sources_nested() {
+        let dir = temp_dir("collect_nested");
+        let src = dir.join("src");
+        let sub = src.join("core").join("deep");
+        fs::create_dir_all(&sub).unwrap();
+        fs::write(src.join("main.c"), "").unwrap();
+        fs::write(sub.join("nested.c"), "").unwrap();
+
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let include: Vec<String> = Vec::new();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["c"], &[], &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 2);
+    }
+
+    #[test]
+    fn include_overrides_exclude() {
+        let dir = temp_dir("include_override");
+        let src = dir.join("src");
+        let boot = src.join("boot");
+        let arch = boot.join("arch");
+        fs::create_dir_all(&arch).unwrap();
+        fs::write(arch.join("start.s"), "").unwrap();
+        fs::write(boot.join("skip.c"), "").unwrap();
+
+        let exclude = vec![boot.clone()];
+        let include = vec!["src/boot/arch/**".to_string()];
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["s", "c"], &exclude, &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 1);
+        assert!(sources[0].ends_with("start.s"));
+    }
+
+    #[test]
+    fn exclude_glob_with_include_override() {
+        let dir = temp_dir("exclude_glob");
+        let src = dir.join("src");
+        let legacy = src.join("legacy");
+        let allow = legacy.join("allow");
+        fs::create_dir_all(&allow).unwrap();
+        fs::write(legacy.join("skip.c"), "").unwrap();
+        fs::write(allow.join("keep.c"), "").unwrap();
+
+        let exclude = vec![dir.join("src"), dir.join(".")];
+        let include = vec![
+            "!src/legacy/**".to_string(),
+            "src/legacy/allow/**".to_string(),
+        ];
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["c"], &exclude, &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 1);
+        assert!(sources[0].ends_with("keep.c"));
+    }
+
+    #[test]
+    fn exclude_glob_without_include_keeps_other_files() {
+        let dir = temp_dir("exclude_glob_only");
+        let src = dir.join("src");
+        let gen_dir = src.join("gen");
+        fs::create_dir_all(&gen_dir).unwrap();
+        fs::write(src.join("main.c"), "").unwrap();
+        fs::write(gen_dir.join("skip.c"), "").unwrap();
+
+        let exclude: Vec<PathBuf> = Vec::new();
+        let include = vec!["!src/gen/**".to_string()];
+        let _guard = CWD_LOCK.lock().unwrap();
+        let prev = std::env::current_dir().unwrap();
+        std::env::set_current_dir(&dir).unwrap();
+        let roots = default_roots();
+        let result = collect_sources(&roots, &["c"], &exclude, &include);
+        std::env::set_current_dir(prev).unwrap();
+
+        let sources = result.expect("should find sources");
+        assert_eq!(sources.len(), 1);
+        assert!(sources[0].ends_with("main.c"));
+    }
+
+    #[test]
+    fn normalize_relative_path() {
+        let result = normalize_source_path(Path::new("./src/main.c"));
+        assert_eq!(result, "./src/main.c");
+    }
+
+    #[test]
+    fn parse_d_file_gcc_format() {
+        let content = "target/obj/main.o: src/main.c src/utils.h \\\n src/core/types.h";
+        let deps = parse_d_file(content);
+        assert_eq!(deps, vec!["src/main.c", "src/utils.h", "src/core/types.h"]);
+    }
+
+    #[test]
+    fn parse_d_file_msvc_format() {
+        let content = "target/obj/main.obj: \\\n  C:/sdk/include/windows.h \\\n  src/main.c";
+        let deps = parse_d_file(content);
+        assert_eq!(deps, vec!["C:/sdk/include/windows.h", "src/main.c"]);
+    }
+
+    #[test]
+    fn needs_rebuild_header_modified() {
+        let dir = temp_dir("rebuild_header");
+        let src = dir.join("test.c");
+        let header = dir.join("test.h");
+        let obj = dir.join("test.o");
+        let d_file = dir.join("test.d");
+
+        fs::write(&src, "int main() {}").unwrap();
+        fs::write(&header, "#define A 1").unwrap();
+        std::thread::sleep(std::time::Duration::from_millis(50));
+        fs::write(&obj, "").unwrap();
+
+        let d_content = format!(
+            "{}: {} {}",
+            obj.to_string_lossy(),
+            src.to_string_lossy(),
+            header.to_string_lossy()
+        );
+        fs::write(&d_file, d_content).unwrap();
+
+        assert!(
+            !needs_rebuild(&src.to_string_lossy(), &obj.to_string_lossy()),
+            "should be fresh"
+        );
+
+        std::thread::sleep(std::time::Duration::from_millis(50));
+        fs::write(&header, "#define A 2").unwrap(); // modify header
+
+        assert!(
+            needs_rebuild(&src.to_string_lossy(), &obj.to_string_lossy()),
+            "changed header should trigger rebuild"
+        );
+    }
+}

src/core/builder/gas.rs

@@ -0,0 +1,131 @@
+use crate::core::builder::BuildContext;
+use crate::core::builder::common;
+use crate::platform;
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+use std::time::Instant;
+
+pub fn build(ctx: &BuildContext) -> Result<f64, String> {
+    let lang = ctx.language.to_lowercase();
+    if lang.split('+').any(|p| p.trim() != "asm") {
+        return Err("GAS backend requires build.language = \"asm\"".to_string());
+    }
+    let assembler = if ctx.compiler.is_empty() {
+        "as"
+    } else {
+        ctx.compiler
+    };
+    let start_time = Instant::now();
+    let sources = collect_sources(ctx)?;
+    let obj_dir = Path::new("./target").join(ctx.profile).join("obj");
+    let objects = build_objects(assembler, &sources, &obj_dir, ctx, "o")?;
+
+    if ctx.kind == "staticlib" {
+        let lib_path = platform::lib_path(ctx.profile, ctx.project_name, ctx.target_dir);
+        let archiver = ctx.archiver.unwrap_or(if cfg!(target_os = "windows") {
+            "lib"
+        } else {
+            "ar"
+        });
+        let mut cmd = Command::new(archiver);
+        if cfg!(target_os = "windows") && archiver == "lib" {
+            cmd.arg("/nologo").arg(format!("/OUT:{lib_path}"));
+        } else {
+            cmd.arg("rcs").arg(&lib_path);
+        }
+        for obj in &objects {
+            cmd.arg(obj);
+        }
+        if std::env::var("DCR_DEBUG").is_ok() {
+            eprintln!("[dcr] {:?}", cmd);
+        }
+        match cmd.status() {
+            Ok(status) if status.success() => {
+                let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+                return Ok(elapsed);
+            }
+            Ok(_) => return Err("Build failed".to_string()),
+            Err(err) => return Err(format!("Build failed: {err}")),
+        }
+    }
+
+    let mut cmd = Command::new(ctx.linker.unwrap_or("cc"));
+    if ctx.kind == "sharedlib" {
+        if cfg!(target_os = "macos") {
+            cmd.arg("-dynamiclib");
+        } else {
+            cmd.arg("-shared");
+        }
+    }
+    for obj in &objects {
+        cmd.arg(obj);
+    }
+    for dir in ctx.lib_dirs {
+        cmd.arg(format!("-L{dir}"));
+    }
+    for lib in ctx.libs {
+        cmd.arg(format!("-l{lib}"));
+    }
+    for flag in ctx.ldflags {
+        cmd.arg(flag);
+    }
+    let out_path = if ctx.kind == "sharedlib" {
+        platform::shared_lib_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    } else {
+        platform::bin_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    };
+    cmd.arg("-o").arg(out_path);
+
+    if std::env::var("DCR_DEBUG").is_ok() {
+        eprintln!("[dcr] {:?}", cmd);
+    }
+    match cmd.status() {
+        Ok(status) if status.success() => {
+            let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+            Ok(elapsed)
+        }
+        Ok(_) => Err("Build failed".to_string()),
+        Err(err) => Err(format!("Build failed: {err}")),
+    }
+}
+
+pub(crate) fn collect_sources(ctx: &BuildContext) -> Result<Vec<String>, String> {
+    // GAS handles only lowercase .s files
+    common::collect_sources(
+        ctx.source_roots,
+        &["s"],
+        ctx.exclude_dirs,
+        ctx.include_paths,
+    )
+}
+
+fn build_objects(
+    assembler: &str,
+    sources: &[String],
+    obj_dir: &Path,
+    ctx: &BuildContext,
+    obj_ext: &str,
+) -> Result<Vec<String>, String> {
+    let mut objects = Vec::new();
+    for source in sources {
+        let obj_path = common::object_path(obj_dir, source, obj_ext);
+        if let Some(parent) = Path::new(&obj_path).parent() {
+            fs::create_dir_all(parent).map_err(|err| format!("obj dir error: {err}"))?;
+        }
+        if common::needs_rebuild(source, &obj_path) {
+            let mut cmd = Command::new(assembler);
+            cmd.arg(source).arg("-o").arg(&obj_path);
+            for flag in ctx.cflags {
+                cmd.arg(flag);
+            }
+            match cmd.status() {
+                Ok(status) if status.success() => {}
+                Ok(_) => return Err("Build failed".to_string()),
+                Err(err) => return Err(format!("Build failed: {err}")),
+            }
+        }
+        objects.push(obj_path);
+    }
+    Ok(objects)
+}

src/core/builder/gcc.rs

@@ -1,81 +0,0 @@
-use crate::core::builder::BuildContext;
-use crate::platform;
-use std::fs;
-use std::process::Command;
-use std::time::Instant;
-
-pub fn build(ctx: &BuildContext) -> Result<f64, String> {
-    let compiler = if ctx.compiler.is_empty() {
-        "cc"
-    } else {
-        ctx.compiler
-    };
-    let start_time = Instant::now();
-    let mut cmd = Command::new(compiler);
-    let sources = collect_sources(ctx.language)?;
-    for source in &sources {
-        cmd.arg(source);
-    }
-    if !ctx.standard.is_empty() {
-        cmd.arg(format!("-std={}", ctx.standard));
-    }
-    for flag in default_flags(ctx.profile) {
-        cmd.arg(flag);
-    }
-    cmd.arg("-o")
-        .arg(platform::bin_path(ctx.profile, ctx.project_name));
-
-    match cmd.status() {
-        Ok(status) if status.success() => {
-            let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
-            Ok(elapsed)
-        }
-        Ok(_) => Err("Build failed".to_string()),
-        Err(err) => Err(format!("Build failed: {err}")),
-    }
-}
-
-fn collect_sources(language: &str) -> Result<Vec<String>, String> {
-    let lang = language.to_lowercase();
-    let mut sources = Vec::new();
-    let entries = fs::read_dir("./src").map_err(|err| format!("src dir error: {err}"))?;
-    for entry in entries {
-        let entry = entry.map_err(|err| format!("src dir error: {err}"))?;
-        let path = entry.path();
-        if !path.is_file() {
-            continue;
-        }
-        let ext = path
-            .extension()
-            .and_then(|v| v.to_str())
-            .unwrap_or("")
-            .to_lowercase();
-        let file = path.to_string_lossy().to_string();
-        let allowed = (lang == "c" && ext == "c")
-            || ((lang == "c++" || lang == "cpp" || lang == "cxx")
-                && (ext == "cpp" || ext == "cxx" || ext == "cc"));
-        if allowed {
-            sources.push(file);
-        }
-    }
-    sources.sort();
-    if sources.is_empty() {
-        return Err("No source files found in ./src".to_string());
-    }
-    Ok(sources)
-}
-
-fn default_flags(profile: &str) -> &'static [&'static str] {
-    match profile {
-        "release" => &["-O3", "-DNDEBUG", "-march=native"],
-        "debug" => &[
-            "-O0",
-            "-g",
-            "-Wall",
-            "-Wextra",
-            "-fno-omit-frame-pointer",
-            "-DDEBUG",
-        ],
-        _ => &[],
-    }
-}

src/core/builder/mod.rs

@@ -1,6 +1,8 @@
-pub mod clang;
-pub mod gcc;
+pub mod common;
+pub mod gas;
 pub mod msvc;
+pub mod nasm;
+pub mod unix_cc;
 
 pub struct BuildContext<'a> {
     pub profile: &'a str,
@@ -8,6 +10,21 @@ pub struct BuildContext<'a> {
     pub compiler: &'a str,
     pub language: &'a str,
     pub standard: &'a str,
+    #[allow(dead_code)]
+    pub target: Option<&'a str>,
+    pub target_dir: Option<&'a str>,
+    pub kind: &'a str,
+    pub platform: Option<&'a str>,
+    pub linker: Option<&'a str>,
+    pub archiver: Option<&'a str>,
+    pub source_roots: &'a [std::path::PathBuf],
+    pub exclude_dirs: &'a [std::path::PathBuf],
+    pub include_paths: &'a [String],
+    pub include_dirs: &'a [String],
+    pub lib_dirs: &'a [String],
+    pub libs: &'a [String],
+    pub cflags: &'a [String],
+    pub ldflags: &'a [String],
 }
 
 pub fn build(ctx: &BuildContext) -> Result<f64, String> {
@@ -15,14 +32,28 @@ pub fn build(ctx: &BuildContext) -> Result<f64, String> {
     if compiler.contains("clang-cl") {
         return msvc::build(ctx);
     }
-    if compiler.contains("gcc") || compiler.contains("g++") {
-        return gcc::build(ctx);
+    if compiler == "as" || compiler.contains("gas") {
+        return gas::build(ctx);
     }
-    if compiler.contains("clang") || compiler.contains("clang++") {
-        return clang::build(ctx);
+    if compiler.contains("nasm") {
+        return nasm::build(ctx);
     }
     if compiler == "cl" || compiler.contains("msvc") {
         return msvc::build(ctx);
     }
-    clang::build(ctx)
+    unix_cc::build(ctx)
+}
+
+pub fn collect_sources(ctx: &BuildContext) -> Result<Vec<String>, String> {
+    let compiler = ctx.compiler.to_lowercase();
+    if compiler.contains("clang-cl") || compiler == "cl" || compiler.contains("msvc") {
+        return msvc::collect_sources(ctx);
+    }
+    if compiler == "as" || compiler.contains("gas") {
+        return gas::collect_sources(ctx);
+    }
+    if compiler.contains("nasm") {
+        return nasm::collect_sources(ctx);
+    }
+    unix_cc::collect_sources(ctx)
 }

src/core/builder/msvc.rs

@@ -1,6 +1,8 @@
 use crate::core::builder::BuildContext;
+use crate::core::builder::common;
 use crate::platform;
 use std::fs;
+use std::path::Path;
 use std::process::Command;
 use std::time::Instant;
 
@@ -10,11 +12,40 @@ pub fn build(ctx: &BuildContext) -> Result<f64, String> {
     } else {
         ctx.compiler
     };
+    let lang = ctx.language.to_lowercase();
+    if lang.contains("asm") {
+        return Err("MSVC backend does not support build.language with asm".to_string());
+    }
     let start_time = Instant::now();
-    let mut cmd = Command::new(compiler);
-    let sources = collect_sources(ctx.language)?;
+    let sources = collect_sources(ctx)?;
+    let obj_dir = Path::new("./target").join(ctx.profile).join("obj");
+    let objects = build_objects(compiler, &sources, &obj_dir, ctx, "obj")?;
 
+    if ctx.kind == "staticlib" {
+        let lib_path = platform::lib_path(ctx.profile, ctx.project_name, ctx.target_dir);
+        let mut cmd = Command::new(ctx.archiver.unwrap_or("lib"));
+        cmd.arg("/nologo").arg(format!("/OUT:{lib_path}"));
+        for obj in &objects {
+            cmd.arg(obj);
+        }
+        if std::env::var("DCR_DEBUG").is_ok() {
+            eprintln!("[dcr] {:?}", cmd);
+        }
+        match cmd.status() {
+            Ok(status) if status.success() => {
+                let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+                return Ok(elapsed);
+            }
+            Ok(_) => return Err("Build failed".to_string()),
+            Err(err) => return Err(format!("Build failed: {err}")),
+        }
+    }
+
+    let mut cmd = Command::new(compiler);
     cmd.arg("/nologo");
+    if ctx.kind == "sharedlib" {
+        cmd.arg("/LD");
+    }
     match ctx.language.to_lowercase().as_str() {
         "c" => {
             cmd.arg("/TC");
@@ -32,18 +63,43 @@ pub fn build(ctx: &BuildContext) -> Result<f64, String> {
         cmd.arg(std_flag);
     }
 
-    for flag in default_flags(ctx.profile) {
+    for obj in &objects {
+        cmd.arg(obj);
+    }
+    if ctx.cflags.is_empty() {
+        for flag in default_flags(ctx.profile) {
+            cmd.arg(flag);
+        }
+    }
+    for flag in ctx.cflags {
         cmd.arg(flag);
     }
-
-    for source in &sources {
-        cmd.arg(source);
+    for dir in ctx.lib_dirs {
+        cmd.arg(format!("/LIBPATH:{dir}"));
     }
-    cmd.arg(format!(
-        "/Fe:{}",
-        platform::bin_path(ctx.profile, ctx.project_name)
-    ));
+    for lib in ctx.libs {
+        if lib.to_lowercase().ends_with(".lib") {
+            cmd.arg(lib);
+        } else {
+            cmd.arg(format!("{lib}.lib"));
+        }
+    }
+    if !ctx.ldflags.is_empty() {
+        cmd.arg("/link");
+        for flag in ctx.ldflags {
+            cmd.arg(flag);
+        }
+    }
+    let out_path = if ctx.kind == "sharedlib" {
+        platform::shared_lib_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    } else {
+        platform::bin_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    };
+    cmd.arg(format!("/Fe:{out_path}"));
 
+    if std::env::var("DCR_DEBUG").is_ok() {
+        eprintln!("[dcr] {:?}", cmd);
+    }
     match cmd.status() {
         Ok(status) if status.success() => {
             let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
@@ -54,34 +110,31 @@ pub fn build(ctx: &BuildContext) -> Result<f64, String> {
     }
 }
 
-fn collect_sources(language: &str) -> Result<Vec<String>, String> {
-    let lang = language.to_lowercase();
-    let mut sources = Vec::new();
-    let entries = fs::read_dir("./src").map_err(|err| format!("src dir error: {err}"))?;
-    for entry in entries {
-        let entry = entry.map_err(|err| format!("src dir error: {err}"))?;
-        let path = entry.path();
-        if !path.is_file() {
-            continue;
-        }
-        let ext = path
-            .extension()
-            .and_then(|v| v.to_str())
-            .unwrap_or("")
-            .to_lowercase();
-        let file = path.to_string_lossy().to_string();
-        let allowed = (lang == "c" && ext == "c")
-            || ((lang == "c++" || lang == "cpp" || lang == "cxx")
-                && (ext == "cpp" || ext == "cxx" || ext == "cc"));
-        if allowed {
-            sources.push(file);
+pub(crate) fn collect_sources(ctx: &BuildContext) -> Result<Vec<String>, String> {
+    let extensions = source_extensions(ctx.language);
+    common::collect_sources(
+        ctx.source_roots,
+        &extensions,
+        ctx.exclude_dirs,
+        ctx.include_paths,
+    )
+}
+
+fn source_extensions(language: &str) -> Vec<&str> {
+    let mut out = Vec::new();
+    for part in language.split('+') {
+        let lang = part.trim().to_lowercase();
+        match lang.as_str() {
+            "c" => out.extend(["c"]),
+            "c++" | "cpp" | "cxx" => out.extend(["cpp", "cxx", "cc"]),
+            "asm" => {}
+            _ => {}
         }
     }
-    sources.sort();
-    if sources.is_empty() {
-        return Err("No source files found in ./src".to_string());
+    if out.is_empty() {
+        out.extend(["c"]);
     }
-    Ok(sources)
+    out
 }
 
 fn msvc_standard_flag(language: &str, standard: &str) -> Result<String, String> {
@@ -107,10 +160,128 @@ fn msvc_standard_flag(language: &str, standard: &str) -> Result<String, String>
     Err("Unsupported language".to_string())
 }
 
+fn msvc_arch_flag(platform: Option<&str>) -> Option<&'static str> {
+    let raw = platform?.trim();
+    if raw.is_empty() {
+        return None;
+    }
+    let p = raw.to_lowercase().replace('-', "_");
+    if p == "x86" || (p.starts_with('i') && p.ends_with("86") && p.len() == 4) {
+        return Some("/arch:IA32");
+    }
+    match p.as_str() {
+        "sse2" => Some("/arch:SSE2"),
+        "avx" => Some("/arch:AVX"),
+        "avx2" => Some("/arch:AVX2"),
+        _ => None,
+    }
+}
+
 fn default_flags(profile: &str) -> &'static [&'static str] {
     match profile {
         "release" => &["/O2", "/DNDEBUG"],
-        "debug" => &["/Od", "/Zi", "/W4", "/DDEBUG", "/Oy-"],
+        "debug" => &["/Od", "/Zi", "/W4", "/DDCR_DEBUG", "/Oy-"],
         _ => &[],
     }
 }
+
+fn build_objects(
+    compiler: &str,
+    sources: &[String],
+    obj_dir: &Path,
+    ctx: &BuildContext,
+    obj_ext: &str,
+) -> Result<Vec<String>, String> {
+    let mut objects = Vec::new();
+    for source in sources {
+        let obj_path = common::object_path(obj_dir, source, obj_ext);
+        if let Some(parent) = Path::new(&obj_path).parent() {
+            fs::create_dir_all(parent).map_err(|err| format!("obj dir error: {err}"))?;
+        }
+        if common::needs_rebuild(source, &obj_path) {
+            let mut cmd = Command::new(compiler);
+            cmd.arg("/nologo");
+            match ctx.language.to_lowercase().as_str() {
+                "c" => {
+                    cmd.arg("/TC");
+                }
+                "c++" | "cpp" | "cxx" => {
+                    cmd.arg("/TP");
+                }
+                _ => {
+                    return Err("Unsupported language".to_string());
+                }
+            }
+            if !ctx.standard.is_empty() && ctx.language.to_lowercase() != "asm" {
+                let std_flag = msvc_standard_flag(ctx.language, ctx.standard)?;
+                cmd.arg(std_flag);
+            }
+            if let Some(flag) = msvc_arch_flag(ctx.platform) {
+                cmd.arg(flag);
+            }
+            if ctx.cflags.is_empty() {
+                for flag in default_flags(ctx.profile) {
+                    cmd.arg(flag);
+                }
+            }
+            for flag in ctx.cflags {
+                cmd.arg(flag);
+            }
+            for dir in ctx.include_dirs {
+                cmd.arg(format!("/I{dir}"));
+            }
+            cmd.arg("/c").arg(source).arg(format!("/Fo:{}", obj_path));
+            cmd.arg("/showIncludes");
+
+            if std::env::var("DCR_DEBUG").is_ok() {
+                eprintln!("[dcr] {:?}", cmd);
+            }
+            let output = cmd.output().map_err(|err| format!("Build failed: {err}"))?;
+            let stdout = String::from_utf8_lossy(&output.stdout);
+            let stderr = String::from_utf8_lossy(&output.stderr);
+
+            let mut headers = Vec::new();
+            let mut clean_stdout = String::new();
+            for line in stdout.lines() {
+                if let Some(stripped) = line.strip_prefix("Note: including file:") {
+                    headers.push(stripped.trim().to_string());
+                } else if let Some(stripped) = line.strip_prefix("Примечание: включение файла:")
+                {
+                    headers.push(stripped.trim().to_string());
+                } else {
+                    clean_stdout.push_str(line);
+                    clean_stdout.push('\n');
+                }
+            }
+
+            if !output.status.success() {
+                eprint!("{}", clean_stdout);
+                eprint!("{}", stderr);
+                return Err("Build failed".to_string());
+            } else {
+                let trimmed_out = clean_stdout.trim();
+                let trimmed_err = stderr.trim();
+                let src_filename = Path::new(source)
+                    .file_name()
+                    .and_then(|v| v.to_str())
+                    .unwrap_or("");
+                if !trimmed_out.is_empty() && trimmed_out != src_filename {
+                    print!("{}", clean_stdout);
+                }
+                if !trimmed_err.is_empty() {
+                    eprintln!("{}", trimmed_err);
+                }
+            }
+
+            let d_path = Path::new(&obj_path).with_extension("d");
+            let mut d_content = format!("{}: \\\n", obj_path.replace('\\', "/"));
+            for h in headers {
+                let escaped = h.replace('\\', "/").replace(" ", "\\ ");
+                d_content.push_str(&format!("  {} \\\n", escaped));
+            }
+            std::fs::write(&d_path, d_content).map_err(|err| format!("d file error: {err}"))?;
+        }
+        objects.push(obj_path);
+    }
+    Ok(objects)
+}

src/core/builder/nasm.rs

@@ -0,0 +1,175 @@
+use crate::core::builder::BuildContext;
+use crate::core::builder::common;
+use crate::platform;
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+use std::time::Instant;
+
+pub fn build(ctx: &BuildContext) -> Result<f64, String> {
+    let lang = ctx.language.to_lowercase();
+    if lang.split('+').any(|p| p.trim() != "asm") {
+        return Err("NASM backend requires build.language = \"asm\"".to_string());
+    }
+    let assembler = if ctx.compiler.is_empty() {
+        "nasm"
+    } else {
+        ctx.compiler
+    };
+    let start_time = Instant::now();
+    let sources = collect_sources(ctx)?;
+    let obj_dir = Path::new("./target").join(ctx.profile).join("obj");
+    let objects = build_objects(assembler, &sources, &obj_dir, ctx, "o")?;
+
+    if ctx.kind == "staticlib" {
+        let lib_path = platform::lib_path(ctx.profile, ctx.project_name, ctx.target_dir);
+        let archiver = ctx.archiver.unwrap_or(if cfg!(target_os = "windows") {
+            "lib"
+        } else {
+            "ar"
+        });
+        let mut cmd = Command::new(archiver);
+        if cfg!(target_os = "windows") && archiver == "lib" {
+            cmd.arg("/nologo").arg(format!("/OUT:{lib_path}"));
+        } else {
+            cmd.arg("rcs").arg(&lib_path);
+        }
+        for obj in &objects {
+            cmd.arg(obj);
+        }
+        if std::env::var("DCR_DEBUG").is_ok() {
+            eprintln!("[dcr] {:?}", cmd);
+        }
+        match cmd.status() {
+            Ok(status) if status.success() => {
+                let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+                return Ok(elapsed);
+            }
+            Ok(_) => return Err("Build failed".to_string()),
+            Err(err) => return Err(format!("Build failed: {err}")),
+        }
+    }
+
+    let mut cmd = Command::new(ctx.linker.unwrap_or("cc"));
+    if ctx.kind == "sharedlib" {
+        if cfg!(target_os = "macos") {
+            cmd.arg("-dynamiclib");
+        } else {
+            cmd.arg("-shared");
+        }
+    }
+    for obj in &objects {
+        cmd.arg(obj);
+    }
+    for dir in ctx.lib_dirs {
+        cmd.arg(format!("-L{dir}"));
+    }
+    for lib in ctx.libs {
+        cmd.arg(format!("-l{lib}"));
+    }
+    for flag in ctx.ldflags {
+        cmd.arg(flag);
+    }
+    let out_path = if ctx.kind == "sharedlib" {
+        platform::shared_lib_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    } else {
+        platform::bin_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    };
+    cmd.arg("-o").arg(out_path);
+
+    if std::env::var("DCR_DEBUG").is_ok() {
+        eprintln!("[dcr] {:?}", cmd);
+    }
+    match cmd.status() {
+        Ok(status) if status.success() => {
+            let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+            Ok(elapsed)
+        }
+        Ok(_) => Err("Build failed".to_string()),
+        Err(err) => Err(format!("Build failed: {err}")),
+    }
+}
+
+pub(crate) fn collect_sources(ctx: &BuildContext) -> Result<Vec<String>, String> {
+    // NASM handles lowercase .s and .asm only (not .S which is GCC preprocessed)
+    common::collect_sources(
+        ctx.source_roots,
+        &["asm", "s"],
+        ctx.exclude_dirs,
+        ctx.include_paths,
+    )
+}
+
+fn build_objects(
+    assembler: &str,
+    sources: &[String],
+    obj_dir: &Path,
+    ctx: &BuildContext,
+    obj_ext: &str,
+) -> Result<Vec<String>, String> {
+    let mut objects = Vec::new();
+    let format = nasm_format(ctx.platform);
+    for source in sources {
+        let obj_path = common::object_path(obj_dir, source, obj_ext);
+        if let Some(parent) = Path::new(&obj_path).parent() {
+            fs::create_dir_all(parent).map_err(|err| format!("obj dir error: {err}"))?;
+        }
+        if common::needs_rebuild(source, &obj_path) {
+            let mut cmd = Command::new(assembler);
+            cmd.arg("-f")
+                .arg(format)
+                .arg(source)
+                .arg("-o")
+                .arg(&obj_path);
+            for flag in ctx.cflags {
+                cmd.arg(flag);
+            }
+            if std::env::var("DCR_DEBUG").is_ok() {
+                eprintln!("[dcr] {:?}", cmd);
+            }
+            match cmd.status() {
+                Ok(status) if status.success() => {}
+                Ok(_) => return Err("Build failed".to_string()),
+                Err(err) => return Err(format!("Build failed: {err}")),
+            }
+        }
+        objects.push(obj_path);
+    }
+    Ok(objects)
+}
+
+fn nasm_format(platform: Option<&str>) -> &'static str {
+    if let Some(p) = platform {
+        let p = p.to_lowercase().replace('-', "_");
+        if p == "x86" || (p.starts_with('i') && p.ends_with("86") && p.len() == 4) {
+            #[cfg(target_os = "macos")]
+            {
+                return "macho32";
+            }
+            #[cfg(target_os = "windows")]
+            {
+                return "win32";
+            }
+            #[cfg(not(any(target_os = "macos", target_os = "windows")))]
+            {
+                return "elf32";
+            }
+        }
+    }
+    #[cfg(target_os = "linux")]
+    {
+        "elf64"
+    }
+    #[cfg(target_os = "macos")]
+    {
+        "macho64"
+    }
+    #[cfg(target_os = "windows")]
+    {
+        "win64"
+    }
+    #[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
+    {
+        "elf64"
+    }
+}

src/core/builder/unix_cc.rs

@@ -0,0 +1,192 @@
+use crate::core::builder::BuildContext;
+use crate::core::builder::common;
+use crate::platform;
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+use std::time::Instant;
+
+pub fn build(ctx: &BuildContext) -> Result<f64, String> {
+    let compiler = if ctx.compiler.is_empty() {
+        "cc"
+    } else {
+        ctx.compiler
+    };
+    let start_time = Instant::now();
+    let extensions = source_extensions(ctx.language);
+    let sources = common::collect_sources(
+        ctx.source_roots,
+        &extensions,
+        ctx.exclude_dirs,
+        ctx.include_paths,
+    )?;
+    let obj_dir = Path::new("./target").join(ctx.profile).join("obj");
+    let objects = build_objects(compiler, &sources, &obj_dir, ctx, "o")?;
+
+    if ctx.kind == "staticlib" {
+        let lib_path = platform::lib_path(ctx.profile, ctx.project_name, ctx.target_dir);
+        let mut cmd = Command::new(ctx.archiver.unwrap_or("ar"));
+        cmd.arg("rcs").arg(&lib_path);
+        for obj in &objects {
+            cmd.arg(obj);
+        }
+        if std::env::var("DCR_DEBUG").is_ok() {
+            eprintln!("[dcr] {:?}", cmd);
+        }
+        match cmd.status() {
+            Ok(status) if status.success() => {
+                let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+                return Ok(elapsed);
+            }
+            Ok(_) => return Err("Build failed".to_string()),
+            Err(err) => return Err(format!("Build failed: {err}")),
+        }
+    }
+
+    let mut cmd = Command::new(ctx.linker.unwrap_or(compiler));
+    if ctx.kind == "sharedlib" {
+        if cfg!(target_os = "macos") {
+            cmd.arg("-dynamiclib");
+        } else {
+            cmd.arg("-shared");
+        }
+    }
+    for obj in &objects {
+        cmd.arg(obj);
+    }
+    for dir in ctx.lib_dirs {
+        cmd.arg(format!("-L{dir}"));
+    }
+    for lib in ctx.libs {
+        cmd.arg(format!("-l{lib}"));
+    }
+    for flag in ctx.ldflags {
+        cmd.arg(flag);
+    }
+    let out_path = if ctx.kind == "sharedlib" {
+        platform::shared_lib_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    } else {
+        platform::bin_path(ctx.profile, ctx.project_name, ctx.target_dir)
+    };
+    cmd.arg("-o").arg(out_path);
+
+    if std::env::var("DCR_DEBUG").is_ok() {
+        eprintln!("[dcr] {:?}", cmd);
+    }
+    match cmd.status() {
+        Ok(status) if status.success() => {
+            let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
+            Ok(elapsed)
+        }
+        Ok(_) => Err("Build failed".to_string()),
+        Err(err) => Err(format!("Build failed: {err}")),
+    }
+}
+
+pub(crate) fn collect_sources(ctx: &BuildContext) -> Result<Vec<String>, String> {
+    let extensions = source_extensions(ctx.language);
+    common::collect_sources(
+        ctx.source_roots,
+        &extensions,
+        ctx.exclude_dirs,
+        ctx.include_paths,
+    )
+}
+
+fn source_extensions(language: &str) -> Vec<&str> {
+    let mut out = Vec::new();
+    for part in language.split('+') {
+        let lang = part.trim().to_lowercase();
+        match lang.as_str() {
+            "c" => out.extend(["c"]),
+            "c++" | "cpp" | "cxx" => out.extend(["cpp", "cxx", "cc"]),
+            "asm" => out.extend(["s", "S", "asm"]),
+            _ => {}
+        }
+    }
+    if out.is_empty() {
+        out.extend(["c"]);
+    }
+    out
+}
+
+fn default_flags(profile: &str) -> &'static [&'static str] {
+    match profile {
+        "release" => &["-O3", "-DNDEBUG"],
+        "debug" => &[
+            "-O0",
+            "-g",
+            "-Wall",
+            "-Wextra",
+            "-fno-omit-frame-pointer",
+            "-DDCR_DEBUG",
+        ],
+        _ => &[],
+    }
+}
+
+fn build_objects(
+    compiler: &str,
+    sources: &[String],
+    obj_dir: &Path,
+    ctx: &BuildContext,
+    obj_ext: &str,
+) -> Result<Vec<String>, String> {
+    let mut objects = Vec::new();
+    for source in sources {
+        let obj_path = common::object_path(obj_dir, source, obj_ext);
+        if let Some(parent) = Path::new(&obj_path).parent() {
+            fs::create_dir_all(parent).map_err(|err| format!("obj dir error: {err}"))?;
+        }
+        if common::needs_rebuild(source, &obj_path) {
+            let mut cmd = Command::new(compiler);
+            cmd.arg("-c").arg(source).arg("-o").arg(&obj_path);
+            if ctx.kind == "sharedlib" {
+                cmd.arg("-fPIC");
+            }
+            if let Some(flag) = asm_lang_flag(source) {
+                cmd.arg("-x").arg(flag);
+            }
+            if let Some(platform) = ctx.platform
+                && !platform.trim().is_empty()
+            {
+                cmd.arg(format!("-march={}", platform));
+            }
+            if !ctx.standard.is_empty() && ctx.language.to_lowercase() != "asm" {
+                cmd.arg(format!("-std={}", ctx.standard));
+            }
+            if ctx.cflags.is_empty() {
+                for flag in default_flags(ctx.profile) {
+                    cmd.arg(flag);
+                }
+            }
+            for flag in ctx.cflags {
+                cmd.arg(flag);
+            }
+            for dir in ctx.include_dirs {
+                cmd.arg(format!("-I{dir}"));
+            }
+            let d_path = Path::new(&obj_path).with_extension("d");
+            cmd.arg("-MMD").arg("-MF").arg(&d_path);
+            if std::env::var("DCR_DEBUG").is_ok() {
+                eprintln!("[dcr] {:?}", cmd);
+            }
+            match cmd.status() {
+                Ok(status) if status.success() => {}
+                Ok(_) => return Err("Build failed".to_string()),
+                Err(err) => return Err(format!("Build failed: {err}")),
+            }
+        }
+        objects.push(obj_path);
+    }
+    Ok(objects)
+}
+
+fn asm_lang_flag(source: &str) -> Option<&'static str> {
+    let ext = Path::new(source).extension().and_then(|v| v.to_str())?;
+    match ext {
+        "S" => Some("assembler-with-cpp"),
+        "s" | "asm" => Some("assembler"),
+        _ => None,
+    }
+}

src/core/config.rs

@@ -7,6 +7,7 @@ const DEFAULT_VERSION: &str = "0.1.0";
 const DEFAULT_LANGUAGE: &str = "c";
 const DEFAULT_STANDARD: &str = "c11";
 const DEFAULT_COMPILER: &str = "clang";
+const DEFAULT_KIND: &str = "bin";
 
 #[derive(Debug)]
 pub enum ConfigError {
@@ -114,12 +115,108 @@ impl Config {
             .and_then(|v| v.as_table())
             .ok_or_else(|| ConfigError::Invalid("missing [build]".into()))?;
 
-        for key in ["language", "standard", "compiler"] {
+        if let Some(language) = build.get("language") {
+            self.validate_language(language)?;
+        } else {
+            return Err(ConfigError::Invalid("build.language is empty".into()));
+        }
+        for key in ["standard", "compiler"] {
             let value = build.get(key).and_then(|v| v.as_str()).unwrap_or("");
             if value.trim().is_empty() {
                 return Err(ConfigError::Invalid(format!("build.{key} is empty")));
             }
         }
+        if let Some(platform) = build.get("platform")
+            && !platform
+                .as_str()
+                .map(|v| !v.trim().is_empty())
+                .unwrap_or(false)
+        {
+            return Err(ConfigError::Invalid("build.platform is empty".into()));
+        }
+        if let Some(toolchain) = self.get("toolchain").and_then(|v| v.as_table()) {
+            for key in ["cc", "cxx", "as", "ar", "ld"] {
+                if let Some(v) = toolchain.get(key)
+                    && !v.as_str().map(|s| !s.trim().is_empty()).unwrap_or(false)
+                {
+                    return Err(ConfigError::Invalid(format!("toolchain.{key} is invalid")));
+                }
+            }
+        }
+        if let Some(kind) = build.get("kind").and_then(|v| v.as_str()) {
+            let kind = kind.trim();
+            if !kind.is_empty() && kind != "bin" && kind != "staticlib" && kind != "sharedlib" {
+                return Err(ConfigError::Invalid("build.kind is invalid".into()));
+            }
+        }
+        if let Some(exclude) = build.get("exclude") {
+            let arr = exclude.as_array().ok_or_else(|| {
+                ConfigError::Invalid("build.exclude must be an array of strings".into())
+            })?;
+            for item in arr {
+                let s = item.as_str().unwrap_or("");
+                if s.trim().is_empty() {
+                    return Err(ConfigError::Invalid(
+                        "build.exclude contains empty value".into(),
+                    ));
+                }
+            }
+        }
+        if let Some(include) = build.get("include") {
+            let arr = include.as_array().ok_or_else(|| {
+                ConfigError::Invalid("build.include must be an array of strings".into())
+            })?;
+            for item in arr {
+                let s = item.as_str().unwrap_or("");
+                if s.trim().is_empty() {
+                    return Err(ConfigError::Invalid(
+                        "build.include contains empty value".into(),
+                    ));
+                }
+            }
+        }
+        if let Some(roots) = build.get("roots") {
+            let arr = roots.as_array().ok_or_else(|| {
+                ConfigError::Invalid("build.roots must be an array of strings".into())
+            })?;
+            for item in arr {
+                let s = item.as_str().unwrap_or("");
+                if s.trim().is_empty() {
+                    return Err(ConfigError::Invalid(
+                        "build.roots contains empty value".into(),
+                    ));
+                }
+            }
+        }
+        if let Some(src_disable) = build.get("src_disable")
+            && !src_disable.is_bool()
+        {
+            return Err(ConfigError::Invalid(
+                "build.src_disable must be a boolean".into(),
+            ));
+        }
+        if let Some(clean) = build.get("clean") {
+            let arr = clean.as_array().ok_or_else(|| {
+                ConfigError::Invalid("build.clean must be an array of strings".into())
+            })?;
+            for item in arr {
+                let s = item.as_str().unwrap_or("");
+                if s.trim().is_empty() {
+                    return Err(ConfigError::Invalid(
+                        "build.clean contains empty value".into(),
+                    ));
+                }
+            }
+        }
+        for profile in ["release", "debug"] {
+            if let Some(section) = build.get(profile) {
+                let table = section.as_table().ok_or_else(|| {
+                    ConfigError::Invalid(format!("build.{profile} must be a table"))
+                })?;
+                self.validate_profile_section(profile, table)?;
+            }
+        }
+        self.validate_workspace()?;
         Ok(())
     }
 
@@ -135,6 +232,149 @@ impl Config {
     }
 }
 
+impl Config {
+    fn validate_language(&self, value: &Value) -> Result<(), ConfigError> {
+        if let Some(s) = value.as_str() {
+            if s.trim().is_empty() {
+                return Err(ConfigError::Invalid("build.language is empty".into()));
+            }
+            return Ok(());
+        }
+        let arr = value
+            .as_array()
+            .ok_or_else(|| ConfigError::Invalid("build.language must be string or array".into()))?;
+        if arr.is_empty() {
+            return Err(ConfigError::Invalid("build.language is empty".into()));
+        }
+        for item in arr {
+            let s = item.as_str().unwrap_or("");
+            if s.trim().is_empty() {
+                return Err(ConfigError::Invalid(
+                    "build.language contains empty value".into(),
+                ));
+            }
+        }
+        Ok(())
+    }
+
+    fn validate_profile_section(
+        &self,
+        profile: &str,
+        table: &toml::value::Table,
+    ) -> Result<(), ConfigError> {
+        if let Some(lang) = table.get("language") {
+            self.validate_language(lang)?;
+        }
+        for key in ["standard", "compiler", "kind", "target", "platform"] {
+            if let Some(value) = table.get(key) {
+                let s = value.as_str().unwrap_or("");
+                if s.trim().is_empty() {
+                    return Err(ConfigError::Invalid(format!(
+                        "build.{profile}.{key} is empty"
+                    )));
+                }
+            }
+        }
+        if let Some(kind) = table.get("kind").and_then(|v| v.as_str()) {
+            let kind = kind.trim();
+            if !kind.is_empty() && kind != "bin" && kind != "staticlib" && kind != "sharedlib" {
+                return Err(ConfigError::Invalid(format!(
+                    "build.{profile}.kind is invalid"
+                )));
+            }
+        }
+        if let Some(src_disable) = table.get("src_disable")
+            && !src_disable.is_bool()
+        {
+            return Err(ConfigError::Invalid(format!(
+                "build.{profile}.src_disable must be boolean"
+            )));
+        }
+        for key in [
+            "cflags",
+            "ldflags",
+            "exclude",
+            "include",
+            "roots",
+            "pkg_config",
+            "generated",
+            "expect",
+            "clean",
+            "targets",
+        ] {
+            if let Some(val) = table.get(key) {
+                let arr = val.as_array().ok_or_else(|| {
+                    ConfigError::Invalid(format!(
+                        "build.{profile}.{key} must be an array of strings"
+                    ))
+                })?;
+                for item in arr {
+                    let s = item.as_str().unwrap_or("");
+                    if s.trim().is_empty() {
+                        return Err(ConfigError::Invalid(format!(
+                            "build.{profile}.{key} contains empty value"
+                        )));
+                    }
+                }
+            }
+        }
+        for key in ["steps", "post_steps"] {
+            if let Some(val) = table.get(key) {
+                let arr = val.as_array().ok_or_else(|| {
+                    ConfigError::Invalid(format!("build.{profile}.{key} must be an array"))
+                })?;
+                for item in arr {
+                    let tbl = item.as_table().ok_or_else(|| {
+                        ConfigError::Invalid(format!(
+                            "build.{profile}.{key} entries must be tables"
+                        ))
+                    })?;
+                    for req in ["name", "in", "out", "cmd"] {
+                        let s = tbl.get(req).and_then(|v| v.as_str()).unwrap_or("");
+                        if s.trim().is_empty() {
+                            return Err(ConfigError::Invalid(format!(
+                                "build.{profile}.{key} missing {req}"
+                            )));
+                        }
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
+
+    fn validate_workspace(&self) -> Result<(), ConfigError> {
+        let Some(workspace) = self.get("workspace").and_then(|v| v.as_table()) else {
+            return Ok(());
+        };
+        for (name, value) in workspace {
+            let tbl = value
+                .as_table()
+                .ok_or_else(|| ConfigError::Invalid(format!("workspace.{name} must be a table")))?;
+            let path = tbl.get("path").and_then(|v| v.as_str()).unwrap_or("");
+            if path.trim().is_empty() {
+                return Err(ConfigError::Invalid(format!(
+                    "workspace.{name}.path is empty"
+                )));
+            }
+            if let Some(deps) = tbl.get("deps") {
+                let arr = deps.as_array().ok_or_else(|| {
+                    ConfigError::Invalid(format!("workspace.{name}.deps must be array"))
+                })?;
+                for item in arr {
+                    let s = item.as_str().unwrap_or("");
+                    if s.trim().is_empty() {
+                        return Err(ConfigError::Invalid(format!(
+                            "workspace.{name}.deps contains empty value"
+                        )));
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
 fn read_toml(path: &Path) -> Result<Value, ConfigError> {
     let content = fs::read_to_string(path)?;
     Ok(toml::from_str(&content)?)
@@ -171,6 +411,7 @@ fn default_toml() -> Result<Value, ConfigError> {
         "compiler".to_string(),
         Value::String(DEFAULT_COMPILER.to_string()),
     );
+    build.insert("kind".to_string(), Value::String(DEFAULT_KIND.to_string()));
 
     let mut root = Map::new();
     root.insert("package".to_string(), Value::Table(package));
@@ -197,6 +438,7 @@ fn format_toml(value: &Value) -> Result<String, ConfigError> {
         .get("dependencies")
         .and_then(|v| v.as_table())
         .ok_or_else(|| ConfigError::Invalid("missing [dependencies]".into()))?;
+    let toolchain = root.get("toolchain").and_then(|v| v.as_table());
 
     let name = package.get("name").and_then(|v| v.as_str()).unwrap_or("");
     let version = package
@@ -204,7 +446,12 @@ fn format_toml(value: &Value) -> Result<String, ConfigError> {
         .and_then(|v| v.as_str())
         .unwrap_or("");
 
-    let language = build.get("language").and_then(|v| v.as_str()).unwrap_or("");
+    let language_value = build.get("language");
+    let language = match language_value {
+        Some(Value::String(s)) => s.to_string(),
+        Some(Value::Array(arr)) => format_string_array(&Value::Array(arr.clone())),
+        _ => "".to_string(),
+    };
     let standard = build.get("standard").and_then(|v| v.as_str()).unwrap_or("");
     let compiler = build.get("compiler").and_then(|v| v.as_str()).unwrap_or("");
 
@@ -214,22 +461,99 @@ fn format_toml(value: &Value) -> Result<String, ConfigError> {
     out.push_str(&format!("version = \"{version}\"\n\n"));
 
     out.push_str("[build]\n");
-    out.push_str(&format!("language = \"{language}\"\n"));
+    if language.starts_with('[') {
+        out.push_str(&format!("language = {language}\n"));
+    } else {
+        out.push_str(&format!("language = \"{language}\"\n"));
+    }
     out.push_str(&format!("standard = \"{standard}\"\n"));
-    out.push_str(&format!("compiler = \"{compiler}\"\n\n"));
+    out.push_str(&format!("compiler = \"{compiler}\"\n"));
+    let kind = build
+        .get("kind")
+        .and_then(|v| v.as_str())
+        .unwrap_or(DEFAULT_KIND);
+    out.push_str(&format!("kind = \"{kind}\"\n"));
+    if let Some(target) = build.get("target").and_then(|v| v.as_str())
+        && !target.trim().is_empty()
+    {
+        out.push_str(&format!("target = \"{target}\"\n"));
+    }
+    if let Some(cflags) = build.get("cflags") {
+        out.push_str(&format!("cflags = {}\n", format_string_array(cflags)));
+    }
+    if let Some(ldflags) = build.get("ldflags") {
+        out.push_str(&format!("ldflags = {}\n", format_string_array(ldflags)));
+    }
+    out.push('\n');
+
+    if let Some(toolchain) = toolchain {
+        let mut lines = Vec::new();
+        for key in ["cc", "cxx", "as", "ar", "ld"] {
+            if let Some(value) = toolchain.get(key).and_then(|v| v.as_str())
+                && !value.trim().is_empty()
+            {
+                lines.push(format!("{key} = \"{value}\""));
+            }
+        }
+        if !lines.is_empty() {
+            out.push_str("[toolchain]\n");
+            for line in lines {
+                out.push_str(&format!("{line}\n"));
+            }
+            out.push('\n');
+        }
+    }
 
     out.push_str("[dependencies]\n");
     if !deps.is_empty() {
         let mut keys: Vec<&String> = deps.keys().collect();
         keys.sort();
         for key in keys {
-            let val = deps.get(key).and_then(|v| v.as_str()).unwrap_or("");
-            out.push_str(&format!("{key} = \"{val}\"\n"));
+            if let Some(val) = deps.get(key) {
+                out.push_str(&format!("{key} = {}\n", format_dep_value(val)));
+            }
         }
     }
     Ok(out)
 }
 
+fn format_dep_value(value: &Value) -> String {
+    match value {
+        Value::String(s) => format!("\"{s}\""),
+        Value::Table(tbl) => {
+            let mut parts = Vec::new();
+            if let Some(v) = tbl.get("path").and_then(|v| v.as_str()) {
+                parts.push(format!("path = \"{v}\""));
+            }
+            if let Some(v) = tbl.get("system").and_then(|v| v.as_bool()) {
+                parts.push(format!("system = {}", if v { "true" } else { "false" }));
+            }
+            if let Some(v) = tbl.get("include") {
+                parts.push(format!("include = {}", format_string_array(v)));
+            }
+            if let Some(v) = tbl.get("lib") {
+                parts.push(format!("lib = {}", format_string_array(v)));
+            }
+            if let Some(v) = tbl.get("libs") {
+                parts.push(format!("libs = {}", format_string_array(v)));
+            }
+            format!("{{ {} }}", parts.join(", "))
+        }
+        _ => "\"\"".to_string(),
+    }
+}
+
+fn format_string_array(value: &Value) -> String {
+    if let Some(arr) = value.as_array() {
+        let items: Vec<String> = arr
+            .iter()
+            .filter_map(|v| v.as_str().map(|s| format!("\"{s}\"")))
+            .collect();
+        return format!("[{}]", items.join(", "));
+    }
+    "[]".to_string()
+}
+
 fn get_path<'a>(value: &'a Value, path: &[&str]) -> Option<&'a Value> {
     let mut current = value;
     for key in path {
@@ -260,3 +584,220 @@ fn set_path(value: &mut Value, path: &[&str], new_value: Value) -> Result<(), Co
         Err(ConfigError::Invalid("empty key".into()))
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::sync::atomic::{AtomicUsize, Ordering};
+
+    static TEST_COUNTER: AtomicUsize = AtomicUsize::new(0);
+
+    fn temp_dir(prefix: &str) -> PathBuf {
+        let n = TEST_COUNTER.fetch_add(1, Ordering::SeqCst);
+        let dir = std::env::temp_dir().join(format!("dcr_cfg_test_{prefix}_{n}"));
+        let _ = fs::remove_dir_all(&dir);
+        fs::create_dir_all(&dir).unwrap();
+        dir
+    }
+
+    fn write_toml_file(dir: &Path, content: &str) -> PathBuf {
+        let path = dir.join("dcr.toml");
+        fs::write(&path, content).unwrap();
+        path
+    }
+
+    fn minimal_valid_toml() -> &'static str {
+        "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = \"c\"\nstandard = \"c11\"\ncompiler = \"clang\"\nkind = \"bin\"\n\n[dependencies]\n"
+    }
+
+    #[test]
+    fn open_valid_toml() {
+        let dir = temp_dir("open_valid");
+        let path = write_toml_file(&dir, minimal_valid_toml());
+        let config = Config::open(&path.to_string_lossy());
+        assert!(config.is_ok(), "should open valid toml");
+    }
+
+    #[test]
+    fn open_invalid_toml_syntax() {
+        let dir = temp_dir("open_invalid");
+        let path = write_toml_file(&dir, "this is not [valid toml !!!");
+        let config = Config::open(&path.to_string_lossy());
+        assert!(config.is_err(), "should fail on invalid TOML syntax");
+    }
+
+    #[test]
+    fn open_nonexistent_fails() {
+        let result = Config::open("/tmp/dcr_nonexistent_file_12345.toml");
+        assert!(result.is_err(), "should fail on nonexistent file");
+    }
+
+    #[test]
+    fn validate_missing_package_fails() {
+        let dir = temp_dir("no_package");
+        let path = write_toml_file(
+            &dir,
+            "[build]\nlanguage = \"c\"\nstandard = \"c11\"\ncompiler = \"clang\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(result.is_err(), "missing [package] should fail validation");
+    }
+
+    #[test]
+    fn validate_missing_build_fails() {
+        let dir = temp_dir("no_build");
+        let path = write_toml_file(
+            &dir,
+            "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(result.is_err(), "missing [build] should fail validation");
+    }
+
+    #[test]
+    fn validate_empty_language_fails() {
+        let dir = temp_dir("empty_lang");
+        let path = write_toml_file(
+            &dir,
+            "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = \"\"\nstandard = \"c11\"\ncompiler = \"clang\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(result.is_err(), "empty language should fail validation");
+    }
+
+    #[test]
+    fn validate_language_array() {
+        let dir = temp_dir("lang_array");
+        let path = write_toml_file(
+            &dir,
+            "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = [\"c\", \"c++\", \"asm\"]\nstandard = \"c11\"\ncompiler = \"clang\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(result.is_ok(), "language array should be valid");
+    }
+
+    #[test]
+    fn validate_language_array_empty_fails() {
+        let dir = temp_dir("lang_array_empty");
+        let path = write_toml_file(
+            &dir,
+            "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = []\nstandard = \"c11\"\ncompiler = \"clang\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(result.is_err(), "empty language array should fail");
+    }
+
+    #[test]
+    fn validate_unknown_kind_fails() {
+        let dir = temp_dir("bad_kind");
+        let path = write_toml_file(
+            &dir,
+            "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = \"c\"\nstandard = \"c11\"\ncompiler = \"clang\"\nkind = \"exe\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(result.is_err(), "unknown kind 'exe' should fail validation");
+    }
+
+    #[test]
+    fn validate_valid_kinds() {
+        for kind in ["bin", "staticlib", "sharedlib"] {
+            let dir = temp_dir(&format!("kind_{kind}"));
+            let content = format!(
+                "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = \"c\"\nstandard = \"c11\"\ncompiler = \"clang\"\nkind = \"{kind}\"\n\n[dependencies]\n"
+            );
+            let path = write_toml_file(&dir, &content);
+            let result = Config::open(&path.to_string_lossy());
+            assert!(result.is_ok(), "kind '{kind}' should be valid");
+        }
+    }
+
+    #[test]
+    fn get_values() {
+        let dir = temp_dir("get_values");
+        let path = write_toml_file(&dir, minimal_valid_toml());
+        let config = Config::open(&path.to_string_lossy()).unwrap();
+
+        assert_eq!(
+            config.get("package.name").and_then(|v| v.as_str()),
+            Some("test")
+        );
+        assert_eq!(
+            config.get("build.language").and_then(|v| v.as_str()),
+            Some("c")
+        );
+        assert_eq!(
+            config.get("build.kind").and_then(|v| v.as_str()),
+            Some("bin")
+        );
+        assert!(config.get("nonexistent.key").is_none());
+    }
+
+    #[test]
+    fn set_and_read_back() {
+        let dir = temp_dir("set_value");
+        let path = write_toml_file(&dir, minimal_valid_toml());
+        let mut config = Config::open(&path.to_string_lossy()).unwrap();
+
+        config
+            .set("package.name", Value::String("newname".to_string()))
+            .unwrap();
+        assert_eq!(
+            config.get("package.name").and_then(|v| v.as_str()),
+            Some("newname")
+        );
+
+        // Verify persisted to disk
+        let config2 = Config::open(&path.to_string_lossy()).unwrap();
+        assert_eq!(
+            config2.get("package.name").and_then(|v| v.as_str()),
+            Some("newname")
+        );
+    }
+
+    #[test]
+    fn new_creates_default_config() {
+        let dir = temp_dir("new_default");
+        let path = dir.join("dcr.toml");
+        let config = Config::new(&path.to_string_lossy()).unwrap();
+
+        assert!(path.exists(), "dcr.toml should be created");
+        assert_eq!(
+            config.get("build.language").and_then(|v| v.as_str()),
+            Some("c")
+        );
+        assert_eq!(
+            config.get("build.standard").and_then(|v| v.as_str()),
+            Some("c11")
+        );
+        assert_eq!(
+            config.get("build.compiler").and_then(|v| v.as_str()),
+            Some("clang")
+        );
+        assert_eq!(
+            config.get("build.kind").and_then(|v| v.as_str()),
+            Some("bin")
+        );
+    }
+
+    #[test]
+    fn validate_workspace_empty_path_fails() {
+        let dir = temp_dir("ws_empty_path");
+        let path = write_toml_file(
+            &dir,
+            "[package]\nname = \"test\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = \"c\"\nstandard = \"c11\"\ncompiler = \"clang\"\n\n[workspace]\n[workspace.member1]\npath = \"\"\n\n[dependencies]\n",
+        );
+        let result = Config::open(&path.to_string_lossy());
+        assert!(
+            result.is_err(),
+            "workspace member with empty path should fail"
+        );
+    }
+
+    #[test]
+    fn check_returns_bool() {
+        let dir = temp_dir("check_bool");
+        let path = write_toml_file(&dir, minimal_valid_toml());
+        let config = Config::open(&path.to_string_lossy()).unwrap();
+        assert!(config.check(), "valid config should return true");
+    }
+}

src/core/deps.rs

@@ -0,0 +1,390 @@
+use crate::core::config::Config;
+use sha2::{Digest, Sha256};
+use std::fs;
+use std::path::{Path, PathBuf};
+use toml::Value;
+
+#[derive(Debug, Clone)]
+pub struct DepSpec {
+    pub name: String,
+    pub path_raw: String,
+    pub include_raw: Option<Vec<String>>,
+    pub lib_raw: Option<Vec<String>>,
+    pub libs_raw: Option<Vec<String>>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ResolvedDeps {
+    pub include_dirs: Vec<String>,
+    pub lib_dirs: Vec<String>,
+    pub libs: Vec<String>,
+}
+
+pub fn resolve_deps(
+    config: &Config,
+    profile: &str,
+    target: Option<&str>,
+    project_root: &Path,
+) -> Result<ResolvedDeps, String> {
+    let project_name = config
+        .get("package.name")
+        .and_then(|v| v.as_str())
+        .unwrap_or("")
+        .to_string();
+    let project_version = config
+        .get("package.version")
+        .and_then(|v| v.as_str())
+        .unwrap_or("")
+        .to_string();
+    let deps = parse_dependencies(config, profile, target)?;
+    if deps.is_empty() {
+        return Ok(ResolvedDeps {
+            include_dirs: Vec::new(),
+            lib_dirs: Vec::new(),
+            libs: Vec::new(),
+        });
+    }
+
+    let mut include_dirs = Vec::new();
+    let mut lib_dirs = Vec::new();
+    let mut libs = Vec::new();
+    let mut lock_packages = Vec::new();
+
+    for dep in deps {
+        let dep_path_raw = expand_profile(&dep.path_raw, profile);
+        let dep_path = resolve_path(project_root, &dep_path_raw)?;
+        if !dep_path.is_dir() {
+            return Err(format!(
+                "Dependency '{}' path is not a directory: {}",
+                dep.name,
+                dep_path.display()
+            ));
+        }
+
+        let include = resolve_paths(&dep_path, dep.include_raw.as_deref(), &["include"], profile)?;
+        let lib = resolve_paths(
+            &dep_path,
+            dep.lib_raw.as_deref(),
+            &["lib", "lib64"],
+            profile,
+        )?;
+        let libs_list = dep
+            .libs_raw
+            .clone()
+            .unwrap_or_else(|| vec![dep.name.clone()]);
+
+        if include.is_empty() || lib.is_empty() {
+            return Err(format!(
+                "Dependency '{}' missing include/lib dirs. Add include/lib in dcr.toml.",
+                dep.name
+            ));
+        }
+
+        include_dirs.extend(include.iter().map(|p| p.to_string_lossy().to_string()));
+        lib_dirs.extend(lib.iter().map(|p| p.to_string_lossy().to_string()));
+        libs.extend(libs_list.iter().cloned());
+
+        let dep_cache = project_root
+            .join("target")
+            .join(profile)
+            .join("deps")
+            .join(&dep.name);
+        sync_dep_dir(&dep_path, &dep_cache)
+            .map_err(|err| format!("Failed to sync dep {}: {err}", dep.name))?;
+
+        let dep_version = read_dep_version(&dep_path).unwrap_or_else(|| "0.0.0".to_string());
+        let dep_checksum = compute_checksum(&dep_path)
+            .map_err(|err| format!("Failed to hash dep {}: {err}", dep.name))?;
+        lock_packages.push(DepLock {
+            name: dep.name.clone(),
+            version: dep_version,
+            checksum: dep_checksum,
+            source: format!("path+{}", dep.path_raw),
+        });
+    }
+
+    write_lock(
+        project_root,
+        &project_name,
+        &project_version,
+        &lock_packages,
+    )?;
+
+    Ok(ResolvedDeps {
+        include_dirs,
+        lib_dirs,
+        libs,
+    })
+}
+
+#[derive(Debug, Clone)]
+struct DepLock {
+    name: String,
+    version: String,
+    checksum: String,
+    source: String,
+}
+
+fn parse_dependencies(
+    config: &Config,
+    profile: &str,
+    target: Option<&str>,
+) -> Result<Vec<DepSpec>, String> {
+    let mut deps_table = None;
+    // Order: dependencies.target.profile, dependencies.profile.target, dependencies.target, dependencies.profile, dependencies
+    let combinations = if let Some(t) = target {
+        let normalized_t = crate::cli::build::normalize_target_os(t);
+        vec![
+            format!("dependencies.{}.{}", normalized_t, profile),
+            format!("dependencies.{}.{}", profile, normalized_t),
+            format!("dependencies.{}", normalized_t),
+            format!("dependencies.{}", profile),
+            "dependencies".to_string(),
+        ]
+    } else {
+        vec![
+            format!("dependencies.{}", profile),
+            "dependencies".to_string(),
+        ]
+    };
+    for key in combinations {
+        if let Some(val) = config.get(&key).and_then(|v| v.as_table()) {
+            deps_table = Some(val);
+            break;
+        }
+    }
+    let deps_table = match deps_table {
+        Some(t) => t,
+        None => return Ok(Vec::new()),
+    };
+    let mut deps = Vec::new();
+    for (name, value) in deps_table {
+        match value {
+            Value::Table(tbl) => {
+                if tbl.get("system").and_then(|v| v.as_bool()).unwrap_or(false) {
+                    return Err(format!(
+                        "Dependency '{}' uses system=true, which is not supported yet",
+                        name
+                    ));
+                }
+                let path = tbl
+                    .get("path")
+                    .and_then(|v| v.as_str())
+                    .ok_or_else(|| format!("Dependency '{}' missing path", name))?
+                    .to_string();
+                let include = parse_string_list(tbl.get("include"), name, "include")?;
+                let lib = parse_string_list(tbl.get("lib"), name, "lib")?;
+                let libs = parse_string_list(tbl.get("libs"), name, "libs")?;
+                deps.push(DepSpec {
+                    name: name.to_string(),
+                    path_raw: path,
+                    include_raw: include,
+                    lib_raw: lib,
+                    libs_raw: libs,
+                });
+            }
+            _ => {
+                return Err(format!(
+                    "Dependency '{}' must be a table with path/include/lib",
+                    name
+                ));
+            }
+        }
+    }
+    deps.sort_by(|a, b| a.name.cmp(&b.name));
+    Ok(deps)
+}
+
+fn parse_string_list(
+    value: Option<&Value>,
+    dep_name: &str,
+    key: &str,
+) -> Result<Option<Vec<String>>, String> {
+    let Some(value) = value else { return Ok(None) };
+    let list = value.as_array().ok_or_else(|| {
+        format!(
+            "Dependency '{}' field '{}' must be an array of strings",
+            dep_name, key
+        )
+    })?;
+    let mut out = Vec::new();
+    for item in list {
+        let s = item
+            .as_str()
+            .ok_or_else(|| format!("Dependency '{}' field '{}' must be strings", dep_name, key))?;
+        out.push(s.to_string());
+    }
+    Ok(Some(out))
+}
+
+fn resolve_path(project_root: &Path, raw: &str) -> Result<PathBuf, String> {
+    let p = Path::new(raw);
+    let full = if p.is_absolute() {
+        p.to_path_buf()
+    } else {
+        project_root.join(p)
+    };
+    Ok(full)
+}
+
+fn resolve_paths(
+    base: &Path,
+    raw: Option<&[String]>,
+    defaults: &[&str],
+    profile: &str,
+) -> Result<Vec<PathBuf>, String> {
+    let mut out = Vec::new();
+    if let Some(raw) = raw {
+        for r in raw {
+            let expanded = expand_profile(r, profile);
+            let p = Path::new(&expanded);
+            let full = if p.is_absolute() {
+                p.to_path_buf()
+            } else {
+                base.join(p)
+            };
+            if !full.exists() {
+                return Err(format!("Path does not exist: {}", full.display()));
+            }
+            out.push(full);
+        }
+        return Ok(out);
+    }
+
+    for d in defaults {
+        let candidate = base.join(d);
+        if candidate.exists() {
+            out.push(candidate);
+        }
+    }
+    Ok(out)
+}
+
+fn expand_profile(raw: &str, profile: &str) -> String {
+    raw.replace("{profile}", profile)
+}
+
+fn sync_dep_dir(src: &Path, dst: &Path) -> std::io::Result<()> {
+    if dst.exists() {
+        fs::remove_dir_all(dst)?;
+    }
+    copy_dir_all(src, dst)
+}
+
+fn copy_dir_all(src: &Path, dst: &Path) -> std::io::Result<()> {
+    fs::create_dir_all(dst)?;
+    for entry in fs::read_dir(src)? {
+        let entry = entry?;
+        let ty = entry.file_type()?;
+        let from = entry.path();
+        let to = dst.join(entry.file_name());
+        if ty.is_dir() {
+            copy_dir_all(&from, &to)?;
+        } else {
+            fs::copy(&from, &to)?;
+        }
+    }
+    Ok(())
+}
+
+fn write_lock(
+    project_root: &Path,
+    project_name: &str,
+    project_version: &str,
+    packages: &[DepLock],
+) -> Result<(), String> {
+    let mut out = String::new();
+    if !packages.is_empty() {
+        out.push_str("[[package]]\n");
+        out.push_str(&format!("name = \"{}\"\n", escape_value(project_name)));
+        out.push_str(&format!(
+            "version = \"{}\"\n",
+            escape_value(project_version)
+        ));
+        out.push_str(&format!(
+            "dependencies = [{}]\n\n",
+            quote_list(&packages.iter().map(|p| p.name.clone()).collect::<Vec<_>>())
+        ));
+    }
+    for pkg in packages {
+        out.push_str("[[package]]\n");
+        out.push_str(&format!("name = \"{}\"\n", escape_value(&pkg.name)));
+        out.push_str(&format!("version = \"{}\"\n", escape_value(&pkg.version)));
+        out.push_str(&format!("source = \"{}\"\n", escape_value(&pkg.source)));
+        out.push_str(&format!("checksum = \"{}\"\n", escape_value(&pkg.checksum)));
+        out.push('\n');
+    }
+    fs::write(project_root.join("dcr.lock"), out)
+        .map_err(|err| format!("Failed to write dcr.lock: {err}"))?;
+    Ok(())
+}
+
+fn quote_list(items: &[String]) -> String {
+    items
+        .iter()
+        .map(|s| format!("\"{}\"", escape_value(s)))
+        .collect::<Vec<_>>()
+        .join(", ")
+}
+
+fn escape_value(input: &str) -> String {
+    input.replace('\\', "\\\\").replace('"', "\\\"")
+}
+
+fn read_dep_version(dep_path: &Path) -> Option<String> {
+    let path = dep_path.join("dcr.toml");
+    let content = fs::read_to_string(path).ok()?;
+    let value: Value = content.parse().ok()?;
+    value
+        .get("package")
+        .and_then(|v| v.as_table())
+        .and_then(|t| t.get("version"))
+        .and_then(|v| v.as_str())
+        .map(|s| s.to_string())
+}
+
+fn compute_checksum(root: &Path) -> Result<String, String> {
+    let mut files = Vec::new();
+    collect_files(root, root, &mut files)?;
+    files.sort();
+    let mut hasher = Sha256::new();
+    for rel in files {
+        hasher.update(rel.as_bytes());
+        let data =
+            fs::read(root.join(&rel)).map_err(|err| format!("failed to read {}: {err}", rel))?;
+        hasher.update(&data);
+    }
+    let hash = hasher.finalize();
+    Ok(to_hex(&hash))
+}
+
+fn collect_files(root: &Path, dir: &Path, out: &mut Vec<String>) -> Result<(), String> {
+    for entry in fs::read_dir(dir).map_err(|err| format!("read_dir failed: {err}"))? {
+        let entry = entry.map_err(|err| format!("read_dir failed: {err}"))?;
+        let path = entry.path();
+        let name = entry.file_name();
+        let name_str = name.to_string_lossy();
+        if name_str == "target" {
+            continue;
+        }
+        if path.is_dir() {
+            collect_files(root, &path, out)?;
+        } else if path.is_file() {
+            let rel = path
+                .strip_prefix(root)
+                .unwrap_or(&path)
+                .to_string_lossy()
+                .to_string();
+            out.push(rel);
+        }
+    }
+    Ok(())
+}
+
+fn to_hex(bytes: &[u8]) -> String {
+    let mut out = String::with_capacity(bytes.len() * 2);
+    for b in bytes {
+        out.push_str(&format!("{:02x}", b));
+    }
+    out
+}

src/core/mod.rs

@@ -1,2 +1,5 @@
 pub mod builder;
 pub mod config;
+pub mod deps;
+pub mod runner;
+pub mod workspace;

src/core/runner.rs

@@ -0,0 +1,37 @@
+use crate::platform;
+use crate::utils::fs::check_dir;
+use crate::utils::log::warn;
+use std::path::Path;
+use std::process::Command;
+
+pub fn run_binary(project_name: &str, profile: &str, target_dir: Option<&str>) -> i32 {
+    let bin_path = platform::bin_path(profile, project_name, target_dir);
+    if Path::new(&bin_path).exists() {
+        return Command::new(bin_path)
+            .status()
+            .map(|status| status.code().unwrap_or(1))
+            .unwrap_or(1);
+    }
+
+    if target_dir.is_none()
+        && check_dir(Some(&format!("target/{profile}")))
+            .unwrap_or_default()
+            .contains(&profile.to_string())
+    {
+        warn("Launch of the latest release");
+        return Command::new(platform::bin_path(profile, project_name, target_dir))
+            .status()
+            .map(|status| status.code().unwrap_or(1))
+            .unwrap_or(1);
+    }
+
+    if target_dir.is_some() && Path::new(&bin_path).exists() {
+        warn("Launch of the latest release");
+        return Command::new(bin_path)
+            .status()
+            .map(|status| status.code().unwrap_or(1))
+            .unwrap_or(1);
+    }
+
+    1
+}

src/core/workspace.rs

@@ -0,0 +1,149 @@
+use crate::core::config::Config;
+use std::collections::{HashMap, HashSet};
+use std::path::{Path, PathBuf};
+use toml::Value;
+
+#[derive(Debug, Clone)]
+pub struct WorkspaceMember {
+    pub name: String,
+    pub path: PathBuf,
+    pub deps: Vec<String>,
+}
+
+#[derive(Debug, Clone)]
+pub struct Workspace {
+    pub members: Vec<WorkspaceMember>,
+}
+
+pub fn parse_workspace(
+    config: &Config,
+    profile: &str,
+    target: Option<&str>,
+    root: &Path,
+) -> Result<Option<Workspace>, String> {
+    let mut table = None;
+    // Order: workspace.target.profile, workspace.profile.target, workspace.target, workspace.profile, workspace
+    let combinations = if let Some(t) = target {
+        let normalized_t = crate::cli::build::normalize_target_os(t);
+        vec![
+            format!("workspace.{}.{}", normalized_t, profile),
+            format!("workspace.{}.{}", profile, normalized_t),
+            format!("workspace.{}", normalized_t),
+            format!("workspace.{}", profile),
+            "workspace".to_string(),
+        ]
+    } else {
+        vec![format!("workspace.{}", profile), "workspace".to_string()]
+    };
+    for key in combinations {
+        if let Some(val) = config.get(&key).and_then(|v| v.as_table()) {
+            table = Some(val);
+            break;
+        }
+    }
+    let table = match table {
+        Some(t) => t,
+        None => return Ok(None),
+    };
+
+    let mut members = Vec::new();
+    for (name, value) in table {
+        let tbl = value
+            .as_table()
+            .ok_or_else(|| format!("workspace.{name} must be a table with path and deps"))?;
+        let path_raw = tbl
+            .get("path")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| format!("workspace.{name}.path is required"))?;
+        let path = resolve_path(root, path_raw)?;
+        if !path.join("dcr.toml").is_file() {
+            return Err(format!(
+                "workspace.{name}.path does not contain dcr.toml: {}",
+                path.display()
+            ));
+        }
+        let deps = parse_deps(tbl.get("deps"))?;
+        members.push(WorkspaceMember {
+            name: name.to_string(),
+            path,
+            deps,
+        });
+    }
+
+    let mut ws = Workspace { members };
+    ws.members = topo_sort(&ws.members)?;
+    Ok(Some(ws))
+}
+
+fn resolve_path(root: &Path, raw: &str) -> Result<PathBuf, String> {
+    let p = Path::new(raw);
+    let full = if p.is_absolute() {
+        p.to_path_buf()
+    } else {
+        root.join(p)
+    };
+    Ok(full)
+}
+
+fn parse_deps(value: Option<&Value>) -> Result<Vec<String>, String> {
+    let Some(value) = value else {
+        return Ok(Vec::new());
+    };
+    let arr = value
+        .as_array()
+        .ok_or_else(|| "workspace deps must be an array of strings".to_string())?;
+    let mut out = Vec::new();
+    for item in arr {
+        let s = item
+            .as_str()
+            .ok_or_else(|| "workspace deps must be an array of strings".to_string())?;
+        out.push(s.to_string());
+    }
+    Ok(out)
+}
+
+fn topo_sort(members: &[WorkspaceMember]) -> Result<Vec<WorkspaceMember>, String> {
+    let mut map = HashMap::new();
+    for m in members {
+        map.insert(m.name.clone(), m.clone());
+    }
+    let mut state: HashMap<String, u8> = HashMap::new();
+    let mut order: Vec<WorkspaceMember> = Vec::new();
+
+    for name in map.keys() {
+        if *state.get(name).unwrap_or(&0) == 0 {
+            visit(name, &map, &mut state, &mut order)?;
+        }
+    }
+    Ok(order)
+}
+
+fn visit(
+    name: &str,
+    map: &HashMap<String, WorkspaceMember>,
+    state: &mut HashMap<String, u8>,
+    order: &mut Vec<WorkspaceMember>,
+) -> Result<(), String> {
+    match state.get(name).copied().unwrap_or(0) {
+        1 => return Err(format!("workspace dependency cycle at {name}")),
+        2 => return Ok(()),
+        _ => {}
+    }
+    state.insert(name.to_string(), 1);
+    let member = map
+        .get(name)
+        .ok_or_else(|| format!("unknown workspace member {name}"))?;
+    let mut seen = HashSet::new();
+    for dep in &member.deps {
+        if !seen.insert(dep) {
+            continue;
+        }
+        if !map.contains_key(dep) {
+            return Err(format!("workspace dependency '{dep}' not found"));
+        }
+        visit(dep, map, state, order)?;
+    }
+    state.insert(name.to_string(), 2);
+    order.push(member.clone());
+    Ok(())
+}

src/main.rs

@@ -20,7 +20,9 @@ fn main() {
         "init" => cli::init::init(rest),
         "build" => cli::build::build(rest),
         "run" => cli::run::run(rest),
+        "test" | "tests" => cli::test::test(rest),
         "clean" => cli::clean::clean(rest),
+        "gen" => cli::r#gen::r#gen(rest),
         "--version" => {
             println!("dcr {} ({})", env!("CARGO_PKG_VERSION"), env!("DCR_TARGET"));
             0

src/platform/linux.rs

@@ -1,3 +1,74 @@
-pub fn bin_path(profile: &str, name: &str) -> String {
-    format!("./target/{profile}/{name}")
+pub fn bin_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/{}", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/{name}"),
+    }
+}
+
+pub fn lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/lib{}.a", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/lib{name}.a"),
+    }
+}
+
+pub fn shared_lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/lib{}.so", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/lib{name}.so"),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn bin_path_default() {
+        assert_eq!(bin_path("debug", "hello", None), "./target/debug/hello");
+    }
+
+    #[test]
+    fn bin_path_release() {
+        assert_eq!(bin_path("release", "hello", None), "./target/release/hello");
+    }
+
+    #[test]
+    fn bin_path_custom_target() {
+        assert_eq!(bin_path("debug", "hello", Some("out")), "out/hello");
+    }
+
+    #[test]
+    fn bin_path_custom_target_trailing_slash() {
+        assert_eq!(bin_path("debug", "hello", Some("out/")), "out/hello");
+    }
+
+    #[test]
+    fn lib_path_default() {
+        assert_eq!(
+            lib_path("debug", "mylib", None),
+            "./target/debug/libmylib.a"
+        );
+    }
+
+    #[test]
+    fn lib_path_custom_target() {
+        assert_eq!(lib_path("debug", "mylib", Some("out")), "out/libmylib.a");
+    }
+
+    #[test]
+    fn shared_lib_path_default() {
+        assert_eq!(
+            shared_lib_path("debug", "mylib", None),
+            "./target/debug/libmylib.so"
+        );
+    }
+
+    #[test]
+    fn shared_lib_path_custom_target() {
+        assert_eq!(
+            shared_lib_path("release", "mylib", Some("dist")),
+            "dist/libmylib.so"
+        );
+    }
 }

src/platform/macos.rs

@@ -1,3 +1,20 @@
-pub fn bin_path(profile: &str, name: &str) -> String {
-    format!("./target/{profile}/{name}")
+pub fn bin_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/{}", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/{name}"),
+    }
+}
+
+pub fn lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/lib{}.a", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/lib{name}.a"),
+    }
+}
+
+pub fn shared_lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/lib{}.dylib", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/lib{name}.dylib"),
+    }
 }

src/platform/mod.rs

@@ -5,21 +5,68 @@ pub mod macos;
 #[cfg(target_os = "windows")]
 pub mod windows;
 
-pub fn bin_path(profile: &str, name: &str) -> String {
+pub fn bin_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
     #[cfg(target_os = "linux")]
     {
-        linux::bin_path(profile, name)
+        linux::bin_path(profile, name, target_dir)
     }
     #[cfg(target_os = "macos")]
     {
-        return macos::bin_path(profile, name);
+        return macos::bin_path(profile, name, target_dir);
     }
     #[cfg(target_os = "windows")]
     {
-        return windows::bin_path(profile, name);
+        return windows::bin_path(profile, name, target_dir);
     }
     #[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
     {
-        format!("./target/{profile}/{name}")
+        match target_dir {
+            Some(dir) => format!("{}/{}", dir.trim_end_matches('/'), name),
+            None => format!("./target/{profile}/{name}"),
+        }
+    }
+}
+
+pub fn lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    #[cfg(target_os = "linux")]
+    {
+        linux::lib_path(profile, name, target_dir)
+    }
+    #[cfg(target_os = "macos")]
+    {
+        return macos::lib_path(profile, name, target_dir);
+    }
+    #[cfg(target_os = "windows")]
+    {
+        return windows::lib_path(profile, name, target_dir);
+    }
+    #[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
+    {
+        match target_dir {
+            Some(dir) => format!("{}/lib{}.a", dir.trim_end_matches('/'), name),
+            None => format!("./target/{profile}/lib{name}.a"),
+        }
+    }
+}
+
+pub fn shared_lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    #[cfg(target_os = "linux")]
+    {
+        linux::shared_lib_path(profile, name, target_dir)
+    }
+    #[cfg(target_os = "macos")]
+    {
+        return macos::shared_lib_path(profile, name, target_dir);
+    }
+    #[cfg(target_os = "windows")]
+    {
+        return windows::shared_lib_path(profile, name, target_dir);
+    }
+    #[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
+    {
+        match target_dir {
+            Some(dir) => format!("{}/lib{}.so", dir.trim_end_matches('/'), name),
+            None => format!("./target/{profile}/lib{name}.so"),
+        }
     }
 }

src/platform/windows.rs

@@ -1,3 +1,20 @@
-pub fn bin_path(profile: &str, name: &str) -> String {
-    format!("./target/{profile}/{name}.exe")
+pub fn bin_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/{}.exe", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/{name}.exe"),
+    }
+}
+
+pub fn lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/{}.lib", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/{name}.lib"),
+    }
+}
+
+pub fn shared_lib_path(profile: &str, name: &str, target_dir: Option<&str>) -> String {
+    match target_dir {
+        Some(dir) => format!("{}/{}.dll", dir.trim_end_matches('/'), name),
+        None => format!("./target/{profile}/{name}.dll"),
+    }
 }

src/utils/fs.rs

@@ -1,5 +1,5 @@
 use std::io;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 #[allow(dead_code)]
 pub fn check_dir(dir: Option<&str>) -> io::Result<Vec<String>> {
@@ -16,3 +16,16 @@ pub fn check_dir(dir: Option<&str>) -> io::Result<Vec<String>> {
 
     Ok(items)
 }
+
+pub fn find_project_root(start: &Path) -> io::Result<Option<PathBuf>> {
+    let mut current = start.to_path_buf();
+    loop {
+        if current.join("dcr.toml").is_file() {
+            return Ok(Some(current));
+        }
+        if !current.pop() {
+            break;
+        }
+    }
+    Ok(None)
+}

tests/cli_basic.rs

@@ -0,0 +1,248 @@
+use std::path::{Path, PathBuf};
+use std::process::Command;
+use std::sync::Once;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+static COUNTER: AtomicUsize = AtomicUsize::new(0);
+static BUILD_ONCE: Once = Once::new();
+
+fn bin_path() -> PathBuf {
+    if let Ok(exe) = std::env::var("CARGO_BIN_EXE_dcr") {
+        return PathBuf::from(exe);
+    }
+    ensure_bin_built();
+    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    path.push("target");
+    path.push("debug");
+    path.push(format!("dcr{}", std::env::consts::EXE_SUFFIX));
+    path
+}
+
+fn unique_sandbox_dir(prefix: &str) -> PathBuf {
+    let pid = std::process::id();
+    let n = COUNTER.fetch_add(1, Ordering::SeqCst);
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_nanos();
+    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    path.push("sandbox");
+    path.push("cli-tests");
+    path.push(format!("dcr_{prefix}_{pid}_{n}_{now}"));
+    std::fs::create_dir_all(&path).expect("failed to create temp dir");
+    path
+}
+
+fn run_dcr(args: &[&str], cwd: &Path) -> std::process::Output {
+    run_dcr_env(args, cwd, &[])
+}
+
+fn run_dcr_env(args: &[&str], cwd: &Path, envs: &[(&str, &str)]) -> std::process::Output {
+    let mut cmd = Command::new(bin_path());
+    cmd.args(args).current_dir(cwd);
+    for (k, v) in envs {
+        cmd.env(k, v);
+    }
+    cmd.output().expect("failed to run dcr")
+}
+
+fn ensure_bin_built() {
+    BUILD_ONCE.call_once(|| {
+        let status = Command::new("cargo")
+            .arg("build")
+            .current_dir(env!("CARGO_MANIFEST_DIR"))
+            .status()
+            .expect("failed to run cargo build");
+        assert!(status.success(), "cargo build failed");
+    });
+}
+
+fn available_compiler() -> Option<&'static str> {
+    for candidate in ["clang", "gcc", "cc"] {
+        let ok = Command::new(candidate)
+            .arg("--version")
+            .output()
+            .map(|o| o.status.success())
+            .unwrap_or(false);
+        if ok {
+            return Some(candidate);
+        }
+    }
+    None
+}
+
+#[test]
+fn help_and_version_work() {
+    let dir = unique_sandbox_dir("help");
+    let out = run_dcr(&["--help"], &dir);
+    assert!(out.status.success(), "--help should succeed");
+
+    let out = run_dcr(&["--version"], &dir);
+    assert!(out.status.success(), "--version should succeed");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(stdout.contains("dcr"), "version output should mention dcr");
+}
+
+#[test]
+fn new_creates_project_layout() {
+    let dir = unique_sandbox_dir("new");
+    let out = run_dcr(&["new", "hello"], &dir);
+    assert!(out.status.success(), "dcr new should succeed");
+
+    let project_dir = dir.join("hello");
+    assert!(project_dir.is_dir(), "project dir should exist");
+    assert!(project_dir.join("dcr.toml").is_file(), "dcr.toml missing");
+    assert!(
+        project_dir.join("src").join("main.c").is_file(),
+        "src/main.c missing"
+    );
+}
+
+#[test]
+fn init_and_clean_remove_target() {
+    let dir = unique_sandbox_dir("init");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "dcr init should succeed");
+
+    let target_debug = dir.join("target").join("debug");
+    std::fs::create_dir_all(&target_debug).expect("failed to create target/debug");
+    std::fs::write(target_debug.join("dummy.o"), "x").expect("failed to write dummy file");
+
+    let out = run_dcr(&["clean"], &dir);
+    assert!(out.status.success(), "dcr clean should succeed");
+    assert!(!dir.join("target").exists(), "target should be removed");
+}
+
+#[test]
+fn build_run_clean_flags_normal_project() {
+    let Some(compiler) = available_compiler() else {
+        eprintln!("no compiler found; skipping build/run test");
+        return;
+    };
+
+    let dir = unique_sandbox_dir("normal");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "dcr init should succeed");
+
+    let envs = [("DCR_COMPILER", compiler)];
+    let out = run_dcr_env(&["build"], &dir, &envs);
+    assert!(out.status.success(), "dcr build should succeed");
+
+    let out = run_dcr_env(&["build", "--release"], &dir, &envs);
+    assert!(out.status.success(), "dcr build --release should succeed");
+
+    let out = run_dcr_env(&["run"], &dir, &envs);
+    assert!(out.status.success(), "dcr run should succeed");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(stdout.contains("Hello World!"), "run output missing");
+
+    let out = run_dcr_env(&["clean", "--release"], &dir, &envs);
+    assert!(out.status.success(), "dcr clean --release should succeed");
+    assert!(
+        !dir.join("target").join("release").exists(),
+        "target/release should be removed"
+    );
+    assert!(
+        dir.join("target").join("debug").is_dir(),
+        "target/debug should remain"
+    );
+
+    let out = run_dcr_env(&["clean"], &dir, &envs);
+    assert!(out.status.success(), "dcr clean should succeed");
+    assert!(!dir.join("target").exists(), "target should be removed");
+}
+
+#[test]
+fn workspace_build_and_clean_all() {
+    let Some(compiler) = available_compiler() else {
+        eprintln!("no compiler found; skipping workspace test");
+        return;
+    };
+
+    let root = unique_sandbox_dir("workspace");
+    let out = run_dcr(&["init"], &root);
+    assert!(out.status.success(), "root init should succeed");
+
+    let members = [
+        ("userspace", &[][..]),
+        ("core", &["userspace"][..]),
+        ("kernel", &["core"][..]),
+    ];
+    for (name, _) in &members {
+        let member_dir = root.join("src").join(name);
+        std::fs::create_dir_all(&member_dir).expect("failed to create member dir");
+        let out = run_dcr(&["init"], &member_dir);
+        assert!(out.status.success(), "member init should succeed");
+    }
+
+    let workspace_toml = "[package]\nname = \"ws-root\"\nversion = \"0.1.0\"\n\n[build]\nlanguage = \"c\"\nstandard = \"c11\"\ncompiler = \"clang\"\nkind = \"bin\"\n\n[workspace]\nuserspace = { path = \"src/userspace\", deps = [] }\ncore = { path = \"src/core\", deps = [\"userspace\"] }\nkernel = { path = \"src/kernel\", deps = [\"core\"] }\n\n[dependencies]\n";
+    std::fs::write(root.join("dcr.toml"), workspace_toml).expect("failed to write root dcr.toml");
+
+    let envs = [("DCR_COMPILER", compiler)];
+    let out = run_dcr_env(&["build"], &root, &envs);
+    assert!(out.status.success(), "workspace build should succeed");
+
+    let out = run_dcr_env(&["build"], &root, &envs);
+    assert!(out.status.success(), "workspace build should succeed");
+
+    let out = run_dcr_env(&["build", "--release"], &root, &envs);
+    assert!(
+        out.status.success(),
+        "workspace build --release should succeed"
+    );
+
+    let out = run_dcr_env(&["clean", "--release", "--all"], &root, &envs);
+    assert!(
+        out.status.success(),
+        "workspace clean --all --release should succeed"
+    );
+
+    for (name, _) in &members {
+        let member = root.join("src").join(name);
+        assert!(
+            !member.join("target").join("release").exists(),
+            "member target/release should be removed"
+        );
+        assert!(
+            member.join("target").join("debug").exists(),
+            "member target/debug should remain"
+        );
+    }
+    assert!(
+        !root.join("target").join("release").exists(),
+        "root target/release should be removed"
+    );
+    assert!(
+        root.join("target").join("debug").exists(),
+        "root target/debug should remain"
+    );
+}
+
+#[test]
+fn dcr_test_runs_without_sandbox_dependency() {
+    let Some(compiler) = available_compiler() else {
+        eprintln!("no compiler found; skipping dcr test integration");
+        return;
+    };
+
+    let dir = unique_sandbox_dir("dcr_test_independent");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "dcr init should succeed");
+
+    let envs = [("DCR_CC", compiler)];
+    let out_init = run_dcr_env(&["test", "--init"], &dir, &envs);
+    assert!(out_init.status.success(), "dcr test --init should succeed");
+
+    let out = run_dcr_env(&["test"], &dir, &envs);
+    assert!(out.status.success(), "dcr test should succeed");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    let stderr = String::from_utf8_lossy(&out.stderr);
+    assert!(stdout.contains("TOTAL: 1"), "TOTAL summary line missing");
+    assert!(
+        stdout.contains("PASS:  1"),
+        "PASS summary line missing\nstdout:\n{}\nstderr:\n{}",
+        stdout,
+        stderr
+    );
+}

tests/cli_errors.rs

@@ -0,0 +1,297 @@
+use std::path::{Path, PathBuf};
+use std::process::Command;
+use std::sync::Once;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+static COUNTER: AtomicUsize = AtomicUsize::new(0);
+static BUILD_ONCE: Once = Once::new();
+
+fn bin_path() -> PathBuf {
+    if let Ok(exe) = std::env::var("CARGO_BIN_EXE_dcr") {
+        return PathBuf::from(exe);
+    }
+    ensure_bin_built();
+    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    path.push("target");
+    path.push("debug");
+    path.push(format!("dcr{}", std::env::consts::EXE_SUFFIX));
+    path
+}
+
+fn unique_sandbox_dir(prefix: &str) -> PathBuf {
+    let pid = std::process::id();
+    let n = COUNTER.fetch_add(1, Ordering::SeqCst);
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_nanos();
+    let mut path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+    path.push("sandbox");
+    path.push("cli-tests");
+    path.push(format!("dcr_{prefix}_{pid}_{n}_{now}"));
+    std::fs::create_dir_all(&path).expect("failed to create temp dir");
+    path
+}
+
+fn run_dcr(args: &[&str], cwd: &Path) -> std::process::Output {
+    let mut cmd = Command::new(bin_path());
+    cmd.args(args).current_dir(cwd);
+    cmd.output().expect("failed to run dcr")
+}
+
+fn run_dcr_env(args: &[&str], cwd: &Path, envs: &[(&str, &str)]) -> std::process::Output {
+    let mut cmd = Command::new(bin_path());
+    cmd.args(args).current_dir(cwd);
+    for (k, v) in envs {
+        cmd.env(k, v);
+    }
+    cmd.output().expect("failed to run dcr")
+}
+
+fn ensure_bin_built() {
+    BUILD_ONCE.call_once(|| {
+        let status = Command::new("cargo")
+            .arg("build")
+            .current_dir(env!("CARGO_MANIFEST_DIR"))
+            .status()
+            .expect("failed to run cargo build");
+        assert!(status.success(), "cargo build failed");
+    });
+}
+
+fn available_compiler() -> Option<&'static str> {
+    for candidate in ["clang", "gcc", "cc"] {
+        let ok = Command::new(candidate)
+            .arg("--version")
+            .output()
+            .map(|o| o.status.success())
+            .unwrap_or(false);
+        if ok {
+            return Some(candidate);
+        }
+    }
+    None
+}
+
+// --- Tests ---
+
+#[test]
+fn no_args_shows_help() {
+    let dir = unique_sandbox_dir("noargs");
+    let out = run_dcr(&[], &dir);
+    // Should succeed (help returns 0) and produce some output
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("DCR") || stdout.contains("dcr") || stdout.contains("USAGE"),
+        "no args should show help text"
+    );
+}
+
+#[test]
+fn unknown_command_fails() {
+    let dir = unique_sandbox_dir("unknown_cmd");
+    let out = run_dcr(&["foobar"], &dir);
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("error") || stdout.contains("Unknown"),
+        "unknown command should print error"
+    );
+}
+
+#[test]
+fn build_without_toml_fails() {
+    let dir = unique_sandbox_dir("build_no_toml");
+    let out = run_dcr(&["build"], &dir);
+    assert!(!out.status.success(), "build without dcr.toml should fail");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("dcr.toml") || stdout.contains("not found"),
+        "should mention missing dcr.toml"
+    );
+}
+
+#[test]
+fn run_without_toml_fails() {
+    let dir = unique_sandbox_dir("run_no_toml");
+    let out = run_dcr(&["run"], &dir);
+    assert!(!out.status.success(), "run without dcr.toml should fail");
+}
+
+#[test]
+fn clean_without_toml_fails() {
+    let dir = unique_sandbox_dir("clean_no_toml");
+    let out = run_dcr(&["clean"], &dir);
+    assert!(!out.status.success(), "clean without dcr.toml should fail");
+}
+
+#[test]
+fn new_existing_dir_fails() {
+    let dir = unique_sandbox_dir("new_exist");
+    // Create the project directory first
+    std::fs::create_dir_all(dir.join("hello")).expect("failed to create dir");
+    let out = run_dcr(&["new", "hello"], &dir);
+    assert!(!out.status.success(), "dcr new on existing dir should fail");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("already exists") || stdout.contains("error"),
+        "should report dir already exists"
+    );
+}
+
+#[test]
+fn init_nonempty_dir_fails() {
+    let dir = unique_sandbox_dir("init_nonempty");
+    // Put a file in the dir so it's not empty
+    std::fs::write(dir.join("dummy.txt"), "x").expect("failed to write");
+    let out = run_dcr(&["init"], &dir);
+    assert!(
+        !out.status.success(),
+        "dcr init in non-empty dir should fail"
+    );
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("not empty") || stdout.contains("error"),
+        "should report dir not empty"
+    );
+}
+
+#[test]
+fn build_unknown_flag_fails() {
+    let dir = unique_sandbox_dir("build_badflag");
+    // Init a valid project first
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "init should succeed");
+    let out = run_dcr(&["build", "--foobar"], &dir);
+    assert!(!out.status.success(), "build with unknown flag should fail");
+}
+
+#[test]
+fn run_library_project_fails() {
+    let Some(compiler) = available_compiler() else {
+        eprintln!("no compiler found; skipping run_library test");
+        return;
+    };
+
+    let dir = unique_sandbox_dir("run_lib");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "init should succeed");
+
+    // Edit dcr.toml to set kind = "staticlib"
+    let toml_path = dir.join("dcr.toml");
+    let toml = std::fs::read_to_string(&toml_path).expect("failed to read dcr.toml");
+    let updated = toml.replace("kind = \"bin\"", "kind = \"staticlib\"");
+    std::fs::write(&toml_path, updated).expect("failed to write dcr.toml");
+
+    let envs = [("DCR_COMPILER", compiler)];
+    let out = run_dcr_env(&["run"], &dir, &envs);
+    assert!(!out.status.success(), "dcr run on staticlib should fail");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("library") || stdout.contains("Cannot run"),
+        "should report cannot run library"
+    );
+}
+
+#[test]
+fn clean_specific_profile() {
+    let dir = unique_sandbox_dir("clean_profile");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "init should succeed");
+
+    // Create target/debug and target/release dirs
+    std::fs::create_dir_all(dir.join("target").join("debug")).expect("create debug");
+    std::fs::write(dir.join("target").join("debug").join("dummy.o"), "x").expect("write");
+    std::fs::create_dir_all(dir.join("target").join("release")).expect("create release");
+    std::fs::write(dir.join("target").join("release").join("dummy.o"), "x").expect("write");
+
+    // Clean only release
+    let out = run_dcr(&["clean", "--release"], &dir);
+    assert!(out.status.success(), "clean --release should succeed");
+    assert!(
+        !dir.join("target").join("release").exists(),
+        "target/release should be removed"
+    );
+    assert!(
+        dir.join("target").join("debug").is_dir(),
+        "target/debug should remain"
+    );
+}
+
+#[test]
+fn new_no_name_fails() {
+    let dir = unique_sandbox_dir("new_noname");
+    let out = run_dcr(&["new"], &dir);
+    assert!(!out.status.success(), "dcr new without name should fail");
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        stdout.contains("not specified") || stdout.contains("error"),
+        "should report name not specified"
+    );
+}
+
+#[test]
+fn staticlib_build() {
+    let Some(compiler) = available_compiler() else {
+        eprintln!("no compiler found; skipping staticlib test");
+        return;
+    };
+    let dir = unique_sandbox_dir("staticlib");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "init should succeed");
+
+    let toml_path = dir.join("dcr.toml");
+    let toml = std::fs::read_to_string(&toml_path).expect("read dcr.toml");
+    let updated = toml.replace("kind = \"bin\"", "kind = \"staticlib\"");
+    std::fs::write(&toml_path, updated).expect("write dcr.toml");
+
+    let envs = [("DCR_COMPILER", compiler)];
+    let out = run_dcr_env(&["build"], &dir, &envs);
+    assert!(out.status.success(), "staticlib build should succeed");
+    // Check that a .a file exists
+    let lib_path = dir.join("target").join("debug");
+    let has_lib = std::fs::read_dir(&lib_path)
+        .map(|entries| {
+            entries
+                .filter_map(|e| e.ok())
+                .any(|e| e.file_name().to_string_lossy().ends_with(".a"))
+        })
+        .unwrap_or(false);
+    assert!(has_lib, "staticlib should produce a .a file");
+}
+
+#[test]
+fn build_release_profile() {
+    let Some(compiler) = available_compiler() else {
+        eprintln!("no compiler found; skipping release build test");
+        return;
+    };
+    let dir = unique_sandbox_dir("release_build");
+    let out = run_dcr(&["init"], &dir);
+    assert!(out.status.success(), "init should succeed");
+
+    let envs = [("DCR_COMPILER", compiler)];
+    let out = run_dcr_env(&["build", "--release"], &dir, &envs);
+    assert!(out.status.success(), "release build should succeed");
+    assert!(
+        dir.join("target").join("release").is_dir(),
+        "target/release should exist"
+    );
+}
+
+#[test]
+fn version_contains_version_string() {
+    let dir = unique_sandbox_dir("version");
+    let out = run_dcr(&["--version"], &dir);
+    assert!(out.status.success());
+    let stdout = String::from_utf8_lossy(&out.stdout);
+    // Should contain version like "dcr 0.2.8 (target)"
+    assert!(
+        stdout.contains("dcr "),
+        "version output should start with 'dcr '"
+    );
+    assert!(
+        stdout.contains('.'),
+        "version output should contain a version number"
+    );
+}