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# Contributing to ChrisOS
ChrisOS is an experimental systems project. Contributions should preserve reproducibility, architectural boundaries and evidence-based status claims.
## Read first
- **Canonical technical documentation:** https://os.christiansoftware.org/
- [Repository operational documentation](docs/README.md)
- [Development workflow](docs/development/workflow.md)
- [Testing and evidence](docs/development/testing.md)
## Setup
~~~bash
git clone https://github.com/christianrss/ChrisOS.git
cd ChrisOS
./scripts/check-dev-env.sh
make
~~~
The reference host is Debian/Ubuntu Linux. See [development environment](docs/getting-started/environment.md).
## Branches and commits
Create a topic branch from current <code>main</code>. Keep commits reviewable and scoped. Do not commit generated <code>build/</code> output, disk images, ISO images or test logs.
## Tests
Run the narrow test first, then the broadest practical gate.
Typical baseline:
~~~bash
make host-gates
~~~
For guest/hardware-facing changes, add the relevant QEMU target from <code>scripts/qemu.mk</code>.
For ChrisVM:
~~~bash
make chrisvm-test
~~~
If a relevant gate cannot be run, state that explicitly in the pull request.
## Code expectations
- Keep freestanding kernel constraints intact.
- Do not introduce host-libc assumptions into kernel code.
- Preserve explicit ownership and locking rules.
- Keep hardware/backend details behind existing abstractions where possible.
- Treat format/ABI changes as compatibility changes and document them.
- Prefer a targeted test over an unverified capability statement.
- Preserve warnings-as-errors behavior where the build already enforces it.
## Documentation expectations
The canonical documentation source is `christianrss/chrisos_site`, published at https://os.christiansoftware.org/.
Do **not** add architecture, status, audit, roadmap, specification, or subsystem-documentation files to this repository.
Update repository-local documentation only for environment, build, run, test, and contribution mechanics. Changes to architecture, interfaces, subsystem behavior, implementation status, or project direction belong in `chrisos_site`.
## Pull request checklist
- [ ] Clear and focused scope
- [ ] No generated artifacts
- [ ] Relevant host tests pass
- [ ] Relevant QEMU/ChrisVM gates pass or are explicitly listed as not run
- [ ] Architecture/ABI implications are documented
- [ ] Capability claims match the evidence level
- [ ] Canonical documentation in `chrisos_site` is updated when required
O atlas garante rastreabilidade arquivo-a-arquivo. Responsabilidade, invariantes, ownership, concorrência, segurança, desempenho e interação entre subsistemas pertencem aos capítulos autorais e devem citar este arquivo quando aplicável.
