PureYAML/docs/rules/package-structure.md

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# Package and Repository Structure
PureYAML is a root Swift package.
## Required Layout
```text
PureYAML/
├── Package.swift
├── Sources/
│ ├── PureYAML.swift
│ ├── Model/
│ ├── Parsing/
│ └── Emitting/
├── Tests/
│ └── PureYAMLTests/
├── docs/
└── scripts/
```
## Rules
- Keep `Package.swift` at repository root.
- Do not create a `Packages/` folder.
- Keep production code directly under `Sources`.
- Keep tests in `Tests/PureYAMLTests`.
- Keep `Package.swift` dependency-free.
- Add new targets only when a responsibility genuinely needs isolation.
## Namespace Mapping
The namespace tree mirrors the source tree:
- `Sources/Model/Value.swift` -> `PureYAML.Model.Value`
- `Sources/Parsing/Parser.swift` -> `PureYAML.Parsing.Parser`
- `Sources/Emitting/Dumper.swift` -> `PureYAML.Emitting.Dumper`
The root namespace file, `Sources/PureYAML.swift`, is a map of namespaces only.