# Doc Entities
## Master Doc Entities Table
| `api/` | DSL operations and directive contract for the mod_interface! macro | [api/readme.md](api/readme.md) | 1 |
| `feature/` | Navigational hubs for user-facing macro capabilities and their artifacts | [feature/readme.md](feature/readme.md) | 1 |
| `invariant/` | Properties that must always hold in the namespace layer propagation system | [invariant/readme.md](invariant/readme.md) | 1 |
| `pattern/` | Architectural patterns governing the five-layer cascade and crate structure | [pattern/readme.md](pattern/readme.md) | 2 |
## Master Doc Instances Table
| api | 001 | mod_interface Macro DSL | [api/001_mod_interface_macro.md](api/001_mod_interface_macro.md) |
| feature | 001 | Layered Module Interface | [feature/001_layered_module_interface.md](feature/001_layered_module_interface.md) |
| invariant | 001 | Propagation Rules | [invariant/001_propagation_rules.md](invariant/001_propagation_rules.md) |
| pattern | 001 | Exposure Level Cascade | [pattern/001_exposure_level_cascade.md](pattern/001_exposure_level_cascade.md) |
| pattern | 002 | Absorption Pattern | [pattern/002_absorption_pattern.md](pattern/002_absorption_pattern.md) |