# Doc Entities
## Master Doc Entities Table
| `api/` | Public interface definitions and compatibility contracts | [api/readme.md](api/readme.md) | 2 |
| `feature/` | Capability guides describing crate behaviour | [feature/readme.md](feature/readme.md) | 4 |
| `invariant/` | Behavioral contracts and enforcement mechanisms | [invariant/readme.md](invariant/readme.md) | 3 |
## Master Doc Instances Table
| api | 001 | Error-With-Report Operation Set | [api/001_err_with_trait.md](api/001_err_with_trait.md) |
| api | 002 | Debug Assertion Macros | [api/002_debug_assertions.md](api/002_debug_assertions.md) |
| feature | 001 | Error Facade | [feature/001_error_facade.md](feature/001_error_facade.md) |
| feature | 002 | Typed Errors | [feature/002_typed_errors.md](feature/002_typed_errors.md) |
| feature | 003 | Untyped Errors | [feature/003_untyped_errors.md](feature/003_untyped_errors.md) |
| feature | 004 | No-Std Support | [feature/004_no_std_support.md](feature/004_no_std_support.md) |
| invariant | 001 | Exclusive Error Dependency | [invariant/001_exclusive_dependency.md](invariant/001_exclusive_dependency.md) |
| invariant | 002 | Zero-Cost Facade | [invariant/002_zero_cost_facade.md](invariant/002_zero_cost_facade.md) |
| invariant | 003 | Alloc Feature Requires No-Std | [invariant/003_alloc_requirement.md](invariant/003_alloc_requirement.md) |