# Error Taxonomy

## Shared Rules

- Transport/protocol status meaning:
- Stable machine code/type policy:
- Human detail and redaction policy:
- Field-level error pointer format, if used:
- Correlation mechanism and retryability representation:

| Code/type | Status or protocol signal | Consumer action | Retryable? | Safe detail | Owner |
|---|---|---|---|---|---|
| | | | | | |

## Negative Cases

- Invalid syntax or shape:
- Domain validation:
- Authentication and authorization denial:
- Concurrency/precondition failure:
- Resource/rate exhaustion:
- Dependency or partial-failure behavior: