# ito-logging — L1 (Domain)
Append-only JSONL telemetry. **Resilience invariant: logging failures MUST NEVER crash or slow down a command.**
See [`ito-rs/AGENTS.md`](../../AGENTS.md). See [`.ito/architecture.md`](../../../.ito/architecture.md).
## Key Exports
|Logger: append-only logger with write_start()/write_end()
|Outcome: Success or Error enum for command outcomes
## Design
## Dependencies
|none (standalone crate, external deps only)
## Constraints
## Quality
```bash
make check && make test && make arch-guardrails
```