Document identity and environment boundaries
List how devices, users and installations are identified across development, staging and production. Record who owns provisioning, credential rotation and decommissioning.
- Device identity format
- Environment endpoints
- Credential lifecycle
- Access ownership
- Provisioning and reset workflow
Make message contracts explicit
For every API or message topic, document required fields, units, timestamps, error responses and compatibility expectations. Examples should include both a successful exchange and representative failures.
State which system owns each field. Ambiguous ownership leads to duplicate transformations and silent data disagreement between firmware, application and backend.
Hand over operational evidence
Provide deployment steps, health checks, dashboards, alert meanings and a small set of test scenarios that confirm the full path from device event to cloud result.
A maintainable handover lets a new engineer answer three questions quickly: what is running, how do I verify it and what should I inspect when it fails?
