# Official sources

Use this reference only when you need source grounding for GCE behavior or the detailed source list.

## GCP documentation

Use these as starting points, not as proof of the user's live GCP state:
- https://cloud.google.com/compute/docs/instances
- https://cloud.google.com/compute/docs/instance-groups/managed-instance-groups
- https://cloud.google.com/compute/docs/os-patch-management
- https://cloud.google.com/compute/docs/instances/spot

## Grounding rule

Official documentation explains GCE and MIG behavior. It does not prove the user's current instance configuration, patch compliance state, auto-scaling policies, or operational state. Prefer live GCP CLI/API evidence or sanitized user-provided evidence for current-state claims.
